Use After Free Affecting php-pear package, versions <1:1.10.13-1.module+el8.6.0+1006+0d5a469f


Severity

Recommended
medium

Based on Rocky Linux security rating.

Threat Intelligence

EPSS
3% (86th percentile)

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  • Snyk IDSNYK-ROCKY8-PHPPEAR-3271109
  • 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-pear to version 1:1.10.13-1.module+el8.6.0+1006+0d5a469f or higher.
This issue was patched in RLSA-2022:7624.

NVD Description

Note: Versions mentioned in the description apply only to the upstream php-pear package and not the php-pear 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 Base Scores

version 3.1