CVE-2018-16152
moderate-risk
Published 2018-09-26
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.
Do I need to act?
~
1.7% chance of exploitation in next 30 days
EPSS score — moderate exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
7
CVSS 7.5/10
High
NETWORK
/ LOW complexity
Affected Products (6)
Affected Vendors
References (16)
Third Party Advisory
https://security.gentoo.org/glsa/201811-16
Third Party Advisory
https://usn.ubuntu.com/3771-1/
Third Party Advisory
https://www.debian.org/security/2018/dsa-4305
Third Party Advisory
https://security.gentoo.org/glsa/201811-16
Third Party Advisory
https://usn.ubuntu.com/3771-1/
Third Party Advisory
https://www.debian.org/security/2018/dsa-4305
43
/ 100
moderate-risk
Severity
26/34 · High
Exploitability
4/34 · Minimal
Exposure
13/34 · Low