Use After Free Affecting php-pecl-rrd package, versions <0:2.0.3-1.module+el8.6.0+20568+84712317


Severity

Recommended
medium

Based on Oracle Linux security rating.

Threat Intelligence

EPSS
0.44% (76th percentile)

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  • Snyk IDSNYK-ORACLE8-PHPPECLRRD-3119156
  • published16 Nov 2022
  • 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 Oracle:8 php-pecl-rrd to version 0:2.0.3-1.module+el8.6.0+20568+84712317 or higher.
This issue was patched in ELSA-2022-7624.

NVD Description

Note: Versions mentioned in the description apply only to the upstream php-pecl-rrd package and not the php-pecl-rrd package as distributed by Oracle. See How to fix? for Oracle: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