squid -- several remote denial of service vulnerabilities

Squid security advisory 2009:2 reports:

Due to incorrect buffer limits and related bound checks Squid is vulnerable to a denial of service attack when processing specially crafted requests or responses.

Due to incorrect data validation Squid is vulnerable to a denial of service attack when processing specially crafted responses.

These problems allow any trusted client or external server to perform a denial of service attack on the Squid service.

[source]

Squid-2.x releases are not affected.