In verify_emsa_pkcs1_signature() in gmp_rsa_public_key.c in the gmp plugin in strongSwan...
Vulnerability Description
In verify_emsa_pkcs1_signature() in gmp_rsa_public_key.c in the gmp plugin in strongSwan 4.x and 5.x before 5.7.0, the RSA implementation based on GMP does not reject excess data after the encoded algorithm OID during PKCS#1 v1.5 signature verification. Similar to the flaw in the same version of strongSwan regarding digestAlgorithm.parameters, a remote attacker can forge signatures when small public exponents are being used, which could lead to impersonation when only an RSA signature is used for IKEv2 authentication.
Impact Analysis
Refer to official advisory for detailed impact metrics.
Remediation
Ensure systems are updated to the latest vendor-supplied patch levels.
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Credits & Attribution
No credits recorded in the NVD database.
References
- https://www.debian.org/security/2018/dsa-4305
- https://security.gentoo.org/glsa/201811-16
- https://www.strongswan.org/blog/2018/09/24/strongswan-vulnerability-%28cve-2018-16151%2C-cve-2018-16152%29.html
- https://lists.debian.org/debian-lts-announce/2018/09/msg00032.html
- https://usn.ubuntu.com/3771-1/
- http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00077.html
- http://lists.opensuse.org/opensuse-security-announce/2019-12/msg00001.html
- http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00047.html
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Weaknesses (CWE)
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MITRE ATT&CK TTPs
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