bugtraq - Re: Unfiltered escape sequences in filenames contained in ZIP archives wouldn't be escaped on displaying or logging, and can also lead to bypass AV scanning

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Date: Wed, 16 Mar 2005 10:48:45 +0100
From: "Dr. Peter Bieringer" <pbieringer@...asec.de>
To: "Michael J. Pomraning" <mjp-bugtraq@...urepipe.com>
Cc: full-disclosure@...ts.grok.org.uk, bugtraq@...urityfocus.com
Subject: Re: Unfiltered escape sequences in filenames
 contained in ZIP
 archives  wouldn't be escaped on displaying or logging, and can also lead to
 bypass AV scanning




--On Dienstag, 15. März 2005 13:51 -0600 "Michael J. Pomraning" 
<mjp-bugtraq@...urepipe.com> wrote:

>    $ /usr/local/bin/sweep -ss -archive -all
> unfiltered-escape-sequences-in-filename-eicar.zip     >>> Virus
> 'EICAR-AV-Test' found in file
> unfiltered-escape-sequences-in-filename-eicar.zip/Test_[2J_[2;5m_[1;31mHA
> CKER ATTACK_[2;25m_[22;30m_[3q.txt/eicar_com.zip/eicar.com    $ md5sum
> unfiltered-escape-sequences-in-filename-eicar.zip
>    38363004047dc11b206305bd3660d68f
> unfiltered-escape-sequences-in-filename-eicar.zip
>
> This is using engine 2.28.4, as in your tests.  The consituent filenames
> are escaped before being displayed, too (sadly excepting ASCII BEL).

Also not ASCII BS, we've created an additional ZIP file for testing:

Available here:
<ftp://ftp.aerasec.de/pub/advisories/unfiltered-escape-sequences/mixed2-eicar.zip>

$ unzip -l mixed2-eicar.zip
Archive:  mixed2-eicar.zip
  Length     Date   Time    Name
 --------    ----   ----    ----
      308  03-10-05 12:00   eicarcom2.zip^H^H^Htxt
      308  03-10-05 12:00   eicarcom2.zip
 --------                   -------
      616

$ /usr/local/bin/sweep -sc -nc -ss  -archive -all mixed2-eicar.zip
>>> Virus 'EICAR-AV-Test' found in file
>>> mixed2-eicar.zip/eicarcom2.txt/eicar_com.zip/eicar.com
>>> Virus 'EICAR-AV-Test' found in file
>>> mixed2-eicar.zip/eicarcom2.zip/eicar_com.zip/eicar.com

Note the difference: eicarcom2.txt <-> eicarcom2.zip

Regards,
	Peter
-- 
Dr. Peter Bieringer                             Phone: +49-8102-895190
AERAsec Network Services and Security GmbH        Fax: +49-8102-895199
Wagenberger Strasse 1                          Mobile: +49-174-9015046
D-85662 Hohenbrunn                       E-Mail: pbieringer@...asec.de
Germany                                Internet: http://www.aerasec.de

_______________________________________________
Full-Disclosure - We believe in it.
Charter: http://lists.grok.org.uk/full-disclosure-charter.html
Hosted and sponsored by Secunia - http://www.secunia.com/