Squid 3.1.x < 3.1.16 / 3.2.x < 220.127.116.11 DNS Replies CName Record Parsing Remote DoS
Medium Nessus Plugin ID 57287
SynopsisThe remote proxy server is affected by a denial of service vulnerability.
DescriptionAccording to its banner, the version of Squid is 3.1.x earlier than than 3.1.16 or 3.2.x earlier than 18.104.22.168. Such versions are affected by a denial of service vulnerability.
The application does not properly free memory when handling DNS replies containing a CNAME record that references another CNAME record that contains an empty A record.
Note that Nessus has relied only on the version in the proxy server's banner, which is not updated by the patch that the project has released to address the issue. If the patch has been applied properly and the service restarted, consider this to be a false positive.
SolutionUpgrade to Squid version 3.1.16 / 22.214.171.124 or later.