Tor 0.2.2.37 dns.c DNS Request resource management

CVSS Meta Temp Score
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CTI Interest Score
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7.2$0-$5k0.00

A vulnerability classified as critical has been found in Tor 0.2.2.37 (Network Encryption Software). Affected is an unknown code block of the file dns.c. The manipulation as part of a DNS Request 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:

Use-after-free vulnerability in dns.c in Tor before 0.2.2.38 might allow remote attackers to cause a denial of service (daemon crash) via vectors related to failed DNS requests.

The weakness was disclosed 07/31/2012 by Jan Lieskovsky (arma) as Bug 849949 as not defined posting (Bugzilla). The advisory is available at bugzilla.redhat.com. The public release has been coordinated in cooperation with the vendor. This vulnerability is traded as CVE-2012-3517 since 06/14/2012. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Technical details are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 74733 (openSUSE Security Update : tor (openSUSE-SU-2012:1068-1)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family SuSE Local Security Checks.

Upgrading to version 0.2.2.38 eliminates this vulnerability. The upgrade is hosted for download at gitweb.torproject.org. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (77997) and Tenable (74733). Further details are available at trac.torproject.org. The entries 6103 and 6104 are pretty similar.

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 7.2

VulDB Base Score: 7.5
VulDB Temp Score: 7.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

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

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 74733
Nessus Name: openSUSE Security Update : tor (openSUSE-SU-2012:1068-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 865300
OpenVAS Name: Fedora Update for tor FEDORA-2012-14650
OpenVAS File: 🔍
OpenVAS Family: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍
Exposure Time: 🔍

Upgrade: Tor 0.2.2.38

Timelineinfo

06/14/2012 🔍
07/31/2012 +47 days 🔍
07/31/2012 +0 days 🔍
08/21/2012 +21 days 🔍
08/21/2012 +0 days 🔍
08/21/2012 +0 days 🔍
08/25/2012 +3 days 🔍
09/03/2012 +9 days 🔍
09/10/2012 +7 days 🔍
01/09/2013 +121 days 🔍
06/06/2013 +148 days 🔍
06/13/2014 +372 days 🔍
04/12/2021 +2495 days 🔍

Sourcesinfo

Advisory: Bug 849949
Researcher: Jan Lieskovsky (arma)
Status: Not defined
Confirmation: 🔍
Coordinated: 🔍

CVE: CVE-2012-3517 (🔍)
X-Force: 77997
Vulnerability Center: 39866 - Tor <0.2.2.38 'dns.c\x27 Allows Remote DoS Vulnerability by Failed DNS Requests, High
SecurityFocus: 55128 - Tor Multiple Security Vulnerabilities
Secunia: 51782 - Gentoo update for tor, Moderately Critical
OSVDB: 85124

Misc.: 🔍
See also: 🔍

Entryinfo

Created: 09/10/2012 10:02
Updated: 04/12/2021 07:46
Changes: 09/10/2012 10:02 (87), 05/01/2017 11:41 (2), 04/12/2021 07:46 (3)
Complete: 🔍

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