[CLA-2002:506] Conectiva Linux Security Announcement - squid
Date: Fri, 5 Jul 2002 11:45:23 -0300
From: secure@conectiva.com.br
To: conectiva-updates@papaleguas.conectiva.com.br, lwn@lwn.net,
Subject: [CLA-2002:506] Conectiva Linux Security Announcement - squid
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CONECTIVA LINUX SECURITY ANNOUNCEMENT
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PACKAGE : squid
SUMMARY : Several vulnerabilities
DATE : 2002-07-05 11:42:00
ID : CLA-2002:506
RELEVANT
RELEASES : 6.0, 7.0, 8
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DESCRIPTION
Squid is a caching/proxy daemon for HTTP, FTP and gopher.
The squid team released squid 2.4.stable7 which fixes a number of
remote vulnerabilities[1] in previous versions:
- Gopher client buffer overflows[2]
- FTP directory parsing buffer overflow[3]
- FTP data channel sanity check[4]
- Proxy authentication credentials forward[5]
An attacker can exploit some of these vulnerabilities to execute
arbitrary code remotely as the user running squid (which in Conectiva
Linux is "proxy" or "nobody"), cause a Denial-of-Service (DoS) in the
server or inject/get invalid data in/from the network.
This new release also drops any requests using transfer-encoding[6]
in order to avoid exploits of a known issue[7] in vulnerable apache
web servers. This does not affect the functionality of squid since it
is a HTTP/1.0 proxy and as such it does not support transfer-encoding
requests.
SOLUTION
It is recommended that all squid users upgrade to the latest
packages. This update will automatically restart the service if it is
already running.
REFERENCES:
1.http://www.squid-cache.org/Advisories/SQUID-2002_3.txt
2.http://www.squid-cache.org/Versions/v2/2.4/bugs/#squid-2.4.STABLE6-gopher
3.http://www.squid-cache.org/Versions/v2/2.4/bugs/#squid-2.4.STABLE6-ftp_directories
4.http://www.squid-cache.org/Versions/v2/2.4/bugs/#squid-2.4.STABLE6-ftp_sanitycheck
5.http://www.squid-cache.org/Versions/v2/2.4/bugs/#squid-2.4.STABLE6-proxy_auth
6.http://www.squid-cache.org/Versions/v2/2.4/bugs/#squid-2.4.STABLE6-deny_transfer_encoding
7.http://distro.conectiva.com.br/atualizacoes/?id=a&anuncio=000498&idioma=en
DIRECT DOWNLOAD LINKS TO THE UPDATED PACKAGES
ftp://atualizacoes.conectiva.com.br/6.0/RPMS/squid-2.4.7-1U60_3cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/6.0/SRPMS/squid-2.4.7-1U60_3cl.src.rpm
ftp://atualizacoes.conectiva.com.br/7.0/RPMS/squid-2.4.7-1U70_3cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/7.0/RPMS/squid-auth-2.4.7-1U70_3cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/7.0/RPMS/squid-doc-2.4.7-1U70_3cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/7.0/RPMS/squid-templates-2.4.7-1U70_3cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/7.0/SRPMS/squid-2.4.7-1U70_3cl.src.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/squid-2.4.7-1U8_3cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/squid-auth-2.4.7-1U8_3cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/squid-doc-2.4.7-1U8_3cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/squid-templates-2.4.7-1U8_3cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/SRPMS/squid-2.4.7-1U8_3cl.src.rpm
ADDITIONAL INSTRUCTIONS
Users of Conectiva Linux version 6.0 or higher may use apt to perform
upgrades of RPM packages:
- add the following line to /etc/apt/sources.list if it is not there yet
(you may also use linuxconf to do this):
rpm [cncbr] ftp://atualizacoes.conectiva.com.br 6.0/conectiva updates
(replace 6.0 with the correct version number if you are not running CL6.0)
- 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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