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CONECTIVA LINUX SECURITY ANNOUNCEMENT
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PACKAGE : lynx
SUMMARY : CRLF injection local vulnerability
DATE : 2003-08-11 18:47:00
ID : CLA-2003:720
RELEVANT
RELEASES : 7.0, 8

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DESCRIPTION
Lynx is a text terminal based web browser.

Ulf Harnhammar reported[1] a CRLF (Carriage Return, Line Feed)
injection vulnerability in lynx. When handling a URL supplied through
the command line, lynx does not filter out characters such as spaces,
CR, LF, etc, which allows an attacker to inject HTTP headers and
cause program misbehavior[2] by using a specially crafted URL.

The Common Vulnerabilities and Exposures project (cve.mitre.org) has
assigned the name CAN-2002-1405 to this issue[3].

The package distributed with Conectiva Linux 9 (lynx-2.8.4-25963cl)
already contains a fix and is not vulnerable to this problem.

SOLUTION
All lynx users should upgrade.


REFERENCES:
1.http://marc.theaimsgroup.com/?l=bugtraq&m=102978118411977&w=2
2.http://marc.theaimsgroup.com/?l=bugtraq&m=103003793418021&w=2
3.http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2002-1405

UPDATED PACKAGES
ftp://atualizacoes.conectiva.com.br/7.0/RPMS/lynx-2.8.4-1U70_1cl.i386.rp
m
ftp://atualizacoes.conectiva.com.br/7.0/RPMS/lynx-doc-2.8.4-1U70_1cl.i38
6.rpm
ftp://atualizacoes.conectiva.com.br/7.0/SRPMS/lynx-2.8.4-1U70_1cl.src.rp
m
ftp://atualizacoes.conectiva.com.br/8/RPMS/lynx-2.8.4-4U80_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/lynx-doc-2.8.4-4U80_1cl.i386.
rpm
ftp://atualizacoes.conectiva.com.br/8/SRPMS/lynx-2.8.4-4U80_1cl.src.rpm

ADDITIONAL INSTRUCTIONS
The apt tool can be used to perform RPM packages upgrades:

- run: apt-get update
- after that, execute: apt-get upgrade

Detailed instructions reagarding the use of apt and upgrade examples
can be found at http://distro.conectiva.com.br/atualizacoes/#apt?idioma=en

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All packages are signed with Conectiva's GPG key. The key and instructions
on how to import it can be found at
http://distro.conectiva.com.br/seguranca/chave/?idioma=en
Instructions on how to check the signatures of the RPM packages can be
found at http://distro.conectiva.com.br/seguranca/politica/?idioma=en

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All our advisories and generic update instructions can be viewed at
http://distro.conectiva.com.br/atualizacoes/?idioma=en

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Copyright (c) 2003 Conectiva Inc.
http://www.conectiva.com

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