CVE-2018-16149 In sig_verify() in x509.c in axTLS version 2.1.3 and before, the PKCS#1 v1.5 signature verification blindly trusts the declared lengths in the ASN.1 structure. Consequently, when small public exponent...
MediumCVSS 5.9
EPSS 0.70%
- 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 blindly trusts the declared lengths in the ASN.1 structure. Consequently, when small public exponents are being used, a remote attacker can generate purposefully crafted signatures (and put them on X.509 certificates) to induce illegal memory access and crash the verifier.
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 patch third-party-advisory