CVE Vulnerability

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.

4.3 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 8.6 / Impact : 2.9

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact NONE

Integrity Impact PARTIAL

Availability Impact NONE

Scope

5.9 /10

CVSS v3.0 : MEDIUM

V3 Legend

Vector :

Exploitability : 2.2 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References
Link Resource
https://sourceforge.net/p/axtls/mailman/message/36459928/ Exploit Third Party Advisory
https://github.com/igrr/axtls-8266/commit/5efe2947ab45e81d84b5f707c51d1c64be52f36c Patch Third Party Advisory
Configurations

Configuration 1

cpe:2.3:a:axtls_project:axtls:*:*:*:*:*:*:*:*
Information

Published : 2018-11-07 08:29

Updated : 2018-12-13 06:06

NVD link : CVE-2018-16253

Mitre link : CVE-2018-16253

Products Affected
No products.
CWE
CWE-347

Improper Verification of Cryptographic Signature