Synopsis
The remote proxy server is affected by a denial of service vulnerability.
Description
According to its banner, the version of Squid running on the remote host is 3.2.x after or equal to 3.2.0.10, 3.3.x, 3.4.x, 3.5.x prior or equal to 3.5.28, or 4.x prior to 4.4. It is, therefore, affected by a denial of service (DoS) vulnerability in the SNMP component due to a memory leak in SNMP query rejection code. An unauthenticated, remote attacker can exploit this issue to consume all memory available to the Squid process, causing it to crash.
Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.
Solution
Upgrade to Squid version 4.4 or later. Alternatively, apply the vendor-supplied patch.