CVE-2018-16149

MediumCVSS 5.9/10Last modified Jun 17, 2026

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.

Metrics

CVSS 3.0 5.9/10CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-347

Affected software

No affected versions have been published.

Timeline

Published: Nov 7, 2018
Last modified: Jun 17, 2026
NVD status: Modified

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