Debian Security Advisory

DLA-2278-1 squid3 -- LTS security update

Date Reported:
10 Jul 2020
Affected Packages:
Security database references:
In the Debian bugtracking system: Bug 950802, Bug 931478, Bug 950925, Bug 912294.
In Mitre's CVE dictionary: CVE-2018-19132, CVE-2019-12519, CVE-2019-12520, CVE-2019-12521, CVE-2019-12523, CVE-2019-12524, CVE-2019-12525, CVE-2019-12526, CVE-2019-12528, CVE-2019-12529, CVE-2019-13345, CVE-2019-18676, CVE-2019-18677, CVE-2019-18678, CVE-2019-18679, CVE-2019-18860, CVE-2020-8449, CVE-2020-8450, CVE-2020-11945.
More information:

It was found that Squid, a high-performance proxy caching server for web clients, has been affected by multiple security vulnerabilities. Due to incorrect input validation and URL request handling it was possible to bypass access restrictions for restricted HTTP servers and to cause a denial-of-service.

For Debian 9 stretch, these problems have been fixed in version 3.5.23-5+deb9u2.

We recommend that you upgrade your squid3 packages.

For the detailed security status of squid3 please refer to its security tracker page at:

Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: