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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2021-27291 Detail

Description

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.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
https://gist.github.com/b-c-ds/b1a2cc0c68a35c57188575eb496de5ce CVE, MITRE Exploit  Third Party Advisory 
https://github.com/pygments/pygments/commit/2e7e8c4a7b318f4032493773732754e418279a14 CVE, MITRE Patch  Third Party Advisory 
https://lists.debian.org/debian-lts-announce/2021/03/msg00024.html CVE, MITRE Mailing List  Third Party Advisory 
https://lists.debian.org/debian-lts-announce/2021/05/msg00003.html CVE, MITRE Mailing List  Third Party Advisory 
https://lists.debian.org/debian-lts-announce/2021/05/msg00006.html CVE, MITRE Mailing List  Third Party Advisory 
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GSJRFHALQ7E3UV4FFMFU2YQ6LUDHAI55/ CVE, MITRE
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WSLD67LFGXOX2K5YNESSWAS4AGZIJTUQ/ CVE, MITRE
https://www.debian.org/security/2021/dsa-4878 CVE, MITRE Third Party Advisory 
https://www.debian.org/security/2021/dsa-4889 CVE, MITRE Third Party Advisory 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-1333 Inefficient Regular Expression Complexity cwe source acceptance level NIST  

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Change History

12 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2021-27291
NVD Published Date:
03/17/2021
NVD Last Modified:
11/21/2024
Source:
MITRE