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GHSA-w7jr-wqw6-54xc

Non-constant time comparison of inbound TCP agent connection secret

Source: GitHub Advisory Database (reviewed) Moderate CVE-2020-2101

Packages

EcosystemPackageAffectedFixed in
Maven org.jenkins-ci.main:jenkins-core < 2.204.2 2.204.2
Maven org.jenkins-ci.main:jenkins-core >= 2.205, < 2.219 2.219

Details

As written in the advisory (Markdown source, shown as plain text).

Jenkins 2.218 and earlier, LTS 2.204.1 and earlier does not use a constant-time comparison validating the connection secret when an inbound TCP agent connection is initiated. This could potentially allow attackers to use statistical methods to obtain the connection secret. Jenkins 2.219, LTS 2.204.2 now uses a constant-time comparison function for verifying connection secrets.

References

External links from the advisory. They lead to third-party sites.