libuser 0.56/0.57 Directory Tree toctou

CVSS Meta Temp Score
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CTI Interest Score
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5.5$0-$5k0.00

Summaryinfo

A vulnerability marked as problematic has been reported in libuser 0.56/0.57. The affected element is an unknown function of the component Directory Tree Handler. This manipulation causes toctou. This vulnerability is registered as CVE-2012-5630. The attack needs to be launched locally. No exploit is available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in libuser 0.56/0.57. It has been declared as problematic. Affected by this vulnerability is an unknown code of the component Directory Tree Handler. The manipulation with an unknown input leads to a toctou vulnerability. The CWE definition for the vulnerability is CWE-367. The product checks the state of a resource before using that resource, but the resource's state can change between the check and the use in a way that invalidates the results of the check. This can cause the product to perform invalid actions when the resource is in an unexpected state. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

libuser 0.56 and 0.57 has a TOCTOU (time-of-check time-of-use) race condition when copying and removing directory trees.

The weakness was published 11/25/2019 by Florian Weimer with Red Hat (Website). The advisory is shared at lists.fedoraproject.org. This vulnerability is known as CVE-2012-5630 since 10/24/2012. An attack has to be approached locally. A single authentication is needed for exploitation. Neither technical details nor an exploit are publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 66006 (Fedora 18 : libuser-0.58-3.fc18 (2013-4571)), 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 eliminates this vulnerability. A possible mitigation has been published even before and not after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (66006) and SecurityFocus (BID 59285†). Similar entry is available at VDB-146188. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.8
VulDB Meta Temp Score: 5.7

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

NVD Base Score: 6.3
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Toctou
CWE: CWE-367 / CWE-362
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 66006
Nessus Name: Fedora 18 : libuser-0.58-3.fc18 (2013-4571)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 865565
OpenVAS Name: Fedora Update for libuser FEDORA-2013-4571
OpenVAS File: 🔍
OpenVAS Family: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

10/24/2012 🔍
03/28/2013 +155 days 🔍
03/30/2013 +2 days 🔍
04/18/2013 +19 days 🔍
11/25/2019 +2412 days 🔍
11/26/2019 +1 days 🔍
11/26/2019 +0 days 🔍

Sourcesinfo

Advisory: lists.fedoraproject.org
Researcher: Florian Weimer
Organization: Red Hat
Status: Not defined

CVE: CVE-2012-5630 (🔍)
GCVE (CVE): GCVE-0-2012-5630
GCVE (VulDB): GCVE-100-146185
SecurityFocus: 59285 - libuser CVE-2012-5630 Symlink Attack Local Security Bypass Vulnerability

See also: 🔍

Entryinfo

Created: 11/26/2019 06:51
Updated: 11/26/2019 06:56
Changes: 11/26/2019 06:51 (42), 11/26/2019 06:56 (31)
Complete: 🔍
Cache ID: 216:662:103

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

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