CVE-2018-16151
strongswan - security update
7.5
HIGH
CVSS 3.1
EPSS 1.7%
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.
How to fix CVE-2018-16151
To remediate CVE-2018-16151, upgrade the affected package to a fixed version below.
- —upgrade to 5.7.0-r0 or later
- —upgrade to 5.7.0-1 or later
- —upgrade to 5.2.1-6+deb8u7 or later
- —upgrade to 5.5.1-4+deb9u3 or later
Is CVE-2018-16151 being exploited?
Low — EPSS is 1.7%, meaning exploitation activity has not been observed at scale.
Affected packages (4)
- from 0, < 5.7.0-r0
- from 0, < 5.7.0-1
- from 0, < 5.2.1-6+deb8u7
- from 0, < 5.5.1-4+deb9u3
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |