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.
9.5	$0-$5k	0.00

A vulnerability was found in Tor up to 0.2.2.35 (Network Encryption Software). It has been rated as critical. Affected by this issue is the function buf_pullup of the file or/buffers.c. The manipulation with an unknown input leads to a memory corruption vulnerability. Using CWE to declare the problem leads to CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. Impacted is confidentiality, integrity, and availability. CVE summarizes:

Multiple heap-based buffer overflows in Tor before 0.2.2.35 allow remote attackers to cause a denial of service (memory corruption) or possibly execute arbitrary code by (1) establishing a SOCKS connection to SocksPort or (2) leveraging a SOCKS proxy configuration.

The weakness was published 12/16/2011 with Debian (Website). The advisory is available at debian.org. This vulnerability is handled as CVE-2011-2778 since 07/19/2011. The exploitation is known to be difficult. The attack may be launched remotely. No form of authentication is required for exploitation. Technical details are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 57503 (Debian DSA-2363-1 : tor - buffer overflow), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Debian Local Security Checks.

Upgrading to version 0.2.2.35 eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (71860) and Tenable (57503).

Productinfo

Type

• Network Encryption Software

Name

• Tor

Version

• 0.2.2.0
• 0.2.2.1
• 0.2.2.2
• 0.2.2.3
• 0.2.2.4
• 0.2.2.5
• 0.2.2.6
• 0.2.2.7
• 0.2.2.8
• 0.2.2.9
• 0.2.2.10
• 0.2.2.11
• 0.2.2.12
• 0.2.2.13
• 0.2.2.14
• 0.2.2.15
• 0.2.2.16
• 0.2.2.17
• 0.2.2.18
• 0.2.2.19
• 0.2.2.20
• 0.2.2.21
• 0.2.2.22
• 0.2.2.23
• 0.2.2.24
• 0.2.2.25
• 0.2.2.26
• 0.2.2.27
• 0.2.2.28
• 0.2.2.29
• 0.2.2.30
• 0.2.2.31
• 0.2.2.32
• 0.2.2.33
• 0.2.2.34
• 0.2.2.35

License

• open-source

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

CVSSv4info

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

CVSSv3info

VulDB Meta Base Score: 10.0
VulDB Meta Temp Score: 9.5

VulDB Base Score: 10.0
VulDB Temp Score: 9.5
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: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Memory corruption
CWE: CWE-119
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	unlock	unlock	unlock	unlock
Today	unlock	unlock	unlock	unlock

Nessus ID: 57503
Nessus Name: Debian DSA-2363-1 : tor - buffer overflow
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 70575
OpenVAS Name: Debian Security Advisory DSA 2363-1 (tor)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Upgrade: Tor 0.2.2.35

Timelineinfo

07/19/2011 🔍
12/16/2011 +150 days 🔍
12/16/2011 +0 days 🔍
12/16/2011 +0 days 🔍
12/19/2011 +3 days 🔍
12/22/2011 +2 days 🔍
12/22/2011 +0 days 🔍
01/12/2012 +21 days 🔍
01/21/2012 +9 days 🔍
03/13/2012 +52 days 🔍
03/20/2021 +3294 days 🔍

Sourcesinfo

Advisory: debian.org
Organization: Debian
Status: Not defined
Confirmation: 🔍

CVE: CVE-2011-2778 (🔍)
OVAL: 🔍

X-Force: 71860
Vulnerability Center: 34625 - Tor Before 0.2.2.35 SOCKS Multiple Heap-Based Buffer Overflows Allow Remote DoS \\ Code Execution, High
SecurityFocus: 51097 - Tor SOCKS Connection Heap Based Buffer Overflow Vulnerability
Secunia: 47259 - Debian update for tor, Highly Critical
OSVDB: 77947

Entryinfo

Created: 01/21/2012 01:00
Updated: 03/20/2021 09:28
Changes: 01/21/2012 01:00 (70), 04/10/2017 11:43 (10), 03/20/2021 09:28 (2)
Complete: 🔍

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