What is CVE-2018-16253?

CVE-2018-16253 is a medium-severity vulnerability in Axtls Project, classified under Improper Verification of Cryptographic Signature. CVSS score: 5.9/10. Published 2018-11-07.

How severe is CVE-2018-16253?

Medium severity. CVSS v3 base score is 5.9 out of 10.

Vulnerability in Axtls Project

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 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.

EPSS: 0.006 (46.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N.

Affected products

Axtls_project Axtls
N/a — versions n/a

Weakness classification (CWE)

CWE-347 — Improper Verification of Cryptographic Signature

References

cve@mitre.org (x_refsource_CONFIRM, Patch, Third Party Advisory)
cve@mitre.org (mailing-list, x_refsource_MLIST, Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2018-16253?: CVE-2018-16253 is a medium-severity vulnerability in Axtls Project, classified under Improper Verification of Cryptographic Signature. CVSS score: 5.9/10. Published 2018-11-07.
How severe is CVE-2018-16253?: Medium severity. CVSS v3 base score is 5.9 out of 10.