According to its version number, the remote version of Squid is prone to a to a remote denial-of-service vulnerability because the proxy server fails to adequately bounds-check user-supplied data before copying it to an insufficiently sized buffer. Successfully exploiting this issue allows remote attackers to consume excessive memory, resulting in a denial-of-service condition. Note that to exploit this issue, an attacker must be a legitimate client user of the proxy. The Squid 3.x branch is vulnerable.
Upgrade to newer Version if available.