Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Squid-Cache | Squid | >= 3.0, <= 3.5.28 |
| Canonical | Ubuntu Linux | 16.04 |
| Fedoraproject | Fedora | 30 |
| Debian | Debian Linux | 9.0 |
Related Weaknesses (CWE)
References
- http://www.squid-cache.org/Advisories/SQUID-2019_8.txtThird Party Advisory
- http://www.squid-cache.org/Versions/v4/changesets/squid-4-fbbdf75efd7a5cc244b488Patch
- https://bugzilla.suse.com/show_bug.cgi?id=1156329Issue TrackingThird Party Advisory
- https://github.com/squid-cache/squid/pull/275PatchThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/07/msg00009.htmlMailing ListThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://usn.ubuntu.com/4213-1/Third Party Advisory
- https://usn.ubuntu.com/4446-1/Third Party Advisory
- https://www.debian.org/security/2020/dsa-4682Third Party Advisory
- http://www.squid-cache.org/Advisories/SQUID-2019_8.txtThird Party Advisory
- http://www.squid-cache.org/Versions/v4/changesets/squid-4-fbbdf75efd7a5cc244b488Patch
- https://bugzilla.suse.com/show_bug.cgi?id=1156329Issue TrackingThird Party Advisory
- https://github.com/squid-cache/squid/pull/275PatchThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/07/msg00009.htmlMailing ListThird Party Advisory
FAQ
What is CVE-2019-18676?
CVE-2019-18676 is a vulnerability with a CVSS score of 7.5 (HIGH). 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. ...
How severe is CVE-2019-18676?
CVE-2019-18676 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2019-18676?
Check the references section above for vendor advisories and patch information. Affected products include: Squid-Cache Squid, Canonical Ubuntu Linux, Fedoraproject Fedora, Debian Debian Linux.