Out-of-bounds Write Affecting squid:4/libecap package, versions <0:1.0.1-2.module_el8.6.0+2741+01592ae8


Severity

Recommended
high

Based on AlmaLinux security rating.

Threat Intelligence

EPSS
6.34% (91st percentile)

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  • Snyk IDSNYK-ALMALINUX8-SQUID-5622470
  • published28 May 2023
  • disclosed6 May 2020

Introduced: 6 May 2020

CVE-2019-12519  (opens in a new tab)
CWE-787  (opens in a new tab)

How to fix?

Upgrade AlmaLinux:8 squid:4/libecap to version 0:1.0.1-2.module_el8.6.0+2741+01592ae8 or higher.
This issue was patched in ALSA-2020:2041.

NVD Description

Note: Versions mentioned in the description apply only to the upstream squid:4/libecap package and not the squid:4/libecap package as distributed by AlmaLinux. See How to fix? for AlmaLinux:8 relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1