CVE-2018-16253 - CVE House
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Status published Medium CVE-2018-16253

In sig_verify() in x509.c in axTLS version 2.1.3 and before,...

Vulnerability 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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

No credits recorded in the NVD database.

References

More from axtls project

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CVE-2019-9689
process_certificate in tls1.c in Cameron Hamilton-Rich axTLS through 2.1.5 has...
High 7.5
CVE-2019-8981
tls1.c in Cameron Hamilton-Rich axTLS before 2.1.5 has a Buffer...
Critical 9.8
CVE-2019-10013
The asn1_signature function in asn1.c in Cameron Hamilton-Rich axTLS through...
High 7.5
CVE-2018-16150
In sig_verify() in x509.c in axTLS version 2.1.3 and before,...
Medium 5.9
CVE-2018-16149
In sig_verify() in x509.c in axTLS version 2.1.3 and before,...
Medium 5.9

Affected Vendor

axtls project

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Affected Software

axtls
Vulnerable Versions:
0

Timeline

Official Publish: November 7th, 2018
Last Modified: August 5th, 2024
Added to House: July 20th, 2026

CVSS Vectors

V3: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

Weaknesses (CWE)

No CWE data available

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.