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.
References
Link | Resource |
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https://gist.github.com/b-c-ds/b1a2cc0c68a35c57188575eb496de5ce | Exploit Third Party Advisory |
https://github.com/pygments/pygments/commit/2e7e8c4a7b318f4032493773732754e418279a14 | Patch Third Party Advisory |
https://lists.debian.org/debian-lts-announce/2021/03/msg00024.html | Mailing List Third Party Advisory |
https://lists.debian.org/debian-lts-announce/2021/05/msg00003.html | Mailing List Third Party Advisory |
https://lists.debian.org/debian-lts-announce/2021/05/msg00006.html | Mailing List Third Party Advisory |
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GSJRFHALQ7E3UV4FFMFU2YQ6LUDHAI55/ | |
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WSLD67LFGXOX2K5YNESSWAS4AGZIJTUQ/ | |
https://www.debian.org/security/2021/dsa-4878 | Third Party Advisory |
https://www.debian.org/security/2021/dsa-4889 | Third Party Advisory |
Configurations
Configuration 1 (hide)
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Configuration 2 (hide)
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Configuration 3 (hide)
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History
07 Nov 2023, 03:31
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References |
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08 Aug 2023, 14:22
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CWE | CWE-1333 |
Information
Published : 2021-03-17 13:15
Updated : 2024-02-28 18:08
NVD link : CVE-2021-27291
Mitre link : CVE-2021-27291
CVE.ORG link : CVE-2021-27291
JSON object : View
Products Affected
fedoraproject
- fedora
pygments
- pygments
debian
- debian_linux
CWE
CWE-1333
Inefficient Regular Expression Complexity