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Linux Distros Unpatched Vulnerability : CVE-2013-2099

high Nessus Plugin ID 217845

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Synopsis

The Linux/Unix host has one or more packages installed with a vulnerability that the vendor indicates will not be patched.

Description

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

 - Algorithmic complexity vulnerability in the ssl.match_hostname function in Python 3.2.x, 3.3.x, and earlier, and unspecified versions of python-backports-ssl_match_hostname as used for older Python versions, allows remote attackers to cause a denial of service (CPU consumption) via multiple wildcard characters in the common name in a certificate. (CVE-2013-2099)

Note that Nessus relies on the presence of the package as reported by the vendor.

Solution

There is no known solution at this time.

See Also

https://access.redhat.com/security/cve/cve-2013-2099

https://ubuntu.com/security/CVE-2013-2099

Plugin Details

Severity: High

ID: 217845

File Name: unpatched_CVE_2013_2099.nasl

Version: 1.3

Type: Local

Agent: unix

Family: Misc.

Published: 3/4/2025

Updated: 7/16/2026

Supported Sensors: Agentless Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 1.2

Percentile: 0.01

CVSS v2

Risk Factor: Medium

Base Score: 4.3

Temporal Score: 3.7

Vector: CVSS2#AV:N/AC:M/Au:N/C:N/I:N/A:P

CVSS Score Source: CVE-2013-2099

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.9

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

Temporal Vector: CVSS:3.0/E:U/RL:U/RC:C

Vulnerability Information

CPE: p-cpe:/a:centos:centos:bzr, cpe:/o:canonical:ubuntu_linux:16.04:-:lts, p-cpe:/a:redhat:enterprise_linux:python-pymongo, cpe:/o:centos:centos:7, p-cpe:/a:redhat:enterprise_linux:bzr, cpe:/o:redhat:enterprise_linux:7, cpe:/a:redhat:openstack:5::el6, p-cpe:/a:redhat:enterprise_linux:bzr-doc, p-cpe:/a:centos:centos:bzr-doc, cpe:/o:redhat:enterprise_linux:6, p-cpe:/a:canonical:ubuntu_linux:w3af, p-cpe:/a:centos:centos:python-pymongo

Required KB Items: Host/OS/identifier, Host/cpu, Host/local_checks_enabled, global_settings/vendor_unpatched

Exploit Ease: No known exploits are available

Vulnerability Publication Date: 5/15/2013

Reference Information

CVE: CVE-2013-2099