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.

The version of GitLab installed on the remote host is affected by a vulnerability, as follows:

  - 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. (CVE-2021-39933)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The version of FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by multiple vulnerabilities as referenced in the b299417a-5725-11ec-a587-001b217b3468 advisory.

  - Improper access control in the GitLab CE/EE API affecting all versions starting from 9.4 before 14.3.6,     all versions starting from 14.4 before 14.4.4, all versions starting from 14.5 before 14.5.2, allows an     author of a Merge Request to approve the Merge Request even after having their project access revoked     (CVE-2021-39945)

  - An issue has been discovered in GitLab CE/EE affecting all versions starting from 12.6 before 14.3.6, all     versions starting from 14.4 before 14.4.4, all versions starting from 14.5 before 14.5.2. GitLab was     vulnerable to HTML Injection through the Swagger UI feature. (CVE-2021-39910)

  - Improper access control in the GraphQL API in GitLab CE/EE affecting all versions starting from 13.0     before 14.3.6, all versions starting from 14.4 before 14.4.4, all versions starting from 14.5 before     14.5.2, allows an attacker to see the names of project access tokens on arbitrary projects     (CVE-2021-39915)

  - Lack of an access control check in the External Status Check feature allowed any authenticated user to     retrieve the configuration of any External Status Check in GitLab EE starting from 14.1 before 14.3.6, all     versions starting from 14.4 before 14.4.4, all versions starting from 14.5 before 14.5.2. (CVE-2021-39916)

  - 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. (CVE-2021-39917)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Severity
187542	GitLab 12.10 < 14.3.6 / 14.4 < 14.4.4 / 14.5 < 14.5.2 (CVE-2021-39933)	Nessus	CGI abuses	medium
156031	FreeBSD : Gitlab -- Multiple Vulnerabilities (b299417a-5725-11ec-a587-001b217b3468)	Nessus	FreeBSD Local Security Checks	high

Detections

Analytics

CVE-2021-39933

medium

Tenable Plugins

medium

high