CVE-2018-16151
High
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.
SeverityHigh
CVSS7.5
Exploit probability—
Product
Strongswan
PublishedSep 26, 2018
First seenSep 26, 2018
Weakness typeCWE-347CWE-347
How to fix
Update
- strongswan strongswan5.7.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| strongswan strongswan | 4.0.0 ≤ v ≤ 4.6.4, 5.0.0 ≤ v < 5.7.0 | 5.7.0 |
| debian debian_linux | 8.0, 9.0 | — |
| canonical ubuntu_linux | 14.04, 16.04, 18.04 | — |
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