DEBIAN-CVE-2019-12521
- Source
- https://security-tracker.debian.org/tracker/CVE-2019-12521
- Import Source
- https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2019-12521.json
- JSON Data
- https://api.osv.dev/v1/vulns/DEBIAN-CVE-2019-12521
- Upstream
- Published
- 2020-04-15T19:15:12Z
- Modified
- 2025-09-30T03:54:22Z
- Severity
-
- 5.9 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
- Summary
- [none]
- Details
-
An issue was discovered in Squid through 4.7. When Squid is parsing ESI, it keeps the ESI elements in ESIContext. ESIContext contains a buffer for holding a stack of ESIElements. When a new ESIElement is parsed, it is added via addStackElement. addStackElement has a check for the number of elements in this buffer, but it's off by 1, leading to a Heap Overflow of 1 element. The overflow is within the same structure so it can't affect adjacent memory blocks, and thus just leads to a crash while processing.
- References
Affected packages
Debian:11 / squid
Package
- Name
- squid
- Purl
- pkg:deb/debian/squid?arch=source
Debian:12 / squid
Package
- Name
- squid
- Purl
- pkg:deb/debian/squid?arch=source
Debian:13 / squid
Package
- Name
- squid
- Purl
- pkg:deb/debian/squid?arch=source
Debian:14 / squid
Package
- Name
- squid
- Purl
- pkg:deb/debian/squid?arch=source