Vulnerability Details 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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.002
EPSS Ranking 38.3%
CVSS Severity
CVSS v3 Score 5.9
CVSS v2 Score 4.3
References
Products affected by CVE-2018-16253
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cpe:2.3:a:axtls_project:axtls:1.4.2
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cpe:2.3:a:axtls_project:axtls:1.4.3
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cpe:2.3:a:axtls_project:axtls:1.4.4
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cpe:2.3:a:axtls_project:axtls:1.4.5
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cpe:2.3:a:axtls_project:axtls:1.4.6
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cpe:2.3:a:axtls_project:axtls:1.4.8
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cpe:2.3:a:axtls_project:axtls:1.4.9
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cpe:2.3:a:axtls_project:axtls:1.5.0
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cpe:2.3:a:axtls_project:axtls:1.5.1
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cpe:2.3:a:axtls_project:axtls:1.5.2
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cpe:2.3:a:axtls_project:axtls:1.5.3
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cpe:2.3:a:axtls_project:axtls:1.5.4
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cpe:2.3:a:axtls_project:axtls:2.0.0
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cpe:2.3:a:axtls_project:axtls:2.0.1
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cpe:2.3:a:axtls_project:axtls:2.1.0
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cpe:2.3:a:axtls_project:axtls:2.1.1
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cpe:2.3:a:axtls_project:axtls:2.1.2
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cpe:2.3:a:axtls_project:axtls:2.1.3