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GHSA-g7mm-9vx7-jm7h
No affected components available
Impact
A vulnerability in Woodpecker CI's gRPC layer allowed any authenticated agent to impersonate any other agent on the same server by injecting a forged agent_id value into outgoing gRPC metadata. The server correctly verified the JWT token but then discarded the verified agent identity in favor of the client-supplied value.
Patches
Direct patch: https://github.com/woodpecker-ci/woodpecker/pull/6567 Later proper fix: https://github.com/woodpecker-ci/woodpecker/pull/6569
Workarounds
Disable org agents (WOODPECKER_DISABLE_USER_AGENT_REGISTRATION=true) and delete existing ones
Resources
Public ref: https://github.com/woodpecker-ci/woodpecker/issues/6541 Private com: https://github.com/woodpecker-ci/woodpecker-security/issues/21
The vulnerability can be exploited over the network without needing physical access. It is easy for an attacker to exploit this vulnerability. An attacker needs basic access or low-level privileges. No user interaction is needed for the attacker to exploit this vulnerability.
Exploitation attempts have been detected. Elevated vigilance and prompt remediation are advised.
The exploit probability is very low. The vulnerability is unlikely to be exploited in the next 30 days.
We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.
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