Semaphore UI is a web interface for managing DevOps tools. Prior to 2.18.17 and 2.19.5-beta2, repository git_url handling passes an attacker-controlled --upload-pack option to CmdGitClient.GetLastRemoteCommitHash through POST /api/project/{id}/repositories and scheduled commit-hash polling, allowing a project Manager or Owner to execute arbitrary OS commands in the Semaphore server process. This issue is fixed in versions 2.18.17 and 2.19.5-beta2.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
Low
Basic privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
High
Complete denial of service
CVSS Vector v3.1
Weakness Type (CWE)
References 5
https://github.com/semaphoreui/semaphore/commit/7e8a9434bd81b82cf42220151c74801…
security-advisories@github.com
https://github.com/semaphoreui/semaphore/commit/a7a7a33a64aea382a0726b3722856f2…
security-advisories@github.com
https://github.com/semaphoreui/semaphore/security/advisories/GHSA-xp7j-h7jc-4w8p
security-advisories@github.com
https://github.com/semaphoreui/semaphore/tree/v2.18.17
security-advisories@github.com
https://github.com/semaphoreui/semaphore/tree/v2.19.5-beta2
security-advisories@github.com