===================================================================== CERT-Renater Note d'Information No. 2021/VULN641 _____________________________________________________________________ DATE : 07/12/2021 HARDWARE PLATFORM(S): / OPERATING SYSTEM(S): Systems running GitLab versions prior to 14.5.2, 14.4.4, 14.3.6. ===================================================================== https://about.gitlab.com/releases/2021/12/06/security-release-gitlab-14-5-2-released/ _____________________________________________________________________ GitLab Security Release: 14.5.2, 14.4.4, and 14.3.6 Learn more about GitLab Security Release: 14.5.2, 14.4.4, and 14.3.6 for GitLab Community Edition (CE) and Enterprise Edition (EE). Today we are releasing versions 14.5.2, 14.4.4, and 14.3.6 for GitLab Community Edition (CE) and Enterprise Edition (EE). These versions contain important security fixes, and we strongly recommend that all GitLab installations be upgraded to one of these versions immediately. GitLab.com is already running the patched version. GitLab releases patches for vulnerabilities in dedicated security releases. There are two types of security releases: a monthly, scheduled security release, released a week after the feature release (which deploys on the 22nd of each month), and ad-hoc security releases for critical vulnerabilities. For more information, you can visit our security FAQ. You can see all of our regular and security release blog posts here. In addition, the issues detailing each vulnerability are made public on our issue tracker 30 days after the release in which they were patched. We are dedicated to ensuring all aspects of GitLab that are exposed to customers or that host customer data are held to the highest security standards. As part of maintaining good security hygiene, it is highly recommended that all customers upgrade to the latest security release for their supported version. You can read more best practices in securing your GitLab instance in our blog post. Recommended Action We strongly recommend that all installations running a version affected by the issues described below are upgraded to the latest version as soon as possible. Table of Fixes Title Severity Group members with developer role can escalate their privilege to maintainer on projects that they import high When user registration is limited, external users that aren't developers shouldn't have access to the CI Lint API medium Collision in access memoization leads to potential elevated privileges on groups and projects medium Project access token names are returned for unauthenticated requesters medium Sensitive info disclosure in logs medium Disclosure of a user's custom project and group templates medium ReDoS in Maven package version medium Potential denial of service via the Diff feature medium Regular Expression Denial of Service via user comments medium Service desk email accessible by any project member medium Regular Expression Denial of Service via quick actions medium IDOR in "external status check" API leaks data about any status check on the instance medium Default branch name visible in public projects restricting access to the source code repository low Deploy token allows access to disabled project Wiki low Regular Expression Denial of Service via deploy Slash commands low Users can reply to Vulnerability Report discussions despite Only Project Members settings low Unauthorised deletion of protected branches low Author can approve Merge Request after having access revoked low HTML Injection via Swagger UI low Group members with developer role can escalate their privilege to maintainer on projects that they import An issue has been discovered in GitLab CE/EE affecting all versions starting from 11.0 before 14.3.6, all versions starting from 14.4 before 14.4.4, all versions starting from 14.5 before 14.5.2. A permissions validation flaw allowed group members with a developer role to elevate their privilege to a maintainer on projects they import. This is a high severity issue (CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N, 7.1). It is now mitigated in the latest release and is assigned CVE-2021-39944. Thanks @justas_b for reporting this vulnerability through our HackerOne bug bounty program. When user registration is limited, external users that aren't developers shouldn't have access to the CI Lint API An issue has been discovered in GitLab CE/EE affecting all versions starting from 10.5 before 14.3.6, all versions starting from 14.4 before 14.4.4, all versions starting from 14.5 before 14.5.2. Unauthorized external users could perform Server Side Requests via the CI Lint API. This is a medium severity issue (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C /C:H/I:N/A:N, 6.8). It is now mitigated in the latest release and is assigned CVE-2021-39935. Thanks @minhli for reporting this vulnerability through our HackerOne bug bounty program. Collision in access memoization leads to potential elevated privileges on groups and projects A collision in access memoization logic in all versions of GitLab CE/EE before 14.3.6, all versions starting from 14.4 before 14.4.4, all versions starting from 14.5 before 14.5.2, leads to potential elevated privileges in groups and projects under rare circumstances. This is a medium severity issue (CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:H/A:N, 5.9). It is now mitigated in the latest release and is assigned CVE-2021-39937. This vulnerability has been discovered internally by the GitLab team. Project access token names are returned for unauthenticated requesters 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. This is a medium severity issue (CVSS:3.0/AV:N /AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N, 5.3). It is now mitigated in the latest release and is assigned CVE-2021-39915. Thanks @joaxcar for reporting this vulnerability through our HackerOne bug bounty program. Sensitive info disclosure in logs In all versions of GitLab CE/EE starting version 14.0 before 14.3.6, all versions starting from 14.4 before 14.4.4, all versions starting from 14.5 before 14.5.2, the reset password token and new user email token are accidentally logged which may lead to information disclosure. This is a medium severity issue (CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U /C:H/I:N/A:N, 4.4). It is now mitigated in the latest release and is assigned CVE-2021-39919. This vulnerability was discovered internally by a member of the GitLab team. Disclosure of a user's custom project and group templates Missing authorization in GitLab EE versions starting from 12.4 before 14.3.6, starting from 14.4.0 before 14.4.4, and starting from 14.5.0 before 14.5.2 allowed an attacker to access a user's custom project and group templates. This is a medium severity issue (CVSS:3.0/AV:N /AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N, 4.3). It is now mitigated in the latest release and is assigned CVE-2021-39930. Thanks @ngalog for reporting this vulnerability through our HackerOne bug bounty program. ReDoS in Maven package version An issue has been discovered in GitLab CE/EE affecting all versions starting from 13.2 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 Maven Package registry is vulnerable to a regular expression denial of service when a specifically crafted string is sent. This is a medium severity issue (CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L, 4.3). It is now mitigated in the latest release and is assigned CVE-2021-39940. Thanks @anyday for reporting this vulnerability through our HackerOne bug bounty program. Potential denial of service via the Diff feature An issue has been discovered in GitLab CE/EE affecting all versions starting from 11.0 before 14.3.6, all versions starting from 14.4 before 14.4.4, all versions starting from 14.5 before 14.5.2. Using large payloads, the diff feature could be used to trigger high load time for users reviewing code changes. This is a medium severity issue (CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L, 4.3). It is now mitigated in the latest release and is assigned CVE-2021-39932. This vulnerability has been discovered internally by the GitLab team. Regular Expression Denial of Service via user comments 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. This is a medium severity issue (CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L, 4.3). It is now mitigated in the latest release and is assigned CVE-2021-39933. Thanks @hashkitten, for reporting this vulnerability through our HackerOne bug bounty program. Service desk email accessible by any project member Improper access control allows any project member to retrieve the service desk email address in GitLab CE/EE 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. This is a medium severity issue (CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N, 4.3). It is now mitigated in the latest release and is assigned CVE-2021-39934. Thanks @gratitude101 for reporting this vulnerability through our HackerOne bug bounty program. Regular Expression Denial of Service via quick actions 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. This is a medium severity issue (CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L, 4.3). It is now mitigated in the latest release and is assigned CVE-2021-39917. Thanks @hashkitten, for reporting this vulnerability through our HackerOne bug bounty program. IDOR in "external status check" API leaks data about any status check on the instance 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. This is a medium severity issue (CVSS:3.0/AV:N /AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N, 4.3). It is now mitigated in the latest release and is assigned CVE-2021-39916. Thanks @joaxcar for reporting this vulnerability through our HackerOne bug bounty program. Default branch name visible in public projects restricting access to the source code repository An information disclosure vulnerability in GitLab CE/EE versions 12.0 to 14.3.6, 14.4 to 14.4.4, and 14.5 to 14.5.2 allowed non-project members to see the default branch name for projects that restrict access to the repository to project members. This is a low severity issue (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N, 3.7). It is now mitigated in the latest release and is assigned CVE-2021-39941. Thanks @ashish_r_padelkar for reporting this vulnerability through our HackerOne bug bounty program. Deploy token allows access to disabled project Wiki Improper access control in GitLab CE/EE affecting all versions starting from 10.7 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 in possession of a deploy token to access a project's disabled wiki. This is a low severity issue (CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N, 3.5). It is now mitigated in the latest release and is assigned CVE-2021-39936. Thanks @vaib25vicky for reporting this vulnerability through our HackerOne bug bounty program. Regular Expression Denial of Service via deploy Slash commands A vulnerable regular expression pattern in GitLab CE/EE since version 8.15 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 cause uncontrolled resource consumption leading to Denial of Service via specially crafted deploy Slash commands. This is a low severity issue (CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L, 3.1). It is now mitigated in the latest release and is assigned CVE-2021-39938. This vulnerability has been discovered internally by the GitLab team. Users can reply to Vulnerability Report discussions despite Only Project Members settings Incorrect Authorization in GitLab EE affecting all versions starting from 11.1 before 14.3.6, all versions starting from 14.4 before 14.4.4, all versions starting from 14.5 before 14.5.2, allows a user to add comments to a vulnerability which cannot be accessed. This is a low severity issue (CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N, 3.1). It is now mitigated in the latest release and is assigned CVE-2021-39918. Thanks @wi11 for reporting this vulnerability through our HackerOne bug bounty program. Unauthorised deletion of protected branches An issue has been discovered in GitLab CE/EE affecting all versions starting from 8.11 before 14.3.6, all versions starting from 14.4 before 14.4.4, all versions starting from 14.5 before 14.5.2. Under specific condition an unauthorised project member was allowed to delete a protected branches due to a business logic error. This is a low severity issue (CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N, 3.1). It is now mitigated in the latest release and is assigned CVE-2021-39931. Thanks @joaxcar for reporting this vulnerability through our HackerOne bug bounty program. Author can approve Merge Request after having access revoked 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. This is a low severity issue (CVSS:3.0/AV:N /AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N, 2.7). It is now mitigated in the latest release and is assigned CVE-2021-39945. Thanks @muthu_prakash for reporting this vulnerability through our HackerOne bug bounty program. HTML Injection via Swagger UI 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. This is a low severity issue (CVSS:3.0/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:L/A:N, 2.6). It is now mitigated in the latest release and is assigned CVE-2021-39910. Thanks @kannthu for reporting this vulnerability through our HackerOne bug bounty program. Update Ruby The version of Ruby included in GitLab Omnibus has been updated to 2.7.5 in order to mitigate security concerns. Versions affected Affects all versions of GitLab Omnibus. Update Rails The version of Rails included in GitLab Omnibus has been updated to 6.1.4.1 in order to mitigate security concerns. Versions affected Affects versions 12.8 and later. Update ncurses The version of ncurses included in GitLab Omnibus has been updated to 6.3 in order to mitigate security concerns. Versions affected Affects all versions of GitLab Omnibus. Update libgcrypt The version of libgcrypt included in GitLab Omnibus has been updated to 1.9.4 in order to mitigate security concerns. Versions affected Affects versions 10.3 and later. Update mattermost The version of mattermost included in GitLab Omnibus versions 14.4.4 and 14.5.2 has been updated to 5.39.2 in order to mitigate security concerns. The version of mattermost included in GitLab Omnibus versions 14.3.6 has been updated to 5.38.4 in order to mitigate security concerns. Versions affected Affects versions 14.1 and later. Update graphql The version of graphql included in GitLab Omnibus has been updated to 1.11.10 in order to mitigate security concerns. Versions affected Affects versions 8.11 and later. Update mermaid The version of mermaid included in GitLab Omnibus has been updated to 8.13.4 in order to mitigate security concerns. Versions affected Affects all versions of GitLab Omnibus. Updating To update GitLab, see the Update page. To update Gitlab Runner, see the Updating the Runner page. Receive Security Release Notifications To receive security release blog notifications delivered to your inbox, visit our contact us page. To receive release notifications via RSS, subscribe to our security release RSS feed or our RSS feed for all releases. ========================================================= + CERT-RENATER | tel : 01-53-94-20-44 + + 23/25 Rue Daviel | fax : 01-53-94-20-41 + + 75013 Paris | email:cert@support.renater.fr + =========================================================