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    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.

    Published:Nov 7, 2018
    Last Modified:Nov 21, 2024
    EPS:Nov 7, 2018
    EPSS Score:0.00165
    CVSS Score:5.9

    Affected Products

    Vendor
    Axtls Project
    Product
    Axtls

    Exploits

    https://sourceforge.net/p/axtls/mailman/message/36459928/https://sourceforge.net/p/axtls/mailman/message/36459928/

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-463 Padding Oracle Crypto Attack
    CAPEC-475 Signature Spoofing by Improper Validation

    Related CVEs

    CVE-2023-33613 (CVSS 5.5) — axTLS v2.1.5 was discovered to contain a heap buffer overflow in the bi_import function in axtls-code/crypto/b…
    CVE-2019-10013 (CVSS 7.5) — The asn1_signature function in asn1.c in Cameron Hamilton-Rich axTLS through 2.1.5 has a Buffer Overflow that …
    CVE-2019-9689 (CVSS 7.5) — process_certificate in tls1.c in Cameron Hamilton-Rich axTLS through 2.1.5 has a Buffer Overflow via a crafted…
    CVE-2019-8981 (CVSS 9.8) — tls1.c in Cameron Hamilton-Rich axTLS before 2.1.5 has a Buffer Overflow via a crafted sequence of TLS packets…
    CVE-2018-16150 (CVSS 5.9) — In sig_verify() in x509.c in axTLS version 2.1.3 and before, the PKCS#1 v1.5 signature verification does not r…
    CVE-2018-16149 (CVSS 5.9) — In sig_verify() in x509.c in axTLS version 2.1.3 and before, the PKCS#1 v1.5 signature verification blindly tr…
    CVE-2017-1000416 (CVSS 5.3) — axTLS version 1.5.3 has a coding error in the ASN.1 parser resulting in the year (19)50 of UTCTime being misin…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High