GDM up to 3.29.1 D-Bus Interface use after free

CVSS Meta Temp Score
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CTI Interest Score
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6.4$0-$5k0.00

A vulnerability was found in GDM up to 3.29.1. It has been rated as critical. Affected by this issue is some unknown functionality of the component D-Bus Interface. The manipulation with an unknown input leads to a use after free vulnerability. Using CWE to declare the problem leads to CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. Impacted is confidentiality, integrity, and availability. CVE summarizes:

The daemon in GDM through 3.29.1 does not properly unexport display objects from its D-Bus interface when they are destroyed, which allows a local attacker to trigger a use-after-free via a specially crafted sequence of D-Bus method calls, resulting in a denial of service or potential code execution.

The bug was discovered 08/14/2018. The weakness was shared 08/14/2018 by Chris Coulson (Website). The advisory is available at usn.ubuntu.com. This vulnerability is handled as CVE-2018-14424 since 07/19/2018. Local access is required to approach this attack. A simple authentication is required for exploitation. The technical details are unknown and an exploit is not available.

The vulnerability scanner Nessus provides a plugin with the ID 112146 (SUSE SLED12 / SLES12 Security Update : gdm (SUSE-SU-2018:2527-1)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family SuSE Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 171588 (OpenSUSE Security Update for gdm (openSUSE-SU-2018:2818-1)).

Upgrading 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 (112146).

Productinfo

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Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
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CVSSv3info

VulDB Meta Base Score: 6.5
VulDB Meta Temp Score: 6.4

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

NVD Base Score: 7.8
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Use after free
CWE: CWE-416 / CWE-119
ATT&CK: Unknown

Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

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EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 112146
Nessus Name: SUSE SLED12 / SLES12 Security Update : gdm (SUSE-SU-2018:2527-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Timelineinfo

07/19/2018 🔍
08/13/2018 +25 days 🔍
08/14/2018 +0 days 🔍
08/14/2018 +0 days 🔍
08/14/2018 +0 days 🔍
08/15/2018 +1 days 🔍
08/27/2018 +12 days 🔍
08/28/2018 +1 days 🔍
05/02/2023 +1708 days 🔍

Sourcesinfo

Advisory: 401
Researcher: Chris Coulson
Status: Not defined
Confirmation: 🔍

CVE: CVE-2018-14424 (🔍)
OVAL: 🔍

SecurityFocus: 105179 - GNOME GDM CVE-2018-14424 Local Code Execution Vulnerability

Entryinfo

Created: 08/15/2018 06:38
Updated: 05/02/2023 08:57
Changes: 08/15/2018 06:38 (73), 03/15/2020 16:34 (6), 05/02/2023 08:56 (4), 05/02/2023 08:57 (1)
Complete: 🔍

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