CVE-2018-16253 In sig_verify() in x509.c in axTLS version 2.1.3 and before, the PKCS#1 v1.5 signature verification does not properly verify the ASN.1 metadata. Consequently, a remote attacker can forge signatures wh...
MediumCVSS 5.9
EPSS 0.62%
- Published
- Updated
- Exploit status
- No public exploit known
Description
In sig_verify() in x509.c in axTLS version 2.1.3 and before, the PKCS#1 v1.5 signature verification does not properly verify the ASN.1 metadata. Consequently, a remote attacker can forge signatures when small public exponents are being used, which could lead to impersonation through fake X.509 certificates. This is an even more permissive variant of CVE-2006-4790 and CVE-2014-1568.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| axtls project axtls | <= 2.1.3 | No fix listed |
References
- github.com patch third-party-advisory
- [axtls-general] 20181105 Re: Problems of PKCS#1 v1.5 RSA Signature Verification exploit mailing-list third-party-advisory