Advisories
Mandriva Advisories
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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.
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.
| Updated Packages |
Mandrakelinux 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
Mandrakelinux 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 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
Corporate Server 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 Server 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 LE2005
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 LE2005/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
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/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
| References |
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-3120
| Upgrade |
To upgrade automatically, use MandrivaUpdate.
| Verification |
Please verify the update prior to upgrading to ensure the integrity of the downloaded package. You can do this with the command :
rpm --checksig package.rpm
You can get the GPG public key of the Mandriva Security Team to verify the GPG signature of each RPM.
If you use MandrivaUpdate, the verification of md5 checksum and GPG signature is performed automatically for you.