USN-904-1: Squid vulnerability

Ubuntu Security Notice USN-904-1

24th February, 2010

squid vulnerability

A security issue affects these releases of Ubuntu and its derivatives:

  • Ubuntu 9.10
  • Ubuntu 9.04
  • Ubuntu 8.10
  • Ubuntu 8.04 LTS

Software description

  • squid


It was discovered that Squid incorrectly handled certain malformed packets
received on the HTCP port. A remote attacker could exploit this with a
specially-crafted packet and cause Squid to crash, resulting in a denial of

Update instructions

The problem can be corrected by updating your system to the following package version:

Ubuntu 9.10:
squid 2.7.STABLE6-2ubuntu2.2
Ubuntu 9.04:
squid 2.7.STABLE3-4.1ubuntu1.2
Ubuntu 8.10:
squid 2.7.STABLE3-1ubuntu2.3
Ubuntu 8.04 LTS:
squid 2.6.18-1ubuntu3.2

To update your system, please follow these instructions:

In general, a standard system upgrade is sufficient to effect the
necessary changes.