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Home » Hacking News » CLA-2002:506-squid

CLA-2002:506-squid

by Nikola Strahija on July 5th, 2002 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


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

- -------------------------------------------------------------------------
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