CVE-2018-16152
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 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.
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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