CVE-2019-12526
CRITICAL severity · CVSS 9.8 · Out-of-bounds write
9.8CVSS CRITICAL
Summary
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.
Impact & exploitability
Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
Confidentiality impactHigh
Integrity impactHigh
Availability impactHigh
Exploit probability (EPSS)20%
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected products we track (1)
Recommendation
Apply the vendor fix promptly. Open any affected product above for its exact safe version.
Additional information
- NVD record
- http://www.squid-cache.org/Advisories/SQUID-2019_7.txtAdvisory
- https://bugzilla.suse.com/show_bug.cgi?id=1156326Advisory
- https://lists.debian.org/debian-lts-announce/2019/12/msg00011.htmlAdvisory
- https://lists.debian.org/debian-lts-announce/2020/07/msg00009.htmlAdvisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MTM74TU2BSLT5B3H4F3UDW53672NVLMC/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UEMOYTMCCFWK5NOXSXEIH5D2VGWVXR67/
- https://security.gentoo.org/glsa/202003-34Advisory
- https://usn.ubuntu.com/4213-1/Advisory