Tor 0.2.2.38 common/util.c tor_timegm input validation

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 has been found in Tor 0.2.2.38. Affected is the function tor_timegm of the file common/util.c. This manipulation causes input validation. This vulnerability appears as CVE-2012-4922. There is no available exploit. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability has been found in Tor 0.2.2.38 (Network Encryption Software) and classified as critical. Affected by this vulnerability is the function tor_timegm of the file common/util.c. The manipulation with an unknown input leads to a input validation vulnerability. The CWE definition for the vulnerability is CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. As an impact it is known to affect availability. The summary by CVE is:

The tor_timegm function in common/util.c in Tor before 0.2.2.39, and 0.2.3.x before 0.2.3.22-rc, does not properly validate time values, which allows remote attackers to cause a denial of service (assertion failure and daemon exit) via a malformed directory object, a different vulnerability than CVE-2012-4419.

The weakness was presented 09/11/2012 as 2012-4922 as not defined posting (MITRE CVE). The advisory is shared at cve.mitre.org. The public release was coordinated in cooperation with the project team. This vulnerability is known as CVE-2012-4922 since 09/14/2012. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 62234 (Fedora 18 : tor-0.2.2.39-1800.fc18 (2012-14638)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Fedora Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 165313 (SUSE Security Update (openSUSE-SU-2012:1278-1)).

Upgrading to version 0.2.2.39 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 (78793), Tenable (62234), SecurityFocus (BID 55519†), OSVDB (85491†) and Secunia (SA50578†). See VDB-6312 for similar entry. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

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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: Input validation
CWE: CWE-20
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: 62234
Nessus Name: Fedora 18 : tor-0.2.2.39-1800.fc18 (2012-14638)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

OpenVAS ID: 865300
OpenVAS Name: Fedora Update for tor FEDORA-2012-14650
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Upgrade: Tor 0.2.2.39

Timelineinfo

09/11/2012 🔍
09/11/2012 +0 days 🔍
09/11/2012 +0 days 🔍
09/12/2012 +1 days 🔍
09/14/2012 +2 days 🔍
09/14/2012 +0 days 🔍
09/14/2012 +0 days 🔍
09/14/2012 +0 days 🔍
09/21/2012 +7 days 🔍
12/03/2012 +73 days 🔍
04/13/2021 +3053 days 🔍

Sourcesinfo

Advisory: 2012-4922
Status: Not defined
Confirmation: 🔍
Coordinated: 🔍

CVE: CVE-2012-4922 (🔍)
GCVE (CVE): GCVE-0-2012-4922
GCVE (VulDB): GCVE-100-6313
X-Force: 78793
SecurityFocus: 55519 - Tor Multiple Denial of Service Vulnerabilities
Secunia: 50578 - Tor Two Assertion Failure Denial of Service Vulnerabilities, Less Critical
OSVDB: 85491
Vulnerability Center: 37482 - Tor \x27tor_timegm\x27 Function Error Allows Remote DoS via a Malformed Directory Object, Medium

See also: 🔍

Entryinfo

Created: 09/21/2012 10:23
Updated: 04/13/2021 08:12
Changes: 09/21/2012 10:23 (81), 04/22/2017 09:16 (3), 04/13/2021 08:12 (3)
Complete: 🔍
Committer: olku
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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