PT-2018-3465 · Strongswan+3 · Strongswan+3

Sze Yiu Chau · Published 2018-09-24 · Updated 2025-12-03 · CVE-2018-16151

Positive Technologies (AI Summary)

CVSS v2.0

7.8

High

Base vector

AV:N/AC:L/Au:N/C:N/I:C/A:N

Name of the Vulnerable Software and Affected Versions: strongSwan versions 4.x through 5.x before 5.7.0

Description: The issue is related to the verify emsa pkcs1 signature() function in the gmp plugin, which does not correctly verify cryptographic signatures. This can allow a remote attacker to forge signatures when small public exponents are used, potentially leading to impersonation when only an RSA signature is used for IKEv2 authentication.

Recommendations: For strongSwan versions 4.x through 5.x before 5.7.0, update to version 5.7.0 or later to resolve the issue. As a temporary workaround, consider restricting the use of small public exponents in RSA signatures until a patch is available.

Fix

Improper Verification of Cryptographic Signature

Weakness Enumeration

CWE-347

Related Identifiers

ALT-PU-2018-2384

BDU:2020-01851

CVE-2018-16151

DLA-1522-1

DSA-4305-1

DSA-4309-1

OPENSUSE-SU-2019:2594-1

OPENSUSE-SU-2019:2598-1

OPENSUSE-SU-2019_2594-1

OPENSUSE-SU-2019_2598-1

SUSE-SU-2019:3056-1

SUSE-SU-2019:3266-1

SUSE-SU-2022:14887-1

SUSE-SU-2022_14887-1

USN-3771-1

Affected Products

Alt Linux

Suse

Ubuntu

Strongswan

References · 75

• http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00077.html · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2019:3266-1 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2018-16151 · Vendor Advisory
• https://osv.dev/vulnerability/DLA-1522-1 · Vendor Advisory
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-16151 · Security Note
• https://ubuntu.com/security/notices/USN-3771-1 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2018-16151 · Security Note
• https://bdu.fstec.ru/vul/2020-01851 · Security Note
• https://osv.dev/vulnerability/DSA-4309-1 · Vendor Advisory
• https://osv.dev/vulnerability/USN-3771-1 · Vendor Advisory
• http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00047.html · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2018-16151 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2018-16151 · Vendor Advisory
• https://debian.org/security/2018/dsa-4305 · Vendor Advisory
• https://bdu.fstec.ru/vul/2020-01850 · Security Note