Tor 0.2.2.37 Document routerparse.c networkstatus_parse_vote_from_string memory corruption

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

Summaryinfo

A vulnerability classified as problematic was found in Tor 0.2.2.37. Affected is the function networkstatus_parse_vote_from_string of the file routerparse.c of the component Document Handler. Such manipulation leads to memory corruption. This vulnerability is traded as CVE-2012-3518. There is no exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Tor 0.2.2.37 (Network Encryption Software). Affected by this issue is the function networkstatus_parse_vote_from_string of the file routerparse.c of the component Document Handler. 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 availability. CVE summarizes:

The networkstatus_parse_vote_from_string function in routerparse.c in Tor before 0.2.2.38 does not properly handle an invalid flavor name, which allows remote attackers to cause a denial of service (out-of-bounds read and daemon crash) via a crafted (1) vote document or (2) consensus document.

The weakness was shared 08/03/2012 by arma as Bug 6530 as not defined posting (Website). The advisory is shared for download at gitweb.torproject.org. The vendor cooperated in the coordination of the public release. This vulnerability is handled as CVE-2012-3518 since 06/14/2012. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. There are known technical details, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 62086 (Debian DSA-2548-1 : tor - several vulnerabilities), 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 0.2.2.38 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 (77998), Tenable (62086), SecurityFocus (BID 55128†), OSVDB (85126†) and Secunia (SA50583†). The entries VDB-6102 and VDB-6103 are related to this item. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

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

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

NVD Base Score: 🔍

Exploitinginfo

Class: Memory corruption
CWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 62086
Nessus Name: Debian DSA-2548-1 : tor - several vulnerabilities
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 72177
OpenVAS Name: Debian Security Advisory DSA 2548-1 (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 0.2.2.38

Timelineinfo

06/14/2012 🔍
08/03/2012 +50 days 🔍
08/03/2012 +0 days 🔍
08/21/2012 +18 days 🔍
08/21/2012 +0 days 🔍
08/25/2012 +4 days 🔍
09/03/2012 +9 days 🔍
09/10/2012 +7 days 🔍
09/14/2012 +4 days 🔍
09/14/2012 +0 days 🔍
06/06/2013 +265 days 🔍
04/12/2021 +2867 days 🔍

Sourcesinfo

Advisory: Bug 6530
Researcher: arma
Status: Not defined
Confirmation: 🔍
Coordinated: 🔍

CVE: CVE-2012-3518 (🔍)
GCVE (CVE): GCVE-0-2012-3518
GCVE (VulDB): GCVE-100-6104

OVAL: 🔍

X-Force: 77998
SecurityFocus: 55128 - Tor Multiple Security Vulnerabilities
Secunia: 50583 - Debian update for tor, Less Critical
OSVDB: 85126
Vulnerability Center: 39865 - Tor <0.2.2.38 'routerparse.c\x27 Allows Remote DoS Vulnerability via Crafted Vote or Consensus Document, High

See also: 🔍

Entryinfo

Created: 09/10/2012 10:10
Updated: 04/12/2021 07:59
Changes: 09/10/2012 10:10 (83), 05/01/2017 11:41 (4), 04/12/2021 07:59 (3)
Complete: 🔍
Committer: olku
Cache ID: 216:7FA:103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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