CVE-2019-12526

Description

An issue was discovered in Squid before 4.9. URN response handling in Squid suffers from a heap-based buffer overflow. When receiving data from a remote server in response to an URN request, Squid fails to ensure that the response can fit within the buffer. This leads to attacker controlled data overflowing in the heap.

Category

9.8
CVSS
Severity: Critical
CVSS 3.1 •
CVSS 2.0 •
EPSS 33.45% Top 5%
Vendor Advisory ubuntu.com Vendor Advisory fedoraproject.org Vendor Advisory fedoraproject.org Vendor Advisory gentoo.org Vendor Advisory debian.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://bugzilla.suse.com/show_bug.cgi?id=1156326 issue tracking third party advisory
http://www.squid-cache.org/Advisories/SQUID-2019_7.txt third party advisory
https://usn.ubuntu.com/4213-1/ third party advisory vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UEMOYTMCCFWK5NOXSXEIH5D2VGWVXR67/ vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MTM74TU2BSLT5B3H4F3UDW53672NVLMC/ vendor advisory
https://lists.debian.org/debian-lts-announce/2019/12/msg00011.html third party advisory mailing list
https://security.gentoo.org/glsa/202003-34 third party advisory vendor advisory
https://www.debian.org/security/2020/dsa-4682 third party advisory vendor advisory
https://lists.debian.org/debian-lts-announce/2020/07/msg00009.html third party advisory mailing list

Frequently Asked Questions

What is the severity of CVE-2019-12526?
CVE-2019-12526 has been scored as a critical severity vulnerability.
How to fix CVE-2019-12526?
To fix CVE-2019-12526, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2019-12526 being actively exploited in the wild?
It is possible that CVE-2019-12526 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~33% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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