UBUNTU-CVE-2018-16151

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    UBUNTU-CVE-2018-16151

    Published: 24 Sept 2018Last Modified: 4 Feb 2026
    Upstream:
    CVE-2018-16151
    Aliases:
    USN-3771-1

    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 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.

    References: https://ubuntu.com/security/CVE-2018-16151, 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-2018-16151

    Affected packages

    Package

    Name: strongswan

    Purl: pkg:deb/ubuntu/[email protected]?arch=source&distro=trusty

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -5.1.2-0ubuntu2.10

    Affected versions

    4.6.4-9

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    UBUNTU-CVE-2018-16151 | CVE-DB