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The CVE-2025-XXXXX vulnerability in rfc3161-client (versions ≤1.0.2) stems from improper validation of timestamp response (TSR) signatures. The library checks certificate chains up to a trusted root but fails to verify the TSR’s actual signature against the timestamping leaf certificate. This allows attackers to forge TSRs by embedding malicious certificates that chain to a trusted root, bypassing signature validation. Since the TSR’s integrity is not enforced, attackers can manipulate timestamps, leading to trust chain compromise.
DailyCVE Form:
Platform: rfc3161-client
Version: ≤1.0.2
Vulnerability: Signature bypass
Severity: Critical
Date: Jun 20, 2025
Prediction: Patch by Jun 27, 2025
What Undercode Say:
openssl verify -CAfile root.crt -untrusted intermediate.crt leaf.crt Example chain check tsr_verify --strict-signature Hypothetical fix command
How Exploit:
1. Craft malicious TSR with invalid signature.
- Embed attacker-controlled leaf cert chaining to trusted root.
3. Bypass validation, spoof timestamps.
Protection from this CVE:
- Upgrade to v1.0.3+.
- Enforce strict signature checks.
Impact:
- Timestamp forgery.
- Trust chain compromise.
Sources:
Reported By: github.com
Extra Source Hub:
Undercode
