DisplayLink Core Software Cleaner 8.2.1956 Uninstaller cl_1956.exe untrusted search path

Summaryinfo

A vulnerability described as problematic has been identified in DisplayLink Core Software Cleaner 8.2.1956. Affected by this vulnerability is an unknown functionality of the file cl_1956.exe of the component Uninstaller. The manipulation results in untrusted search path. This vulnerability was named CVE-2018-7884. The attack needs to be approached locally. There is no available exploit.

Detailsinfo

A vulnerability classified as critical has been found in DisplayLink Core Software Cleaner 8.2.1956. Affected is an unknown code block of the file cl_1956.exe of the component Uninstaller. The manipulation with an unknown input leads to a untrusted search path vulnerability. CWE is classifying the issue as CWE-426. The product searches for critical resources using an externally-supplied search path that can point to resources that are not under the product's direct control. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

An issue was discovered in DisplayLink Core Software Cleaner Application 8.2.1956. When the drivers are updated to a newer version, the product launches a process as SYSTEM to uninstall the old version: cl_1956.exe is run as SYSTEM on the %systemroot%\Temp folder, where any user can write a DLL (e.g., version.dll) to perform DLL Hijacking and elevate privileges to SYSTEM.

The bug was discovered 06/01/2018. The weakness was presented 06/05/2018 as not defined mailinglist post (Full-Disclosure). The advisory is available at seclists.org. This vulnerability is traded as CVE-2018-7884 since 03/08/2018. Local access is required to approach this attack. The requirement for exploitation is a authentication. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1574 by the MITRE ATT&CK project.

The vulnerability was handled as a non-public zero-day exploit for at least 4 days. During that time the estimated underground price was around $0-$5k.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Vendor

• DisplayLink

Name

• Core Software Cleaner

Version

• 8.2.1956

CPE 2.3info

• 🔍

CPE 2.2info

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