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Conectiva Linux Advisory: squid

Jul 07, 2002, 04:02 (0 Talkback[s])
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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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