UBUNTU-CVE-2018-16152

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UBUNTU-CVE-2018-16152

Summary:

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.

References: https://ubuntu.com/security/CVE-2018-16152, https://www.strongswan.org/blog/2018/09/24/strongswan-vulnerability-(cve-2018-16151,-cve-2018-16152).html, https://ubuntu.com/security/notices/USN-3771-1, https://www.cve.org/CVERecord?id=CVE-2018-16152