FreeBSD : OpenSSL -- Excessive Resource Usage Verifying X.509 Policy Constraints (1ba034fb-ca38-11ed-b242-d4c9ef517024)

medium Nessus Plugin ID 173388



The remote FreeBSD host is missing one or more security-related updates.


The version of FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the 1ba034fb-ca38-11ed-b242-d4c9ef517024 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)

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


Update the affected packages.

See Also

Plugin Details

Severity : Medium

ID : 173388

File Name : freebsd_pkg_1ba034fbca3811edb242d4c9ef517024.nasl

Version : 1.1

Type : local

Published : 3/24/2023

Updated : 3/27/2023

Risk Information


Risk Factor : Medium

Score : 4.4


Risk Factor : Medium

Base Score : 5

Temporal Score : 3.7

Vector : AV:N/AC:L/Au:N/C:N/I:N/A:P

Temporal Vector : E:U/RL:OF/RC:C

CVSS Score Source : CVE-2023-0464


Risk Factor : Medium

Base Score : 5.9

Temporal Score : 5.2

Vector : CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Temporal Vector : E:U/RL:O/RC:C

Vulnerability Information

CPE : p-cpe:/a:freebsd:freebsd:openssl , p-cpe:/a:freebsd:freebsd:openssl-quic , p-cpe:/a:freebsd:freebsd:openssl30 , p-cpe:/a:freebsd:freebsd:openssl31 , cpe:/o:freebsd:freebsd

Required KB Items : Host/local_checks_enabled , Host/FreeBSD/release , Host/FreeBSD/pkg_info

Exploit Ease : No known exploits are available

Patch Publication Date : 3/24/2023

Vulnerability Publication Date : 3/21/2023

Reference Information

CVE : CVE-2023-0464