bugtraq - MDKSA-2005:186-1 - Updated lynx packages fix remote buffer overflow

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Message-ID: <E1EUspa-0001QR-G5@mercury.mandriva.com>
Date: Wed, 26 Oct 2005 15:29:10 -0600
From: Mandriva Security Team <security@...driva.com>
To: bugtraq@...urityfocus.com
Subject: MDKSA-2005:186-1 - Updated lynx packages fix remote buffer overflow


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 _______________________________________________________________________
 
 Mandriva Linux Security Advisory                       MDKSA-2005:186-1
 http://www.mandriva.com/security/
 _______________________________________________________________________
 
 Package : lynx
 Date    : October 26, 2005
 Affected: 10.1,  10.2,  2006.0,  Corporate 2.1,  Corporate 3.0,
           Multi Network Firewall 2.0
 _______________________________________________________________________
 
 Problem Description:
 
 Ulf Harnhammar discovered a remote buffer overflow in lynx versions
 2.8.2 through 2.8.5.
 
 When Lynx connects to an NNTP server to fetch information about the
 available articles in a newsgroup, it will call a function called
 HTrjis() with the information from certain article headers. The
 function adds missing ESC characters to certain data, to support
 Asian character sets. However, it does not check if it writes outside
 of the char array buf, and that causes a remote stack-based buffer
 overflow, with full control over EIP, EBX, EBP, ESI and EDI.                    
                                                                                 
 Two attack vectors to make a victim visit a URL to a dangerous news
 server are: (a) *redirecting scripts*, where the victim visits some
 web page and it redirects automatically to a malicious URL, and
 (b) *links in web pages*, where the victim visits some web page
 and selects a link on the page to a malicious URL. Attack vector
 (b) is helped by the fact that Lynx does not automatically display
 where links lead to, unlike many graphical web browsers.                 
 
 The updated packages have been patched to address this issue.

 Update:

 The previous patchset had a bug in the patches themselves, which was
 uncovered by Klaus Singvogel of Novell/SUSE in auditing crashes on 
 some architectures.
 _______________________________________________________________________

 References:
 
 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-3120
 _______________________________________________________________________
 
 Updated Packages:
 
 Corporate Server 2.1:
 8f85c354b06417711e13abe45dcbf0d8  corporate/2.1/RPMS/lynx-2.8.5-0.10.3.C21mdk.dev.8.i586.rpm
 74becbc3b1be96908c069180e36ff3b2  corporate/2.1/SRPMS/lynx-2.8.5-0.10.3.C21mdk.dev.8.src.rpm

 Corporate Server 2.1/X86_64:
 0a4e7145d0920dde82734f8036c50baa  x86_64/corporate/2.1/RPMS/lynx-2.8.5-0.10.3.C21mdk.dev.8.x86_64.rpm
 74becbc3b1be96908c069180e36ff3b2  x86_64/corporate/2.1/SRPMS/lynx-2.8.5-0.10.3.C21mdk.dev.8.src.rpm

 Mandriva Linux 10.1:
 80e0addf6efd297866bba33f4b8070b6  10.1/RPMS/lynx-2.8.5-1.2.101mdk.i586.rpm
 13e5e506a05b448426d639d5e88a8896  10.1/SRPMS/lynx-2.8.5-1.2.101mdk.src.rpm

 Mandriva Linux 10.1/X86_64:
 db1f977046a8e8abd7d45d7345fde701  x86_64/10.1/RPMS/lynx-2.8.5-1.2.101mdk.x86_64.rpm
 13e5e506a05b448426d639d5e88a8896  x86_64/10.1/SRPMS/lynx-2.8.5-1.2.101mdk.src.rpm

 Corporate 3.0:
 a8ab3968700c864e01df9c74ccb017ca  corporate/3.0/RPMS/lynx-2.8.5-1.2.C30mdk.i586.rpm
 221f02f4e097a52c261bb6b3bfc2bbab  corporate/3.0/SRPMS/lynx-2.8.5-1.2.C30mdk.src.rpm

 Corporate 3.0/X86_64:
 af94e8d31c6a756137dd04351ad61f08  x86_64/corporate/3.0/RPMS/lynx-2.8.5-1.2.C30mdk.x86_64.rpm
 221f02f4e097a52c261bb6b3bfc2bbab  x86_64/corporate/3.0/SRPMS/lynx-2.8.5-1.2.C30mdk.src.rpm

 Multi Network Firewall 2.0:
 6f0684f762fa2ac999d7ef2517525152  mnf/2.0/RPMS/lynx-2.8.5-1.2.M20mdk.i586.rpm
 13cad2c8ec6a61159e5b580758dad58b  mnf/2.0/SRPMS/lynx-2.8.5-1.2.M20mdk.src.rpm

 Mandriva Linux 10.2:
 d8007bd3e271f0f602babf443d9d2304  10.2/RPMS/lynx-2.8.5-1.2.102mdk.i586.rpm
 60109bc6dc9630175c87dd66c23a8e05  10.2/SRPMS/lynx-2.8.5-1.2.102mdk.src.rpm

 Mandriva Linux 10.2/X86_64:
 9ceb656aac6be9eb6af021a2bfd661a6  x86_64/10.2/RPMS/lynx-2.8.5-1.2.102mdk.x86_64.rpm
 60109bc6dc9630175c87dd66c23a8e05  x86_64/10.2/SRPMS/lynx-2.8.5-1.2.102mdk.src.rpm

 Mandriva Linux 2006.0:
 f7887db43f04613eef47a56fd175a1cb  2006.0/RPMS/lynx-2.8.5-4.2.20060mdk.i586.rpm
 b121d10b5f27c29b8096c64c6c4416bb  2006.0/SRPMS/lynx-2.8.5-4.2.20060mdk.src.rpm

 Mandriva Linux 2006.0/X86_64:
 55cbe960a042601656919aa944602de2  x86_64/2006.0/RPMS/lynx-2.8.5-4.2.20060mdk.x86_64.rpm
 b121d10b5f27c29b8096c64c6c4416bb  x86_64/2006.0/SRPMS/lynx-2.8.5-4.2.20060mdk.src.rpm
 _______________________________________________________________________

 To upgrade automatically use MandrivaUpdate or urpmi.  The verification
 of md5 checksums and GPG signatures is performed automatically for you.

 All packages are signed by Mandriva for security.  You can obtain the
 GPG public key of the Mandriva Security Team by executing:

  gpg --recv-keys --keyserver pgp.mit.edu 0x22458A98

 You can view other update advisories for Mandriva Linux at:

  http://www.mandriva.com/security/advisories

 If you want to report vulnerabilities, please contact

  security_(at)_mandriva.com
 _______________________________________________________________________

 Type Bits/KeyID     Date       User ID
 pub  1024D/22458A98 2000-07-10 Mandriva Security Team
  <security*mandriva.com>
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