Out-of-bounds Write Affecting php-xml-debuginfo package, versions <0:7.4.19-2.module+el8.6.0+789+2130c178


Severity

Recommended
medium

Based on Rocky Linux security rating.

Threat Intelligence

EPSS
0.15% (53rd percentile)

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  • Snyk IDSNYK-ROCKY8-PHPXMLDEBUGINFO-3199489
  • published5 Jan 2023
  • disclosed25 Oct 2021

Introduced: 25 Oct 2021

CVE-2021-21703  (opens in a new tab)
CWE-787  (opens in a new tab)

How to fix?

Upgrade Rocky-Linux:8 php-xml-debuginfo to version 0:7.4.19-2.module+el8.6.0+789+2130c178 or higher.
This issue was patched in RLSA-2022:1935.

NVD Description

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

In PHP versions 7.3.x up to and including 7.3.31, 7.4.x below 7.4.25 and 8.0.x below 8.0.12, when running PHP FPM SAPI with main FPM daemon process running as root and child worker processes running as lower-privileged users, it is possible for the child processes to access memory shared with the main process and write to it, modifying it in a way that would cause the root process to conduct invalid memory reads and writes, which can be used to escalate privileges from local unprivileged user to the root user.

CVSS Scores

version 3.1