---
cve: "CVE-2019-12519"
severity: "LOW"
cvss: 3.1
epss: "6.6%"
vendor: "n/a"
kev: false
exploited: false
published: "2020-04-15 20:15:13"
tags: [cve, security, low]
source: tsecurity.de CVE-Dossier
exported: "2026-09-18T05:42:50+02:00"
---

# CVE-2019-12519

> 3.1 LOW

## Beschreibung

An issue was discovered in Squid through 4.7. When handling the tag esi:when when ESI is enabled, Squid calls ESIExpression::Evaluate. This function uses a fixed stack buffer to hold the expression while it's being evaluated. When processing the expression, it could either evaluate the top of the stack, or add a new member to the stack. When adding a new member, there is no check to ensure that the stack won't overflow.

## Referenzen

- <https://gitlab.com/jeriko.one/security/-/blob/master/squid/CVEs/CVE-2019-12519.txt>
- <http://www.openwall.com/lists/oss-security/2020/04/23/1>
- <https://www.debian.org/security/2020/dsa-4682>
- <http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00018.html>
- <https://security.gentoo.org/glsa/202005-05>
- <https://usn.ubuntu.com/4356-1/>
- <https://lists.debian.org/debian-lts-announce/2020/07/msg00009.html>
- <https://security.netapp.com/advisory/ntap-20210205-0006/>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2019-12519) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_