Python up to 3.3.2 ssl.match_hostname resource management

CVSS Meta Temp Score
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CTI Interest Score
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4.6$0-$5k0.00

A vulnerability classified as problematic has been found in Python up to 3.3.2 (Programming Language Software). Affected is the function ssl.match_hostname. The manipulation with an unknown input leads to a resource management vulnerability. CWE is classifying the issue as CWE-399. This is going to have an impact on availability. CVE summarizes:

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.

The weakness was disclosed 10/09/2013 by Florian Weimer with Red Hat Product Security Team (Website). The advisory is shared for download at bugs.python.org. This vulnerability is traded as CVE-2013-2099 since 02/19/2013. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are known technical details, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 70269 (Ubuntu 12.10 / 13.04 : python3.3 vulnerabilities (USN-1985-1)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Ubuntu Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 124707 (Fedora Security Update for python-pymongo (FEDORA-2016-52b294538d)).

The vulnerability is also documented in the databases at X-Force (96133) and Tenable (70269). The entries 8748, 87755 and 109972 are pretty similar.

Productinfo

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License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
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CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 4.6

VulDB Base Score: 5.3
VulDB Temp Score: 4.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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NVD Base Score: 🔍

Exploitinginfo

Class: Resource management
CWE: CWE-399 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Local: No
Remote: Yes

Availability: 🔍
Status: Unproven

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 70269
Nessus Name: Ubuntu 12.10 / 13.04 : python3.3 vulnerabilities (USN-1985-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 866066
OpenVAS Name: Fedora Update for zeroinstall-injector FEDORA-2013-12396
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
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Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

02/19/2013 🔍
05/15/2013 +85 days 🔍
05/30/2013 +15 days 🔍
06/04/2013 +5 days 🔍
10/02/2013 +120 days 🔍
10/02/2013 +0 days 🔍
10/09/2013 +7 days 🔍
10/09/2013 +0 days 🔍
03/24/2015 +531 days 🔍
01/08/2022 +2482 days 🔍

Sourcesinfo

Advisory: USN-1985-1
Researcher: Florian Weimer
Organization: Red Hat Product Security Team
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2013-2099 (🔍)
OVAL: 🔍

X-Force: 96133 - Python ssl.match_hostname() denial of service, Medium Risk
Vulnerability Center: 39829 - Python 3.2 Backports SSL match_hostname DoS Vulnerability (CVE-2013-2099), High
SecurityFocus: 59877 - Python 'ssl.match_hostname()' Function Denial of Service Vulnerability
Secunia: 55107 - Ubuntu update for python3.2, Less Critical

See also: 🔍

Entryinfo

Created: 03/24/2015 15:54
Updated: 01/08/2022 13:20
Changes: 03/24/2015 15:54 (78), 05/01/2017 11:32 (3), 01/08/2022 13:09 (3), 01/08/2022 13:14 (1), 01/08/2022 13:20 (2)
Complete: 🔍

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