Tor up to 0.1.1.14 Directory Authority policy_summarize memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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5.1$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, has been found in Tor up to 0.1.1.14. This affects the function policy_summarize of the component Directory Authority. The manipulation leads to memory corruption. This vulnerability is listed as CVE-2011-1924. There is no available exploit. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Tor up to 0.1.1.14 (Network Encryption Software). It has been rated as critical. This issue affects the function policy_summarize of the component Directory Authority. 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. The summary by CVE is:

Buffer overflow in the policy_summarize function in or/policies.c in Tor before 0.2.1.30 allows remote attackers to cause a denial of service (directory authority crash) via a crafted policy that triggers creation of a long port list.

The weakness was presented 06/14/2011 (Website). The advisory is shared at lists.torproject.org. The identification of this vulnerability is CVE-2011-1924 since 05/09/2011. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 54981 (Fedora 14 : tor-0.2.1.30-1400.fc14 (2011-7972)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Fedora Local Security Checks and running in the context l.

Upgrading to version 0.1.1.15 eliminates this vulnerability. A possible mitigation has been published before and not just after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (54981), SecurityFocus (BID 46618†) and Secunia (SA43548†). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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: 5.1

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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💳💳💳💳💳💳
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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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: 54981
Nessus Name: Fedora 14 : tor-0.2.1.30-1400.fc14 (2011-7972)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
Nessus Port: 🔍

OpenVAS ID: 802300
OpenVAS Name: Tor Directory Authority policy_summarize Denial of Service Vulnerability (Windows)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Tor 0.1.1.15
Patch: gitweb.torproject.org

Timelineinfo

03/01/2011 🔍
03/01/2011 +0 days 🔍
05/09/2011 +69 days 🔍
06/07/2011 +29 days 🔍
06/07/2011 +0 days 🔍
06/14/2011 +7 days 🔍
06/14/2011 +0 days 🔍
03/23/2015 +1378 days 🔍
11/08/2021 +2422 days 🔍

Sourcesinfo

Advisory: 43414eb98821d3b5c6c65181d7545ce938f82c8e
Status: Not defined
Confirmation: 🔍

CVE: CVE-2011-1924 (🔍)
GCVE (CVE): GCVE-0-2011-1924
GCVE (VulDB): GCVE-100-57653
SecurityFocus: 46618 - Tor Directory Authority 'src/or/policies.c' Denial of Service Vulnerability
Secunia: 43548 - Tor "policy_summarize()" Directory Authority Denial of Service Vulnerability, Moderately Critical

Entryinfo

Created: 03/23/2015 16:50
Updated: 11/08/2021 14:39
Changes: 03/23/2015 16:50 (69), 04/24/2019 01:16 (2), 11/08/2021 14:39 (4)
Complete: 🔍
Cache ID: 216:275:103

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