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CVE-2018-16152

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…

Impact

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.

Affected products

VendorProductAffected versions
StrongswanStrongswan
from 4.0.0 through 4.6.4
from 5.0.0 before 5.7.0
DebianDebian Linux
Versions 8.0, 9.0
CanonicalUbuntu Linux
Versions 14.04, 16.04, 18.04

Weakness classification

CWE-347

References