Microsoft Windows up to Server 2019 Media Service privileges management

Summaryinfo

A vulnerability classified as critical was found in Microsoft Windows. This impacts an unknown function of the component Media Service. Such manipulation leads to privileges management. This vulnerability is uniquely identified as CVE-2020-0641. The attack can be launched remotely. No exploit exists. It is advisable to implement a patch to correct this issue.

Detailsinfo

A vulnerability was found in Microsoft Windows (Operating System). It has been rated as critical. Affected by this issue is an unknown function of the component Media Service. The manipulation with an unknown input leads to a privileges management vulnerability. Using CWE to declare the problem leads to CWE-269. The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. Impacted is confidentiality, integrity, and availability. CVE summarizes:

An elevation of privilege vulnerability exists in Windows Media Service that allows file creation in arbitrary locations.To exploit the vulnerability, an attacker would first have to log on to the system, aka 'Microsoft Windows Elevation of Privilege Vulnerability'.

The weakness was disclosed 01/14/2020 as confirmed security update guide (Website). The advisory is shared for download at portal.msrc.microsoft.com. The public release has been coordinated in cooperation with the vendor. This vulnerability is handled as CVE-2020-0641. The attack may be launched remotely. The successful exploitation requires a simple authentication. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $5k-$25k (estimation calculated on 01/15/2020). The MITRE ATT&CK project declares the attack technique as T1068. The advisory points out:

An elevation of privilege vulnerability exists in Windows Media Service that allows file creation in arbitrary locations.

Applying a patch is able to eliminate this problem. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The entries VDB-148654, VDB-148653, VDB-148651 and VDB-148650 are pretty similar. Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

• Operating System

Vendor

• Microsoft

Name

• Windows

Version

• 8.1
• 10
• 10 1607
• 10 1703
• 10 1709
• 10 1803
• 10 1809
• 10 1903
• 10 1909
• RT 8.1
• Server 1803
• Server 1903
• Server 1909
• Server 2012 R2
• Server 2016
• Server 2019

License

• commercial

Website

• Vendor: https://www.microsoft.com/
• Product: https://www.microsoft.com/en-us/windows

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

Once again VulDB remains the best source for vulnerability data.

Discussion