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    • Eneas U de Queiroz's avatar
      openssl: fix CVE-2023-464 and CVE-2023-465 · f8282da1
      Eneas U de Queiroz authored
      
      Apply two patches fixing low-severity vulnerabilities related to
      certificate policies validation:
      
      - Excessive Resource Usage Verifying X.509 Policy Constraints
        (CVE-2023-0464)
        Severity: Low
        A security vulnerability has been identified in all supported versions
        of OpenSSL related to the verification of X.509 certificate chains
        that include policy constraints.  Attackers may be able to exploit
        this vulnerability by creating a malicious certificate chain that
        triggers exponential use of computational resources, leading to a
        denial-of-service (DoS) attack on affected systems.
        Policy processing is disabled by default but can be enabled by passing
        the `-policy' argument to the command line utilities or by calling the
        `X509_VERIFY_PARAM_set1_policies()' function.
      
      - Invalid certificate policies in leaf certificates are silently ignored
        (CVE-2023-0465)
        Severity: Low
        Applications that use a non-default option when verifying certificates
        may be vulnerable to an attack from a malicious CA to circumvent
        certain checks.
        Invalid certificate policies in leaf certificates are silently ignored
        by OpenSSL and other certificate policy checks are skipped for that
        certificate.  A malicious CA could use this to deliberately assert
        invalid certificate policies in order to circumvent policy checking on
        the certificate altogether.
        Policy processing is disabled by default but can be enabled by passing
        the `-policy' argument to the command line utilities or by calling the
        `X509_VERIFY_PARAM_set1_policies()' function.
      
      Note: OpenSSL also released a fix for low-severity security advisory
      CVE-2023-466.  It is not included here because the fix only changes the
      documentation, which is not built nor included in any OpenWrt package.
      
      Due to the low-severity of these issues, there will be not be an
      immediate new release of OpenSSL.
      
      Signed-off-by: default avatarEneas U de Queiroz <cotequeiroz@gmail.com>
      Unverified
      f8282da1
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