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LIN8-9873 : Security Advisory - strongswan - CVE-2018-16151

Created: Oct 15, 2018    Updated: Dec 24, 2018
Resolved Date: Oct 21, 2018
Found In Version: 8.0.0.28
Fix Version: 8.0.0.28
Severity: Standard
Applicable for: Wind River Linux 8
Component/s: Userspace

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.

https://nvd.nist.gov/vuln/detail/CVE-2018-16151

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