CVE-2019-18676

Description

An issue was discovered in Squid 3.x and 4.x through 4.8. Due to incorrect input validation, there is a heap-based buffer overflow that can result in Denial of Service to all clients using the proxy. Severity is high due to this vulnerability occurring before normal security checks; any remote client that can reach the proxy port can trivially perform the attack via a crafted URI scheme.

References

https://bugzilla.suse.com/show_bug.cgi?id=1156329

http://www.squid-cache.org/Versions/v4/changesets/squid-4-fbbdf75efd7a5cc244b4886a9d42ea458c5a3a73.patch

http://www.squid-cache.org/Advisories/SQUID-2019_8.txt

https://github.com/squid-cache/squid/pull/275

https://usn.ubuntu.com/4213-1/

https://lists.fedoraproject.org/archives/list/[email protected]/message/UEMOYTMCCFWK5NOXSXEIH5D2VGWVXR67/

https://lists.fedoraproject.org/archives/list/[email protected]/message/MTM74TU2BSLT5B3H4F3UDW53672NVLMC/

https://www.debian.org/security/2020/dsa-4682

https://lists.debian.org/debian-lts-announce/2020/07/msg00009.html

https://usn.ubuntu.com/4446-1/

Details

Risk Information

CVSS v2

CVSS v3