CVE Vulnerability

CVE-2021-27291

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.

5 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 10 / Impact : 2.9

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact PARTIAL

Scope

7.5 /10

CVSS v3.0 : HIGH

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

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://www.debian.org/security/2021/dsa-4878 Third Party Advisory
https://www.debian.org/security/2021/dsa-4889 Third Party Advisory
https://lists.debian.org/debian-lts-announce/2021/05/msg00003.html Mailing List Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WSLD67LFGXOX2K5YNESSWAS4AGZIJTUQ/ Mailing List Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GSJRFHALQ7E3UV4FFMFU2YQ6LUDHAI55/ Mailing List Third Party Advisory
https://lists.debian.org/debian-lts-announce/2021/05/msg00006.html Mailing List Third Party Advisory
Configurations

Configuration 1

cpe:2.3:a:pygments:pygments:*:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*
Information

Published : 2021-03-17 01:15

Updated : 2022-05-23 10:35

NVD link : CVE-2021-27291

Mitre link : CVE-2021-27291

Products Affected
No products.
CWE
NVD-CWE-Other