Tor 0.2.5/0.2.8/0.2.9 on Debian Buffer Chunk denial of service

CVSS Meta Temp Score
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CTI Interest Score
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4.9$0-$5k0.00

Summaryinfo

A vulnerability was found in Tor 0.2.5/0.2.8/0.2.9 on Debian and classified as problematic. Affected is an unknown function of the component Buffer Chunk Handler. Executing a manipulation can lead to denial of service. No exploit is available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability has been found in Tor 0.2.5/0.2.8/0.2.9 on Debian (Network Encryption Software) and classified as problematic. This vulnerability affects an unknown code of the component Buffer Chunk Handler. The manipulation with an unknown input leads to a denial of service vulnerability. The CWE definition for the vulnerability is CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. As an impact it is known to affect availability.

The weakness was published 10/18/2016 by Moritz Muehlenhoff as DSA-3694-1 as not defined mailinglist post (Bugtraq). The advisory is shared for download at seclists.org. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are neither technical details nor an exploit publicly available. The advisory points out:

It has been discovered that Tor treats the contents of some buffer chunks as if they were a NUL-terminated string. This issue could enable a remote attacker to crash a Tor client, hidden service, relay, or authority.

Upgrading to version 0.2.5.12, 0.2.8.9 or 0.2.9.4 eliminates this vulnerability.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 4.9

VulDB Base Score: 5.3
VulDB Temp Score: 4.9
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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

Exploitinginfo

Class: Denial of service
CWE: CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Tor 0.2.5.12/0.2.8.9/0.2.9.4

Timelineinfo

10/18/2016 🔍
10/18/2016 +0 days 🔍
05/12/2019 +936 days 🔍

Sourcesinfo

Advisory: DSA-3694-1
Researcher: Moritz Muehlenhoff
Status: Not defined

GCVE (VulDB): GCVE-100-92740

Entryinfo

Created: 10/19/2016 00:40
Updated: 05/12/2019 20:14
Changes: 10/19/2016 00:40 (42), 05/12/2019 20:14 (2)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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