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 |
---|---|
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 |
History
No history.
MITRE Information
Status: PUBLISHED
Assigner: mitre
Published: 2021-03-17T12:31:15
Updated: 2021-05-06T22:06:22
Reserved: 2021-02-16T00:00:00
Link: CVE-2021-27291
JSON object: View
NVD Information
Status : Modified
Published: 2021-03-17T13:15:15.137
Modified: 2023-11-07T03:31:56.783
Link: CVE-2021-27291
JSON object: View
Redhat Information
No data.
CWE