CVE-2018-16152
Published: 24 September 2018
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.
Priority
Status
Package | Release | Status |
---|---|---|
strongswan Launchpad, Ubuntu, Debian |
upstream |
Needs triage
|
trusty |
Released
(5.1.2-0ubuntu2.10)
|
|
xenial |
Released
(5.3.5-1ubuntu3.7)
|
|
bionic |
Released
(5.6.2-1ubuntu2.2)
|
Severity score breakdown
Parameter | Value |
---|---|
Base score | 7.5 |
Attack vector | Network |
Attack complexity | Low |
Privileges required | None |
User interaction | None |
Scope | Unchanged |
Confidentiality | None |
Integrity impact | High |
Availability impact | None |
Vector | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |