This security bulletin contains one high risk vulnerability.
Exploit availability: NoDescription
The vulnerability allows a remote attacker to bypass authentication process.
The vulnerability exists due to the affected software improperly reuses encryption key parameters in the Inbound TCP Agent Protocol/3. A remote attacker with knowledge of agent names can obtain the connection secrets for those agents, which can be used to connect to Jenkins, impersonating those agents.Mitigation
Install updates from vendor's website.Vulnerable software versions
Jenkins: 2.0 - 2.213
Jenkins LTS: 2.7.1 - 2.204.1
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.