This script is Copyright (C) 2004-2015 Tenable Network Security, Inc.
The remote Gentoo host is missing one or more security-related
The remote host is affected by the vulnerability described in GLSA-200403-11
(Squid ACL [url_regex] bypass vulnerability)
A bug in Squid allows users to bypass certain access controls by passing a
URL containing '%00' which exploits the Squid decoding function.
This may insert a NUL character into decoded URLs, which may allow users to
bypass url_regex access control lists that are enforced upon them.
In such a scenario, Squid will insert a NUL character after
the'%00' and it will make a comparison between the URL to the end
of the NUL character rather than the contents after it: the comparison does
not result in a match, and the user's request is not denied.
Restricted users may be able to bypass url_regex access control lists that
are enforced upon them which may cause unwanted network traffic as well as
a route for other possible exploits. Users of Squid 2.5STABLE4 and below
who require the url_regex features are recommended to upgrade to 2.5STABLE5
to maintain the security of their infrastructure.
A workaround is not currently known for this issue. All users are advised
to upgrade to the latest version of Squid.
See also :
Squid can be updated as follows:
# emerge sync
# emerge -pv '>=net-proxy/squid-2.5.5'
# emerge '>=net-proxy/squid-2.5.5'
Risk factor :
High / CVSS Base Score : 7.5