util-linux up to 2.31 access control

CVSS Meta Temp Score
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CTI Interest Score
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6.9$0-$5k0.00

Summaryinfo

A vulnerability was found in util-linux up to 2.31. It has been rated as critical. Impacted is an unknown function. This manipulation causes access control. This vulnerability appears as CVE-2018-7738. The attack requires local access. There is no available exploit. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in util-linux up to 2.31. It has been declared as critical. Affected by this vulnerability is an unknown function. The manipulation with an unknown input leads to a access control vulnerability. The CWE definition for the vulnerability is CWE-264. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

In util-linux before 2.32-rc1, bash-completion/umount allows local users to gain privileges by embedding shell commands in a mountpoint name, which is mishandled during a umount command (within Bash) by a different user, as demonstrated by logging in as root and entering umount followed by a tab character for autocompletion.

The bug was discovered 03/07/2018. The weakness was presented 03/07/2018 (Website). It is possible to read the advisory at securityfocus.com. This vulnerability is known as CVE-2018-7738 since 03/06/2018. The exploitation appears to be easy. Attacking locally is a requirement. The exploitation doesn't need any form of authentication. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1068 according to MITRE ATT&CK.

The vulnerability scanner Nessus provides a plugin with the ID 108308 (Fedora 27 : util-linux (2018-668664ba84)), 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. The commercial vulnerability scanner Qualys is able to test this issue with plugin 171729 (SUSE Enterprise Linux Security Update for util-linux (SUSE-SU-2018:3926-1)).

Upgrading to version 2.32-rc1 eliminates this vulnerability. A possible mitigation has been published 6 days after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (108308) and SecurityFocus (BID 103367†). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.0
VulDB Meta Temp Score: 6.9

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

NVD Base Score: 7.8
NVD Vector: 🔍

CNA Base Score: 7.8
CNA 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: 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: 108308
Nessus Name: Fedora 27 : util-linux (2018-668664ba84)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 870069
OpenVAS Name: Debian Security Advisory DSA 4134-1 (util-linux - security update)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
Exposure Time: 🔍

Upgrade: util-linux 2.32-rc1
Patch: github.com

Timelineinfo

03/06/2018 🔍
03/06/2018 +0 days 🔍
03/07/2018 +1 days 🔍
03/07/2018 +0 days 🔍
03/07/2018 +0 days 🔍
03/07/2018 +0 days 🔍
03/13/2018 +6 days 🔍
03/14/2018 +1 days 🔍
12/13/2024 +2466 days 🔍

Sourcesinfo

Advisory: 75f03badd7ed9f1dd951863d75e756883d3acc55⛔
Status: Confirmed

CVE: CVE-2018-7738 (🔍)
GCVE (CVE): GCVE-0-2018-7738
GCVE (VulDB): GCVE-100-114163

OVAL: 🔍

SecurityFocus: 103367 - util-linux CVE-2018-7738 Local Privilege Escalation Vulnerability

Entryinfo

Created: 03/07/2018 11:02
Updated: 12/13/2024 17:42
Changes: 03/07/2018 11:02 (73), 01/11/2020 08:35 (4), 02/17/2023 09:27 (5), 02/17/2023 09:31 (1), 12/13/2024 17:42 (28)
Complete: 🔍
Cache ID: 216:8E5:103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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