The version of openssl11 installed on the remote host is prior to 1.1.1g-12. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2-2023-2039 advisory.

  - 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. (CVE-2023-0464)

  - 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. (CVE-2023-0465)

  - The function X509_VERIFY_PARAM_add0_policy() is documented to implicitly enable the certificate policy     check when doing certificate verification. However the implementation of the function does not enable the     check which allows certificates with invalid or incorrect policies to pass the certificate verification.
    As suddenly enabling the policy check could break existing deployments it was decided to keep the existing     behavior of the X509_VERIFY_PARAM_add0_policy() function. Instead the applications that require OpenSSL to     perform certificate policy check need to use X509_VERIFY_PARAM_set1_policies() or explicitly enable the     policy check by calling X509_VERIFY_PARAM_set_flags() with the X509_V_FLAG_POLICY_CHECK flag argument.
    Certificate policy checks are disabled by default in OpenSSL and are not commonly used by applications.
    (CVE-2023-0466)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Detections

Analytics

Amazon Linux 2 : openssl11 (ALAS-2023-2039)

medium Nessus Plugin ID 175969

Version 1.1

Version 1.0

Version 1.1 Aug 10, 2023, 4:05 PM IAVM reference Plugin Feed: 202308101605
Version 1.0 May 17, 2023, 4:07 PM New Plugin Feed: 202305171607