High severity · published Dec 15, 2023
CVE-2023-6680
An improper certificate validation issue in Smartcard authentication in GitLab EE affecting all versions from 11.6 prior to 16.4.4, 16.5 prior to 16.5.4, and 16.6 prior to 16.6.2…
8.1
CVSS
0.4%
EPSS
No
On KEV
Description
An improper certificate validation issue in Smartcard authentication in GitLab EE affecting all versions from 11.6 prior to 16.4.4, 16.5 prior to 16.5.4, and 16.6 prior to 16.6.2 allows an attacker to authenticate as another user given their public key if they use Smartcard authentication. Smartcard authentication is an experimental feature and has to be manually enabled by an administrator.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 31% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
GI
GitLab · GitLab
11.6 before 16.4.4; 16.5 before 16.5.4; 16.6 before 16.6.2 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-6680
CVE.org
https://www.cve.org/CVERecord?id=CVE-2023-6680
Broken Link
https://gitlab.com/gitlab-org/gitlab/-/issues/421607
More from GitLab
10.0
CVE-2026-85706
Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') in GitLab
10.0
CVE-2021-22205
GitLab Community and Enterprise Editions Remote Code Execution Vulnerability
9.8
CVE-2023-7028
Weak Password Recovery Mechanism for Forgotten Password in GitLab
9.8
CVE-2021-22175
GitLab Server-Side Request Forgery (SSRF) Vulnerability
7.5
CVE-2021-39935
GitLab Community and Enterprise Editions Server-Side Request Forgery (SSRF) Vulnerability