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Message-ID: <200502220933.j1M9XAPm047589@vmailb.mclink.it>
From: t.radice at wssitalia.it (Tiziano Radice)
Subject: R: Full-Disclosure Digest, Vol 3, Issue 42
Help: please remove me from your mail list
-----Messaggio originale-----
Da: full-disclosure-bounces@...ts.netsys.com
[mailto:full-disclosure-bounces@...ts.netsys.com] Per conto di
full-disclosure-request@...ts.netsys.com
Inviato: marted? 22 febbraio 2005 8.17
A: full-disclosure@...ts.netsys.com
Oggetto: Full-Disclosure Digest, Vol 3, Issue 42
Send Full-Disclosure mailing list submissions to
full-disclosure@...ts.netsys.com
To subscribe or unsubscribe via the World Wide Web, visit
https://lists.netsys.com/mailman/listinfo/full-disclosure
or, via email, send a message with subject or body 'help' to
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You can reach the person managing the list at
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When replying, please edit your Subject line so it is more specific
than "Re: Contents of Full-Disclosure digest..."
Today's Topics:
1. Shadow Crew back in business (n3td3v)
2. iDEFENSE Security Advisory 02.21.05: Multiple PuTTY SFTP
Client Packet Parsing Integer Overflow Vulnerabilities
(idlabs-advisories@...fense.com)
3. SD Server 4.0.70 Directory Traversal Bug (CorryL)
4. iDEFENSE Security Advisory 02.21.05: Multiple Unix/Linux
Vendor cURL/libcURL NTLM Authentication Buffer Overflow
Vulnerability (idlabs-advisories@...fense.com)
5. iDEFENSE Security Advisory 02.21.05: Multiple Unix/Linux
Vendor cURL/libcURL Kerberos Authentication Buffer Overflow
Vulnerability (idlabs-advisories@...fense.com)
6. [ GLSA 200502-28 ] PuTTY: Remote code execution (Luke Macken)
7. [gentoo-announce] [ GLSA 200502-28 ] PuTTY: Remote code
execution (Luke Macken)
8. Awake a modem with AT commands (action09)
9. Sourceforge security contact to the white courtesy phone
please. (J.A. Terranson)
10. Delivery by mail (Rizwanalikhan)
11. Re: Arkeia Network Backup Client Remote Access (H D Moore)
12. phpBB Fixed full path disclosure in username handling -
2.0.11 (Aaron Horst)
13. Registration is accepted (Rizwanalikhan)
----------------------------------------------------------------------
Message: 1
Date: Mon, 21 Feb 2005 17:47:40 +0000
From: n3td3v <xploitable@...il.com>
Subject: [Full-Disclosure] Shadow Crew back in business
To: full-disclosure@...ts.netsys.com
Message-ID: <4b6ee93105022109476c88ac53@...l.gmail.com>
Content-Type: text/plain; charset=US-ASCII
The Shadow Crew who are under investigation and the American Secret
Service replaced the homepage of, with a federal notice, is back in
business on a new domain.
Seen today on the popular chat service Yahoo! Chat, spamming its
advert as the alias "fire_p0w3r"
An example of the spam is below:
fire_p0w3r: Want CC ? Credit Cards and Carding Related Subjects ,
Cyberspace , Novelty Identification, Documents and other Related
Subjects , Tutorials and How-To's , Non-business related talks ,
Scumbags & Rippers , Hardware and Other Related Subjects , Vendor's
products & services , Request Review , Auction Forum , Feedbacks ,
STRICTLY BUSINESS , Then Come And Register At www.Shadow-Crew.net NOW
!
Hopefully the American Secret Service will shut this site down like
they did with the other.
I advise Yahoo! to suspend the account fire_p0w3r, while keeping the
connection information for when the American Secret Service come to
get it from you.
Thanks, n3td3v
My list is located at http://groups-beta.google.com/group/n3td3v if
you want off-list contact.
Hi to Yahoo! Security Team and the American Secret Service, n3td3v is
always happy to provide intelligence to take away silly groups like
Shadow Crew.
------------------------------
Message: 2
Date: Mon, 21 Feb 2005 13:02:24 -0500
From: idlabs-advisories@...fense.com
Subject: [Full-Disclosure] iDEFENSE Security Advisory 02.21.05:
Multiple PuTTY SFTP Client Packet Parsing Integer Overflow
Vulnerabilities
To: <idlabs-advisories@...fense.com>
Message-ID:
<FB24803D1DF2A34FA59FC157B77C970503E24608@...erv04.idef.com>
Content-Type: text/plain; charset="iso-8859-1"
Multiple PuTTY SFTP Client Packet Parsing Integer Overflow
Vulnerabilities
www.idefense.com/application/poi/display?id=201&type=vulnerabilities
February 21, 2005
I. BACKGROUND
PuTTY is a free implementation of Telnet and SSH for Win32 and Unix
platforms, along with an xterm terminal emulator.
More information is available on the vendor's website:
http://www.chiark.greenend.org.uk/~sgtatham/putty/
II. DESCRIPTION
Remote exploitation of multiple integer overflow vulnerabilities in
Simon Tatham's PuTTY can allow attackers to execute arbitrary code.
The first vulnerability specifically exists due to insufficient
validation of user-supplied data passed to a memcpy function. The PuTTY
sftp implementation allows attackers to supply arbitrary values for the
stored length of the string in the packet. This may be observed in the
sftp_pkt_getstring() function from sftp.c in PuTTY source code:
static void sftp_pkt_getstring(struct sftp_packet *pkt,
char **p, int *length)
{
*p = NULL;
if (pkt->length - pkt->savedpos < 4)
return;
/* length value is taken from user-supplied data */
*length = GET_32BIT(pkt->data + pkt->savedpos);
pkt->savedpos += 4;
/* this check will be passed if length < 0 */
if (pkt->length - pkt->savedpos < *length)
return;
*p = pkt->data + pkt->savedpos;
pkt->savedpos += *length;
}
This function is called from fxp_open_recv() and passes the returned
string pointer and string length to the mkstr() function:
struct fxp_handle *fxp_open_recv(struct sftp_packet *pktin,
struct sftp_request *req)
{
...
/* sftp_pkt_getstring call with controlled len value */
sftp_pkt_getstring(pktin, &hstring, &len);
...
handle = snew(struct fxp_handle);
/* heap corruption will occur if len == -1 */
handle->hstring = mkstr(hstring, len);
handle->hlen = len;
sftp_pkt_free(pktin);
return handle;
...
}
If length is passed as -1, a malloc(0) will occur when the snewn() macro
is called:
static char *mkstr(char *s, int len)
{
/* malloc(0) if len == -1 */
char *p = snewn(len + 1, char);
/* user controlled heap corruption */
memcpy(p, s, len);
p[len] = '\0';
return p;
}
Finally, when the memcpy function is called heap corruption will occur
leading to potential code execution.
The second vulnerability specifically exists due to insufficient
validation of user-supplied data passed to a malloc function. This may
be observed in the fxp_readdir_recv() function from PuTTY source code:
struct fxp_names *fxp_readdir_recv(struct sftp_packet *pktin,
struct sftp_request *req) {
/* 32 bit value from packet */
ret->nnames = sftp_pkt_getuint32(pktin);
/*
* The integer overflow occurs when ret->nnames is referenced
* the snewn macro calls malloc() wrapper
* #define snewn(n, type) ((type *)smalloc((n)*sizeof(type)))
*/
ret->names = snewn(ret->nnames, struct fxp_name);
for (i = 0; i < ret->nnames; i++) {
char *str;
int len;
sftp_pkt_getstring(pktin, &str, &len);
/* pointer to arbitrary data from packet */
ret->names[i].filename = mkstr(str, len);
sftp_pkt_getstring(pktin, &str, &len);
/* pointer to arbitrary data from packet */
ret->names[i].longname = mkstr(str, len);
/* pointer to arbitrary data from packet */
ret->names[i].attrs = sftp_pkt_getattrs(pktin);
}
This function is called from scp_get_sink_action() in scp.c and
sftp_cmd_ls() in sftp.c and can lead to remote code execution via heap
corruption. Sample debugger output of heap corruption is shown below:
psftp> ls
Listing directory /home/test
Program received signal SIGSEGV, Segmentation fault.
0x4009173c in memcpy () from /lib/libc.so.6
(gdb) bt
#0 0x4009173c in memcpy () from /lib/libc.so.6
#1 0x0805675f in mkstr (s=0x4e20 <Address 0x4e20 out of bounds>, len=0)
#2 0x0805748e in fxp_readdir_recv (pktin=0x809bc10, req=0x4e20)
#3 0x0804f7b8 in sftp_cmd_ls (cmd=0x4e20) at ../psftp.c:251
#4 0x08051955 in do_sftp (mode=0, modeflags=0, batchfile=0x0)
#5 0x080525f8 in psftp_main (argc=4, argv=0xbffff494)
#6 0x08080500 in main (argc=20000, argv=0x4e20)
(gdb) up 2
#2 0x0805748e in fxp_readdir_recv (pktin=0x809bc10, req=0x4e20)
952 ret->names[i].filename = mkstr(str, len);
(gdb) x/8x *(int)pktin
0x80acc58: 0x01000068 0x66666600 0x00000067 0x42424208
0x80acc68: 0x42424242 0x00000042 0x44444408 0x44444444
(gdb) print (struct sftp_packet)pktin
$2 = {data = 0x809bc10 "XL\n\bYF", length = 134885120,
maxlen = -1073744968, savedpos = 134551097, type = 134885088}
III. ANALYSIS
Successful exploitation allows remote attackers to execute arbitrary
code under the privileges of the user running PuTTY. The client must be
directed to connect to a malicious server in order to trigger the
vulnerability. It should be noted that this vulnerability may affect
applications which use PuTTY source code or binaries as a SSH protocol
backend. An example of one such product would be WinSCP3, a popular
graphical sftp/scp application for Windows.
IV. DETECTION
iDEFENSE has confirmed that PuTTY 0.56 is vulnerable. It is suspected
that earlier versions are also vulnerable.
The following vendors distribute susceptible PuTTY packages within
their respective operating system distributions:
* FreeBSD Project:
FreeBSD 4.9, 4.10, 5.0, 5.1 and 5.2.1
* Gentoo Foundation Inc.:
Gentoo Linux 1.1a, 1.2, 1.4, 2004.0, 2004.1 and 2004.2
V. WORKAROUND
Use an alternate SSH client to connect to untrusted hosts until the
vendor releases a patch.
VI. VENDOR RESPONSE
Vendor advisories for these issues are available at:
http://www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/vuln-sftp-string.
html
http://www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/vuln-sftp-readdir
.html
VII. CVE INFORMATION
The Common Vulnerabilities and Exposures (CVE) project has assigned the
names CAN-2005-0467 to these issues. This is a candidate for inclusion
in the CVE list (http://cve.mitre.org), which standardizes names for
security problems.
VIII. DISCLOSURE TIMELINE
02/18/2005 Initial vendor notification
02/19/2005 Initial vendor response
02/21/2005 Public disclosure
IX. CREDIT
Gakl Delalleau credited with this discovery.
Get paid for vulnerability research
http://www.idefense.com/poi/teams/vcp.jsp
X. LEGAL NOTICES
Copyright ) 2005 iDEFENSE, Inc.
Permission is granted for the redistribution of this alert
electronically. It may not be edited in any way without the express
written consent of iDEFENSE. If you wish to reprint the whole or any
part of this alert in any other medium other than electronically, please
email customerservice@...fense.com for permission.
Disclaimer: The information in the advisory is believed to be accurate
at the time of publishing based on currently available information. Use
of the information constitutes acceptance for use in an AS IS condition.
There are no warranties with regard to this information. Neither the
author nor the publisher accepts any liability for any direct, indirect,
or consequential loss or damage arising from use of, or reliance on,
this information.
------------------------------
Message: 3
Date: Mon, 21 Feb 2005 20:41:49 +0100
From: "CorryL" <corryl@...overde.com>
Subject: [Full-Disclosure] SD Server 4.0.70 Directory Traversal Bug
To: <full-disclosure@...ts.netsys.com>
Cc: bugtraq@...urityfocus.com
Message-ID: <00d001c5184d$63772bf0$0100a8c0@...ver>
Content-Type: text/plain; charset="iso-8859-1"
..:x0n3-h4ck Italian Security Team:..
/*Advisories*\
*/
Application: SD Server
Url Vendor: http://www.gdsoftware.dk/
Version: <= 4.0.70
Platforms: Windows
Bug: Directory Traversal
Exploitation: Remote
Author: CorryL
Email Author: corryl80@...il.com
Url Author: www.x0n3-h4ck.org
*\
{Description}
The SD Server is a easy http server, A remote user can obtain files on the
system that are located outside of
the web document directory.
{Bug}
http://victimhost/../../../windows/repair/sam
A remote user succeeds to read the file sam of the system where to be in
execution SD Server.
{Vendor Status}
20/02/2005 Vendor notification
20/02/2005 Vendor response
21/02/2005 Vendor Fix the Bug
{Fix}
In version 4.0.0.72
http://www.gdsoftware.dk/dl_file.asp?link=SDServer 4.0.0.72.zip
CorryL
corryl80@...il.com
www.x0n3-h4ck.org
Italian Security Team
_________________________________
www.seekstat.it is your web stat
------------------------------
Message: 4
Date: Mon, 21 Feb 2005 15:28:41 -0500
From: idlabs-advisories@...fense.com
Subject: [Full-Disclosure] iDEFENSE Security Advisory 02.21.05:
Multiple Unix/Linux Vendor cURL/libcURL NTLM
Authentication Buffer
Overflow Vulnerability
To: <idlabs-advisories@...fense.com>
Message-ID:
<FB24803D1DF2A34FA59FC157B77C970503E24617@...erv04.idef.com>
Content-Type: text/plain; charset="us-ascii"
Multiple Unix/Linux Vendor cURL/libcURL NTLM Authentication Buffer
Overflow Vulnerability
iDEFENSE Security Advisory 02.21.05:
www.idefense.com/application/poi/display?id=202&type=vulnerabilities
February 21, 2005
I. BACKGROUND
cURL is a command line tool for transferring files with URL syntax,
supporting FTP, FTPS, HTTP, HTTPS, GOPHER, TELNET, DICT, FILE and LDAP.
More information about cURL and libcURL is available from:
http://curl.haxx.se/
II. DESCRIPTION
Remote exploitation of a stack-based buffer overflow in various Unix /
Linux vendors implementations of cURL could allow for arbitrary code
execution on the targeted host.
An exploitable stack-based buffer overflow condition exists when using
NT Lan Manager (NTLM) authentication. The problem specifically exists
within Curl_input_ntlm() defined in lib/http_ntlm.c. Within this
function an unsigned stack-based character array of size 256, buffer[],
is passed to the Curl_base64_decode() routine defined in lib/base64.c as
can be seen here:
size_t size = Curl_base64_decode(header, (char *)buffer);
The Curl_base64_decode() routine relies on the calling function to
validate the decoded length. This function base64 decodes and copies
data directly from the HTTP reply of a server to the destination buffer,
in this case buffer[]. An attacker can construct a long base64 encoded
malicious payload that upon decoding will overflow the 256 byte static
buffer and overwrite the saved EIP. This in turn can lead to arbitrary
code execution.
III. ANALYSIS
Successful exploitation allows remote attackers to execute arbitrary
code
under the privileges of the target user. Exploitation requires that an
attacker either coerce or force a target to connect to a malicious
server using NTLM authentication.
IV. DETECTION
iDEFENSE has confirmed the existence of this vulnerability in cURL
version 7.12.1. It is suspected that prior versions are affected as
well.
Any application built using a vulnerable version libcURL will also be
affected.
V. WORKAROUND
Replace the static buffer allocation on line 106 in lib/http_ntlm.c:
unsigned char buffer[256];
With a dynamic buffer allocation:
unsigned char *buffer = (unsigned char *)malloc(strlen(header));
and recompile cURL.
VI. VENDOR RESPONSE
No vendor response received.
VII. CVE INFORMATION
A Mitre Corp. Common Vulnerabilities and Exposures (CVE) number has not
been assigned yet.
VIII. DISCLOSURE TIMELINE
12/21/2004 Initial vendor notification - No response
02/10/2005 Secondary vendor notification - No response
02/21/2005 Public disclosure
IX. CREDIT
infamous41md[at]hotpop.com is credited with this discovery.
Get paid for vulnerability research
http://www.idefense.com/poi/teams/vcp.jsp
X. LEGAL NOTICES
Copyright (c) 2005 iDEFENSE, Inc.
Permission is granted for the redistribution of this alert
electronically. It may not be edited in any way without the express
written consent of iDEFENSE. If you wish to reprint the whole or any
part of this alert in any other medium other than electronically, please
email customerservice@...fense.com for permission.
Disclaimer: The information in the advisory is believed to be accurate
at the time of publishing based on currently available information. Use
of the information constitutes acceptance for use in an AS IS condition.
There are no warranties with regard to this information. Neither the
author nor the publisher accepts any liability for any direct, indirect,
or consequential loss or damage arising from use of, or reliance on,
this information.
------------------------------
Message: 5
Date: Mon, 21 Feb 2005 15:28:42 -0500
From: idlabs-advisories@...fense.com
Subject: [Full-Disclosure] iDEFENSE Security Advisory 02.21.05:
Multiple Unix/Linux Vendor cURL/libcURL Kerberos
Authentication Buffer
Overflow Vulnerability
To: <idlabs-advisories@...fense.com>
Message-ID:
<FB24803D1DF2A34FA59FC157B77C970503E24618@...erv04.idef.com>
Content-Type: text/plain; charset="us-ascii"
Multiple Unix/Linux Vendor cURL/libcURL Kerberos Authentication Buffer
Overflow Vulnerability
iDEFENSE Security Advisory 02.21.05:
www.idefense.com/application/poi/display?id=203&type=vulnerabilities
February 21, 2005
I. BACKGROUND
cURL is a command line tool for transferring files with URL syntax,
supporting FTP, FTPS, HTTP, HTTPS, GOPHER, TELNET, DICT, FILE and LDAP.
More information about cURL and libcURL is available from:
http://curl.haxx.se/
II. DESCRIPTION
Remote exploitation of a stack-based buffer overflow in various Unix /
Linux vendors' implementation of cURL could allow for arbitrary code
execution on the targeted host.
An exploitable stack-based buffer overflow condition exists when using
Kerberos authentication. The problem specifically exists within the
functions Curl_krb_kauth() and krb4_auth() defined in lib/krb4.c.
Within these functions a statically allocated stack-based buffer of size
1250, from struct KTEXT_ST.dat, is passed to the Curl_base64_decode()
routine defined in lib/base64.c as can be seen here:
len = Curl_base64_decode(p, (char *)adat.dat);
tmp = Curl_base64_decode(p, (char *)tkt.dat);
The Curl_base64_decode() routine relies on the calling function to
validate the decoded length. This function base64 decodes and copies
data directly from the HTTP reply of a server to the destination buffer,
in this case buffer[]. An attacker can construct a long base64 encoded
malicious payload that upon decoding will overflow the static buffer and
overwrite the saved EIP. This in turn can lead to arbitrary code
execution.
III. ANALYSIS
Successful exploitation allows remote attackers to execute arbitrary
code
under the privileges of the target user. Exploitation requires that an
attacker either coerce or force a target to connect to a malicious
server using Kerberos authentication.
IV. DETECTION
iDEFENSE has confirmed the existence of this vulnerability in cURL
version 7.12.1. It is suspected that prior versions are affected as
well.
Any application built using a vulnerable version libcURL will also be
affected.
V. WORKAROUND
Recompile cURL without Kerberos support if it is not needed.
VI. VENDOR RESPONSE
No vendor response received.
VII. CVE INFORMATION
A Mitre Corp. Common Vulnerabilities and Exposures (CVE) number has not
been assigned yet.
VIII. DISCLOSURE TIMELINE
12/23/2004 Initial vendor notification - No response
02/10/2005 Secondary vendor notification - No response
02/21/2005 Public disclosure
IX. CREDIT
infamous41md[at]hotpop.com is credited with this discovery.
Get paid for vulnerability research
http://www.idefense.com/poi/teams/vcp.jsp
X. LEGAL NOTICES
Copyright (c) 2005 iDEFENSE, Inc.
Permission is granted for the redistribution of this alert
electronically. It may not be edited in any way without the express
written consent of iDEFENSE. If you wish to reprint the whole or any
part of this alert in any other medium other than electronically, please
email customerservice@...fense.com for permission.
Disclaimer: The information in the advisory is believed to be accurate
at the time of publishing based on currently available information. Use
of the information constitutes acceptance for use in an AS IS condition.
There are no warranties with regard to this information. Neither the
author nor the publisher accepts any liability for any direct, indirect,
or consequential loss or damage arising from use of, or reliance on,
this information.
------------------------------
Message: 6
Date: Mon, 21 Feb 2005 16:01:26 -0500
From: Luke Macken <lewk@...too.org>
Subject: [Full-Disclosure] [ GLSA 200502-28 ] PuTTY: Remote code
execution
To: gentoo-announce@...too.org
Cc: security-alerts@...uxsecurity.com, bugtraq@...urityfocus.com,
full-disclosure@...ts.netsys.com
Message-ID: <20050221210126.GA18728@...servo.hsd1.ma.comcast.net>
Content-Type: text/plain; charset="us-ascii"
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Gentoo Linux Security Advisory GLSA 200502-28
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
http://security.gentoo.org/
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Severity: Normal
Title: PuTTY: Remote code execution
Date: February 21, 2005
Bugs: #82753
ID: 200502-28
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Synopsis
========
PuTTY was found to contain vulnerabilities that can allow a malicious
SFTP server to execute arbitrary code on unsuspecting PSCP and PSFTP
clients.
Background
==========
PuTTY is a popular SSH client, PSCP is a secure copy implementation,
and PSFTP is a SSH File Transfer Protocol client.
Affected packages
=================
-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 net-misc/putty < 0.57 >= 0.57
Description
===========
Two vulnerabilities have been discovered in the PSCP and PSFTP clients,
which can be triggered by the SFTP server itself. These issues are
caused by the improper handling of the FXP_READDIR response, along with
other string fields.
Impact
======
An attacker can setup a malicious SFTP server that would send these
malformed responses to a client, potentially allowing the execution of
arbitrary code on their system.
Workaround
==========
There is no known workaround at this time.
Resolution
==========
All PuTTY users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=net-misc/putty-0.57"
References
==========
[ 1 ] PuTTY vulnerability vuln-sftp-readdir
http://www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/vuln-sftp-readdir
.html
[ 2 ] PuTTY vulnerability vuln-sftp-string
http://www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/vuln-sftp-string.
html
[ 3 ] CAN-2005-0467
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-0467
[ 4 ] iDEFENSE Advisory
http://www.idefense.com/application/poi/display?id=201&type=vulnerabilities
Availability
============
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:
http://security.gentoo.org/glsa/glsa-200502-28.xml
Concerns?
=========
Security is a primary focus of Gentoo Linux and ensuring the
confidentiality and security of our users machines is of utmost
importance to us. Any security concerns should be addressed to
security@...too.org or alternatively, you may file a bug at
http://bugs.gentoo.org.
License
=======
Copyright 2005 Gentoo Foundation, Inc; referenced text
belongs to its owner(s).
The contents of this document are licensed under the
Creative Commons - Attribution / Share Alike license.
http://creativecommons.org/licenses/by-sa/2.0
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Message: 7
Date: Mon, 21 Feb 2005 16:01:26 -0500
From: Luke Macken <lewk@...too.org>
Subject: [Full-Disclosure] [gentoo-announce] [ GLSA 200502-28 ] PuTTY:
Remote code execution
To: the_eye@...i.at
Cc: security-alerts@...uxsecurity.com, bugtraq@...urityfocus.com,
full-disclosure@...ts.netsys.com
Message-ID: <20050221210126.GA18728@...servo.hsd1.ma.comcast.net>
Content-Type: text/plain; charset="us-ascii"
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Gentoo Linux Security Advisory GLSA 200502-28
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
http://security.gentoo.org/
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Severity: Normal
Title: PuTTY: Remote code execution
Date: February 21, 2005
Bugs: #82753
ID: 200502-28
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Synopsis
========
PuTTY was found to contain vulnerabilities that can allow a malicious
SFTP server to execute arbitrary code on unsuspecting PSCP and PSFTP
clients.
Background
==========
PuTTY is a popular SSH client, PSCP is a secure copy implementation,
and PSFTP is a SSH File Transfer Protocol client.
Affected packages
=================
-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 net-misc/putty < 0.57 >= 0.57
Description
===========
Two vulnerabilities have been discovered in the PSCP and PSFTP clients,
which can be triggered by the SFTP server itself. These issues are
caused by the improper handling of the FXP_READDIR response, along with
other string fields.
Impact
======
An attacker can setup a malicious SFTP server that would send these
malformed responses to a client, potentially allowing the execution of
arbitrary code on their system.
Workaround
==========
There is no known workaround at this time.
Resolution
==========
All PuTTY users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=net-misc/putty-0.57"
References
==========
[ 1 ] PuTTY vulnerability vuln-sftp-readdir
http://www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/vuln-sftp-readdir
.html
[ 2 ] PuTTY vulnerability vuln-sftp-string
http://www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/vuln-sftp-string.
html
[ 3 ] CAN-2005-0467
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-0467
[ 4 ] iDEFENSE Advisory
http://www.idefense.com/application/poi/display?id=201&type=vulnerabilities
Availability
============
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:
http://security.gentoo.org/glsa/glsa-200502-28.xml
Concerns?
=========
Security is a primary focus of Gentoo Linux and ensuring the
confidentiality and security of our users machines is of utmost
importance to us. Any security concerns should be addressed to
security@...too.org or alternatively, you may file a bug at
http://bugs.gentoo.org.
License
=======
Copyright 2005 Gentoo Foundation, Inc; referenced text
belongs to its owner(s).
The contents of this document are licensed under the
Creative Commons - Attribution / Share Alike license.
http://creativecommons.org/licenses/by-sa/2.0
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Message: 8
Date: Tue, 22 Feb 2005 00:17:08 +0100
From: action09 <action09@...ao.org>
Subject: [Full-Disclosure] Awake a modem with AT commands
To: full-disclosure@...ts.netsys.com
Message-ID: <1109027828.5917.18.camel@...kstation>
Content-Type: text/plain
Hi!
I'm looking for specially crafted Hayes AT commands to awake a computer
( behind a firewall, connected to an internal LAN , but --also--
connected to an external phone line ) .
The machine is a Windows 2K Pro, someone can help please ?
Is there a way to awake a dialup modem, have a shell on it after ? how ?
Thx a by advance dor any clue.
sorry for my bad english.
A-Xess
------------------------------
Message: 9
Date: Mon, 21 Feb 2005 17:44:24 -0600 (CST)
From: "J.A. Terranson" <measl@....org>
Subject: [Full-Disclosure] Sourceforge security contact to the white
courtesy phone please.
To: full-disclosure@...ts.netsys.com
Message-ID: <20050221173916.H61960@...r.zsa.bet>
Content-Type: TEXT/PLAIN; charset=US-ASCII
Good (morning||afternoon||evening||grief),
I have been trying to reach the Security contact, in fact ANY
security contact at Sourceforge for several days now, to no avail.
I *urgently* need to speak to someone over there. And, while
we're at it, I note publicly that (a) Your switchboard has no option for
Security, (b) your operator never answers, (c) the name I was trying for a
while is accepted by the automated attendant yet refused when transferred
("That number cannot be reached from here"), and (d) Sending to your role
accounts does not get the desired response.
Email to measl@....org or a phone call to the mfn.org role account
should both work. I would STRONGLY recommend that someone over there call
me whenever they see this, regardless of time of day or night.
--
Yours,
J.A. Terranson
sysadmin@....org
0xBD4A95BF
"Quadriplegics think before they write stupid pointless
shit...because they have to type everything with their noses."
http://www.tshirthell.com/
------------------------------
Message: 10
Date: Mon, 21 Feb 2005 20:19:41 +0800
From: "Rizwanalikhan" <rizwanalikhan74@...oo.com>
Subject: [Full-Disclosure] Delivery by mail
To: "Full-disclosure" <full-disclosure@...ts.netsys.com>
Message-ID: <vyaunvbhudswagtoqer@...ts.netsys.com>
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Message: 11
Date: Mon, 21 Feb 2005 21:01:29 -0600
From: H D Moore <fdlist@...italoffense.net>
Subject: Re: [Full-Disclosure] Arkeia Network Backup Client Remote
Access
To: full-disclosure@...ts.netsys.com
Message-ID: <200502212101.29457.fdlist@...italoffense.net>
Content-Type: text/plain; charset="iso-8859-1"
Just to clarify, the user manual *does* mention client security and gives
instructions for locking down the Arkeia agent. Unfortunately this is not
enabled by default and only restricts access on a per-host basis.
Appendix B: System Security (not sure how I missed this before)
ftp://ftp.arkeia.com/pub/manual/arkeia5/anb/Arkeia_User_Manual.pdf
-HD
On Sunday 20 February 2005 14:41, I wrote:
> Anyone able to connect to TCP port 617 can gain read/write access to
> the filesystem of any host running the Arkeia agent software.
------------------------------
Message: 12
Date: Tue, 22 Feb 2005 00:12:07 -0500
From: Aaron Horst <anthrax101@...il.com>
Subject: [Full-Disclosure] phpBB Fixed full path disclosure in
username handling - 2.0.11
To: full-disclosure@...ts.netsys.com
Message-ID: <ab13993b05022121122c3c2437@...l.gmail.com>
Content-Type: text/plain; charset=US-ASCII
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I. BACKGROUND
phpBB is a high powered, fully scalable, and highly customizable Open
Source bulletin board package. phpBB has a user-friendly interface,
simple and straightforward administration panel, and helpful FAQ.
Based on the powerful PHP server language and your choice of MySQL,
MS-SQL, PostgreSQL or Access/ODBC database servers, phpBB is the
ideal free community solution for all web sites.
II. DESCRIPTION
The phpbb_clean_username function has an improper order of execution
allowing path and SQL table disclosure. The substr function should be
called before extra backslash (\) characters are stripped from the
string to force valid SQL requests. If it is not stripped after the
substr command, it is possible to remove the second backslash
character in a previously addslashes string (\). The following code
around line 80 in includes\functions.php is the problem:
$username = htmlspecialchars(rtrim(trim($username), "\\"));
$username = substr(str_replace("\\'", "'", $username), 0, 25);
$username = str_replace("'", "\\'", $username);
This is a trivial error, not very worrying. In some configurations
this could possibly be used for either cross site scripting or SQL
injection, however it does not appear that phpBB v2.0.11 is
vulnerable to these attacks.
The following actions are susceptible to this attack:
Login
Password reminder
Add a member to a group
Post by a user who is not logged in
Search by username
Search for username
Send private message
View users profile
To attack any of these actions, attempt to submit the username
"ABCDEFGHIJKLMNOPQRSTUVWX\YZ" (Note \ character, there must be
trailing characters after that character)
III. FIX
To alleviate this issue, the code around line 80 of
includes\functions.php should be changed as follows:
$username = substr(htmlspecialchars(str_replace("\\'", "'",
trim($username))), 0, 25);
$username = rtrim($username, "\\");
$username = str_replace("'", "\\'", $username);
An upgrade to phpBB v2.0.12 includes this fix.
III. ANALYSIS
This report was created based on phpBB v2.0.11. It was discovered on
12/30/04. It was also independently discovered by kaosone+[ONE]+ on
2/19/04, and posted to the bugtraq mailing list.
AnthraX101
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Message: 13
Date: Tue, 22 Feb 2005 02:18:41 +0800
From: "Rizwanalikhan" <rizwanalikhan74@...oo.com>
Subject: [Full-Disclosure] Registration is accepted
To: "Full-disclosure" <full-disclosure@...ts.netsys.com>
Message-ID: <ozpjbjlsflodsusbwea@...ts.netsys.com>
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