CVE-2018-16151
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.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2018-16151
Vendor advisory: suse — https://www.suse.com/security/cve/CVE-2018-16151.html
Vendor advisory: arch — https://security.archlinux.org/ASA-201809-4
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| arch | fixed | 5.7.0-1 | |
| sles | affected | | |
| debian | bookworm | fixed | 5.7.0-1 |
| debian | bullseye | fixed | 5.7.0-1 |
| debian | forky | fixed | 5.7.0-1 |
| debian | sid | fixed | 5.7.0-1 |
| debian | trixie | fixed | 5.7.0-1 |
References
Verify integrity in audit chain (admin only). AS-IS.