{"id":"UBUNTU-CVE-2018-16152","details":"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 in the digestAlgorithm.parameters field during PKCS#1 v1.5 signature verification. Consequently, 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. This is a variant of CVE-2006-4790 and CVE-2014-1568.","modified":"2026-02-04T03:50:17.864521Z","published":"2018-09-24T12:00:00Z","related":["USN-3771-1"],"upstream":["CVE-2018-16152"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2018-16152"},{"type":"REPORT","url":"https://www.strongswan.org/blog/2018/09/24/strongswan-vulnerability-(cve-2018-16151,-cve-2018-16152).html"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-3771-1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2018-16152"}],"affected":[{"package":{"name":"strongswan","ecosystem":"Ubuntu:14.04:LTS","purl":"pkg:deb/ubuntu/strongswan@5.1.2-0ubuntu2.10?arch=source&distro=trusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.1.2-0ubuntu2.10"}]}],"versions":["4.6.4-9","5.1.0-2","5.1.0-3","5.1.1-0ubuntu1","5.1.1-0ubuntu2","5.1.1-0ubuntu3","5.1.1-0ubuntu4","5.1.1-0ubuntu5","5.1.1-0ubuntu7","5.1.1-0ubuntu14","5.1.1-0ubuntu17","5.1.2~dr3+git20130120-0ubuntu2","5.1.2~dr3+git20130120-0ubuntu3","5.1.2~rc1-0ubuntu3","5.1.2~rc1-0ubuntu4","5.1.2~rc2-0ubuntu2","5.1.2-0ubuntu1","5.1.2-0ubuntu2","5.1.2-0ubuntu2.2","5.1.2-0ubuntu2.3","5.1.2-0ubuntu2.4","5.1.2-0ubuntu2.5","5.1.2-0ubuntu2.6","5.1.2-0ubuntu2.7","5.1.2-0ubuntu2.8"],"ecosystem_specific":{"availability":"No 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