Use After Free Affecting php-pecl-zip-debugsource package, versions <0:1.19.2-1.module+el8.6.0+790+fc63e43f


Severity

Recommended
medium

Based on Rocky Linux security rating.

Threat Intelligence

EPSS
0.44% (76th percentile)

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  • Snyk IDSNYK-ROCKY8-PHPPECLZIPDEBUGSOURCE-3195434
  • published5 Jan 2023
  • disclosed27 Feb 2022

Introduced: 27 Feb 2022

CVE-2021-21708  (opens in a new tab)
CWE-416  (opens in a new tab)

How to fix?

Upgrade Rocky-Linux:8 php-pecl-zip-debugsource to version 0:1.19.2-1.module+el8.6.0+790+fc63e43f or higher.
This issue was patched in RLSA-2022:7624.

NVD Description

Note: Versions mentioned in the description apply only to the upstream php-pecl-zip-debugsource package and not the php-pecl-zip-debugsource package as distributed by Rocky-Linux. See How to fix? for Rocky-Linux:8 relevant fixed versions and status.

In PHP versions 7.4.x below 7.4.28, 8.0.x below 8.0.16, and 8.1.x below 8.1.3, when using filter functions with FILTER_VALIDATE_FLOAT filter and min/max limits, if the filter fails, there is a possibility to trigger use of allocated memory after free, which can result it crashes, and potentially in overwrite of other memory chunks and RCE. This issue affects: code that uses FILTER_VALIDATE_FLOAT with min/max limits.

CVSS Scores

version 3.1