CyberRota Analysis
AI-GeneratedThe vulnerability affects users of sigstore-java version 2.0.0, which improperly removed the verification of Rekor entry time against the Fulcio certificate, allowing potential exploitation by malicious actors who can access a user's system and exfiltrate the temporary private key. This could enable the reuse of an old Fulcio certificate without needing direct access to user credentials, posing a risk to the integrity of signed artifacts. Users of the affected version should prioritize upgrading to sigstore-java 2.1.0 or later to ensure compliance with the Sigstore verification specification and enhance their security posture.
Public Exploit Signal
A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.
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Original NVD Description
sigstore-java is a sigstore java client for interacting with sigstore infrastructure. Version 2.0.0 erroneously removed verification of the integrated (Rekor entry) time) against the Fulcio certificate. Version 2.1.0 re-added this verification with enhancements that adhere to the Sigstore verification spec. The old sigstore-conformance test for this check was built incorrectly. This vulnerability impacts only users verifying bundles with `dev.sigstore:sigstore-java:2.0.0`. Older versions are not affected; it is fixed in `dev.sigstore:sigstore-java:2.1.0` A malicious actor may exploit this if they were able to access a users system and exfiltrate the temporary private key used during signing and then reuse an old fulcio certificate later without requiring direct access to the user's credentials. Users may protect themselves by re-verifying their artifacts using the newest sigstore-java or another current sigstore client. Transparency logs may also be audited for unauthorized signatures for a suspected reused identity.