CVE-2021-39933 Information

Description

An issue has been discovered in GitLab CE/EE affecting all versions starting from 12.10 before 14.3.6 all versions starting from 14.4 before 14.4.4 all versions starting from 14.5 before 14.5.2. A regular expression used for handling user input (notes comments etc) was susceptible to catastrophic backtracking that could cause a DOS attack.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Reference

https://hackerone.com/reports/1320077 https://gitlab.com/gitlab-org/gitlab/-/issues/340449 https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39933.json

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

HIGH

Base Severity

6.5