Due to incorrect string termination, Squid cachemgr.cgi 4.0 through 4.7 may access unallocated memory. On systems with memory access protections, this can cause the CGI process to terminate unexpectedly, resulting in a denial of service for all clients using it.
lists.opensuse.org/opensuse-security-announce/2019-11/msg00053.html
lists.opensuse.org/opensuse-security-announce/2019-11/msg00056.html
www.squid-cache.org/Advisories/SQUID-2019_1.txt
www.squid-cache.org/Versions/v4/changesets/squid-4-2981a957716c61ff7e21eee1d7d6eb5a237e466d.patch
bugs.squid-cache.org/show_bug.cgi?id=4937
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SPXN2CLAGN5QSQBTOV5IGVLDOQSRFNTZ/
seclists.org/bugtraq/2019/Aug/42
usn.ubuntu.com/4213-1/
www.debian.org/security/2019/dsa-4507