Inefficient Regular Expression Complexity Affecting python3-pygments package, versions <0:2.2.0-22.module+el8.5.0+20329+5c5719bc


Severity

Recommended
medium

Based on Oracle Linux security rating.

Threat Intelligence

EPSS
3.91% (90th percentile)

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  • Snyk IDSNYK-ORACLE8-PYTHON3PYGMENTS-2591980
  • published10 Apr 2022
  • disclosed17 Mar 2021

Introduced: 17 Mar 2021

CVE-2021-27291  (opens in a new tab)
CWE-1333  (opens in a new tab)

How to fix?

Upgrade Oracle:8 python3-pygments to version 0:2.2.0-22.module+el8.5.0+20329+5c5719bc or higher.
This issue was patched in ELSA-2021-4150.

NVD Description

Note: Versions mentioned in the description apply only to the upstream python3-pygments package and not the python3-pygments package as distributed by Oracle. See How to fix? for Oracle:8 relevant fixed versions and status.

In pygments 1.1+, fixed in 2.7.4, the lexers used to parse programming languages rely heavily on regular expressions. Some of the regular expressions have exponential or cubic worst-case complexity and are vulnerable to ReDoS. By crafting malicious input, an attacker can cause a denial of service.

CVSS Base Scores

version 3.1