MDKSA-2005:186 - Updated lynx packages fix remote buffer overflow
Posted on: 10/18/2005 02:52 PM

The Mandriva Security Team published a new security update: MDKSA-2005:186 - Updated lynx packages fix remote buffer overflow for Mandriva Linux. Here the announcement:

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Mandriva Linux Security Update Advisory
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Package name: lynx
Advisory ID: MDKSA-2005:186
Date: October 17th, 2005

Affected versions: 10.1, 10.2, 2006.0, Corporate 3.0,
Corporate Server 2.1,
Multi Network Firewall 2.0
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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.
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References:

http://cve.mitre.org/cgi-bin/cvename.cgi?nameƊN-2005-3120
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Updated Packages:

Mandrivalinux 10.1:
03a47f29118c2291a3bf9a355273560c 10.1/RPMS/lynx-2.8.5-1.1.101mdk.i586.rpm
0e7e4cd9c64861a7d0a284fb6b9be9e3 10.1/SRPMS/lynx-2.8.5-1.1.101mdk.src.rpm

Mandrivalinux 10.1/X86_64:
657c0cd7d9226c5b1f8b57c19e72f657 x86_64/10.1/RPMS/lynx-2.8.5-1.1.101mdk.x86_64.rpm
0e7e4cd9c64861a7d0a284fb6b9be9e3 x86_64/10.1/SRPMS/lynx-2.8.5-1.1.101mdk.src.rpm

Mandrivalinux 10.2:
e81251fccbdd21bdaebd963e6e2ed1d2 10.2/RPMS/lynx-2.8.5-1.1.102mdk.i586.rpm
6e5cceb1a9bdf36e7f8eab2ecc08799f 10.2/SRPMS/lynx-2.8.5-1.1.102mdk.src.rpm

Mandrivalinux 10.2/X86_64:
411f4dc65bf8c58a55a92cdb3be9ef53 x86_64/10.2/RPMS/lynx-2.8.5-1.1.102mdk.x86_64.rpm
6e5cceb1a9bdf36e7f8eab2ecc08799f x86_64/10.2/SRPMS/lynx-2.8.5-1.1.102mdk.src.rpm

Mandrivalinux 2006.0:
ee92cfae1cce73b8084cf6ad2c6d1381 2006.0/RPMS/lynx-2.8.5-4.1.20060mdk.i586.rpm
a022a76a884e198cf4f331a4d71c7d20 2006.0/SRPMS/lynx-2.8.5-4.1.20060mdk.src.rpm

Mandrivalinux 2006.0/X86_64:
46833e32f2c958d8fb544654efd4ab83 x86_64/2006.0/RPMS/lynx-2.8.5-4.1.20060mdk.x86_64.rpm
a022a76a884e198cf4f331a4d71c7d20 x86_64/2006.0/SRPMS/lynx-2.8.5-4.1.20060mdk.src.rpm

Multi Network Firewall 2.0:
f43a161be8fb6049d3f2361b5ead799a mnf/2.0/RPMS/lynx-2.8.5-1.1.M20mdk.i586.rpm
570c3679d4d38e62c21e570ab37f5bfe mnf/2.0/SRPMS/lynx-2.8.5-1.1.M20mdk.src.rpm

Corporate Server 2.1:
b18b5f89f3a8389362a9f67acfb87a2c corporate/2.1/RPMS/lynx-2.8.5-0.10.2.C21mdk.dev.8.i586.rpm
3d6af86d010f884152fd30f7fdd0bcb9 corporate/2.1/SRPMS/lynx-2.8.5-0.10.2.C21mdk.dev.8.src.rpm

Corporate Server 2.1/X86_64:
d4e5c0107a09cef8d142ca666d049303 x86_64/corporate/2.1/RPMS/lynx-2.8.5-0.10.2.C21mdk.dev.8.x86_64.rpm
3d6af86d010f884152fd30f7fdd0bcb9 x86_64/corporate/2.1/SRPMS/lynx-2.8.5-0.10.2.C21mdk.dev.8.src.rpm

Corporate 3.0:
970bef84ca43e8855569efad58455c47 corporate/3.0/RPMS/lynx-2.8.5-1.1.C30mdk.i586.rpm
c456757c4be351906911fc7827ffb348 corporate/3.0/SRPMS/lynx-2.8.5-1.1.C30mdk.src.rpm

Corporate 3.0/X86_64:
5df091387574a783a1a9cae4008f7dcb x86_64/corporate/3.0/RPMS/lynx-2.8.5-1.1.C30mdk.x86_64.rpm
c456757c4be351906911fc7827ffb348 x86_64/corporate/3.0/SRPMS/lynx-2.8.5-1.1.C30mdk.src.rpm
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To upgrade automatically use MandrakeUpdate 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
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Type Bits/KeyID Date User ID
pub 1024D/22458A98 2000-07-10 Mandriva Security Team
lt;security*mandriva.comgt;

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