An issue was discovered in Squid 3.3.9 through 3.5.28 and 4.x through 4.7. When
Squid is configured to use Digest authentication, it parses the header
Proxy-Authorization. It searches for certain tokens such as domain, uri, and
qop. Squid checks if this token's value starts with a quote and ends with one.
If so, it performs a memcpy of its length minus 2. Squid never checks whether
the value is just a single quote (which would satisfy its requirements), leading
to a memcpy of its length minus 1.
Created squid tracking bugs for this issue:
Affects: fedora-all [bug 1730536]
Remove 'auth_param digest ...' configuration settings from squid.conf.
upstream fixes :
Squid 3.5: http://www.squid-cache.org/Versions/v3/3.5/changesets/squid-3.5-ec0d0f39cf28da14eead0ba5e777e95855bc2f67.patch
Squid 4: http://www.squid-cache.org/Versions/v4/changesets/squid-4-409956536647b3a05ee1e367424a24ae6b8f13fd.patch