Tor 0.2.2.39 TLS Session Keys missing encryption

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
5.9	$0-$5k	0.00

Summaryinfo

A vulnerability, which was classified as critical, has been found in Tor 0.2.2.39. This affects an unknown function of the component TLS Session Keys Handler. This manipulation causes missing encryption. Furthermore, an exploit is available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability has been found in Tor 0.2.2.39 (Network Encryption Software) and classified as critical. Affected by this vulnerability is an unknown functionality of the component TLS Session Keys Handler. The manipulation with an unknown input leads to a missing encryption vulnerability. The CWE definition for the vulnerability is CWE-311. The product does not encrypt sensitive or critical information before storage or transmission. As an impact it is known to affect confidentiality, and integrity.

The weakness was published 11/19/2012 by Florent Daigniere as not defined changelog entry (Website). It is possible to read the advisory at gitweb.torproject.org. The public release has been coordinated with the project team. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details are unknown but a public exploit is available. The attack technique deployed by this issue is T1600 according to MITRE ATT&CK.

After immediately, there has been an exploit disclosed. It is declared as proof-of-concept. We expect the 0-day to have been worth approximately $5k-$25k.

Upgrading to version 0.2.3.25 eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at OSVDB (87652†). Similar entries are available at VDB-7014, VDB-7016 and VDB-7017. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

Network Encryption Software

Name

Version

0.2.2.39

License

open-source

CPE 2.3info

🔍

CPE 2.2info

🔍

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.5
VulDB Meta Temp Score: 5.9

VulDB Base Score: 6.5
VulDB Temp Score: 5.9
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Missing encryption
CWE: CWE-311 / CWE-310
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍
Exploit Delay Time: 🔍

Upgrade: Tor 0.2.3.25

Timelineinfo

11/19/2012 🔍
11/19/2012 +0 days 🔍
11/19/2012 +0 days 🔍
11/23/2012 +4 days 🔍
11/26/2012 +3 days 🔍
05/02/2018 +1983 days 🔍

Sourcesinfo

Advisory: gitweb.torproject.org
Researcher: Florent Daigniere
Status: Not defined
Coordinated: 🔍

GCVE (VulDB): GCVE-100-7015
OSVDB: 87652

scip Labs: https://www.scip.ch/en/?labs.20161013
See also: 🔍

Entryinfo

Created: 11/26/2012 15:36
Updated: 05/02/2018 09:05
Changes: 11/26/2012 15:36 (47), 05/02/2018 09:05 (2)
Complete: 🔍
Committer:
Cache ID: 216:EC2:103