xdg-user-dirs up to 0.15.4 on Red Hat Linux Umask Policy xdg-user-dirs.sh access control

CVSS Meta Temp Score
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CTI Interest Score
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7.5$0-$5k0.00

Summaryinfo

A vulnerability categorized as critical has been discovered in xdg-user-dirs up to 0.15.4 on Red Hat Linux. The affected element is an unknown function of the file xdg-user-dirs.sh of the component Umask Policy Handler. The manipulation results in access control. This vulnerability is identified as CVE-2017-15131. The attack is only possible with local access. There is not any exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical has been found in xdg-user-dirs up to 0.15.4 on Red Hat Linux. Affected is an unknown functionality of the file xdg-user-dirs.sh of the component Umask Policy Handler. The manipulation with an unknown input leads to a access control vulnerability. CWE is classifying the issue as CWE-264. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

It was found that system umask policy is not being honored when creating XDG user directories, since Xsession sources xdg-user-dirs.sh before setting umask policy. This only affects xdg-user-dirs before 0.15.5 as shipped with Red Hat Enterprise Linux.

The bug was discovered 01/09/2018. The weakness was released 01/09/2018 as Bug 1412762 as not defined bug report (Bugzilla). The advisory is available at bugzilla.redhat.com. This vulnerability is traded as CVE-2017-15131 since 10/08/2017. The exploitability is told to be easy. Local access is required to approach this attack. The exploitation doesn't require any form of authentication. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1068 by the MITRE ATT&CK project.

The vulnerability scanner Nessus provides a plugin with the ID 106165 (EulerOS 2.0 SP1 : xdg-user-dirs (EulerOS-SA-2018-1024)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Huawei Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 351293 (Amazon Linux Security Advisory for xdg-user-dirs: ALAS2-2018-1030).

Upgrading to version 0.15.5 eliminates this vulnerability. A possible mitigation has been published 2 weeks after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (106165). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.8
VulDB Meta Temp Score: 7.6

VulDB Base Score: 7.8
VulDB Temp Score: 7.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.8
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Access control
CWE: CWE-264
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: 106165
Nessus Name: EulerOS 2.0 SP1 : xdg-user-dirs (EulerOS-SA-2018-1024)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Upgrade: xdg-user-dirs 0.15.5

Timelineinfo

10/08/2017 🔍
01/09/2018 +93 days 🔍
01/09/2018 +0 days 🔍
01/09/2018 +0 days 🔍
01/10/2018 +1 days 🔍
01/17/2018 +7 days 🔍
01/19/2018 +2 days 🔍
12/20/2019 +700 days 🔍

Sourcesinfo

Advisory: Bug 1412762
Status: Not defined
Confirmation: 🔍

CVE: CVE-2017-15131 (🔍)
GCVE (CVE): GCVE-0-2017-15131
GCVE (VulDB): GCVE-100-111546

Entryinfo

Created: 01/10/2018 14:13
Updated: 12/20/2019 19:21
Changes: 01/10/2018 14:13 (71), 12/20/2019 19:21 (3)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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