Threats Tagged 'cve-2026-50721'
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Threats Tagged 'cve-2026-50721'
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CVE-2026-50721: CWE-347: Improper Verification of Cryptographic Signature in The Libreswan Project libreswanCVE-2026-50721 0 Libreswan, via the function RSA_authenticate_hash_signature_raw_rsa(), did not correctly verify the length of the authentication hash when the SIG payload of an IKEv1 packet was encoded using PKCS #1 RSA Encryption as per RFC 2313. A remote attacker can use a variation on the Bleichenbacher attack to forge the SIG payload when small public exponents are being used (e.g., e=3), which could lead to impersonation. Additionally, a remote attacker, by encoding a shorter than expected hash in the SIG payload, could trigger an assertion leading to denial-of-service. The daemon aborts and restarts; continued exploitation causes sustained denial of service. Remote code execution is not possible. X.509 certificate verifications of remote IKE peers are not affected. Join the discussion | CVE Database V5 | 07/02/2026, 21:44:09 UTC Added: 07/02/2026, 22:06:45 UTC |
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