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Ubuntu: USN-3771-1 (CVE-2018-16152): strongSwan vulnerabilities

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Ubuntu: USN-3771-1 (CVE-2018-16152): strongSwan vulnerabilities

Severity
5
CVSS
(AV:N/AC:L/Au:N/C:N/I:P/A:N)
Published
09/24/2018
Created
03/19/2019
Added
10/02/2018
Modified
03/02/2020

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 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.

Solution(s)

  • ubuntu-upgrade-libstrongswan
  • ubuntu-upgrade-strongswan

References

  • USN-3771-1
  • DSA-4305
  • CVE-2018-16152

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