CVE-2019-12854

Name: CVE-2019-12854
Creator: NVD / NIST
Published: 2019-08-15T17:15:12.753+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 11.71%

Last modified Jun 17, 2026

CVE-2019-12854 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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.. EPSS estimates a 11.71% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

11.71%

95.5th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Squid-Cache	Squid	>= 4.0, <= 4.7
Debian	Debian Linux	10.0
Fedoraproject	Fedora	29
Canonical	Ubuntu Linux	16.04
Canonical	Ubuntu Linux	18.04
Canonical	Ubuntu Linux	19.04
Canonical	Ubuntu Linux	19.10
Opensuse	Leap	15.0
Opensuse	Leap	15.1

References

http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00053.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00056.htmlMailing List, Third Party Advisory
http://www.squid-cache.org/Advisories/SQUID-2019_1.txtVendor Advisory
http://www.squid-cache.org/Versions/v4/changesets/squid-4-2981a957716c61ff7e21eee1d7d6eb5a237e466d.patchPatch, Vendor Advisory
https://bugs.squid-cache.org/show_bug.cgi?id=4937Vendor Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SPXN2CLAGN5QSQBTOV5IGVLDOQSRFNTZ/
https://seclists.org/bugtraq/2019/Aug/42Mailing List, Third Party Advisory
https://usn.ubuntu.com/4213-1/Third Party Advisory
https://www.debian.org/security/2019/dsa-4507Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00053.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00056.htmlMailing List, Third Party Advisory
http://www.squid-cache.org/Advisories/SQUID-2019_1.txtVendor Advisory
http://www.squid-cache.org/Versions/v4/changesets/squid-4-2981a957716c61ff7e21eee1d7d6eb5a237e466d.patchPatch, Vendor Advisory
https://bugs.squid-cache.org/show_bug.cgi?id=4937Vendor Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SPXN2CLAGN5QSQBTOV5IGVLDOQSRFNTZ/
https://seclists.org/bugtraq/2019/Aug/42Mailing List, Third Party Advisory
https://usn.ubuntu.com/4213-1/Third Party Advisory
https://www.debian.org/security/2019/dsa-4507Third Party Advisory

Timeline

Published: Aug 15, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-12854?

How severe is CVE-2019-12854?

CVE-2019-12854 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 11.71% probability of exploitation in the next 30 days.

How do I fix CVE-2019-12854?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-12854?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST