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CVE-2021-39917

Date: December 13, 2021

An issue has been discovered in GitLab CE/EE affecting all versions starting from 12.9 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 related to quick actions features was susceptible to catastrophic backtracking that could cause a DOS attack.

Severity Score

Related Resources (6)

https://hackerone.com/reports/1277918
https://people.canonical.com/~ubuntu-security/cve/CVE-2021-39917
https://gitlab.com/gitlab-org/gitlab/-/issues/338486
https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39917.json
https://nvd.nist.gov/vuln/detail/CVE-2021-39917
https://www.mend.io/vulnerability-database/CVE-2021-39917

Severity Score

Weakness Type (CWE)

Incorrect Comparison

CWE-697

CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): LOW
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): LOW

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): LOW
Authentication (AU): SINGLE
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): PARTIAL
Additional information:

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