CVE-2019-12525: Critical severity Squid-Cache Squid vulnerability
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 Software
Remediation
Patch Available
Event History
Frequently Asked Questions
What is the vulnerability ID?
The vulnerability ID is CVE-2019-12525.
What is the severity of CVE-2019-12525?
CVE-2019-12525 has a severity value of 9.8, which is considered critical.
Which software versions are affected by CVE-2019-12525?
Squid versions 3.3.9 through 3.5.28 and 4.x through 4.7 are affected by CVE-2019-12525.
How does CVE-2019-12525 impact Squid when using Digest authentication?
CVE-2019-12525 impacts Squid when configured to use Digest authentication by parsing the Proxy-Authorization header and searching for certain tokens.
Is there a fix available for CVE-2019-12525?
Yes, remedies and updates are available for different affected software versions of Squid. Please refer to the provided references for more information on how to fix CVE-2019-12525.