CVE-2019-12525
8Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackepss 24%
exploitation probability
24%top 2% of all CVEs
observed exploitation
nono source reports it
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.
Affected products
n/a · n/aReferences
http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00053.htmlhttp://lists.opensuse.org/opensuse-security-announce/2019-11/msg00056.htmlhttps://github.com/squid-cache/squid/commits/v4https://lists.debian.org/debian-lts-announce/2019/07/msg00018.htmlhttps://lists.debian.org/debian-lts-announce/2020/07/msg00009.htmlhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SPXN2CLAGN5QSQBTOV5IGVLDOQSRFNTZ/https://seclists.org/bugtraq/2019/Aug/42https://usn.ubuntu.com/4065-1/https://usn.ubuntu.com/4065-2/https://www.debian.org/security/2019/dsa-4507http://www.squid-cache.org/Versions/v4/changesets/http://www.squid-cache.org/Versions/v4/changesets/squid-4-7f73e9c5d17664b882ed32590e6af310c247f320.patch