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Mageia 7: MGASA-2021-0245 Moderate: Python-Pygments ReDoS Issue

mageia
Calendar Grey June 13, 2021
Dist Mageia Esm H88
Recent updates to the python-pygments packages have addressed a ReDoS vulnerability impacting various versions. Discover further details!
In pygments 1.1+, fixed in 2.7.4, the lexers used to parse programming languages rely heavily on regular expressions

Summary

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 (CVE-2021-27291).

References

- https://bugs.mageia.org/show_bug.cgi?id=28982

- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/thread/GSJRFHALQ7E3UV4FFMFU2YQ6LUDHAI55/

- https://www.cve.org/CVERecord?id=CVE-2021-27291

Topics%20covered

Topics Covered

security advisory denial of service update mageia python-pygments ReDoS

Resolution

SRPMS

- 7/core/python-pygments-2.3.1-1.2.mga7

Severity
important
Lowest
Low
Medium
High
Critical

Publication date: 13 Jun 2021
URL: https://advisories.mageia.org/MGASA-2021-0245.html
Type: security
CVE: CVE-2021-27291

Topics%20covered

Topics Covered

security advisory denial of service update mageia python-pygments ReDoS

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