Microsoft Windows Group File code injection

Summaryinfo

A vulnerability was found in Microsoft Windows. It has been rated as critical. This affects an unknown part of the component Group File Handler. The manipulation leads to code injection. Remote exploitation of the attack is possible. Furthermore, an exploit is available.

Detailsinfo

A vulnerability was found in Microsoft Windows (Operating System) (version unknown). It has been rated as critical. This issue affects an unknown function of the component Group File Handler. The manipulation with an unknown input leads to a code injection vulnerability. Using CWE to declare the problem leads to CWE-94. The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment. Impacted is confidentiality, integrity, and availability.

The weakness was published 01/01/2020 by John Page (Website). The advisory is shared at hyp3rlinx.altervista.org. The public release happened without involvement of Microsoft. The exploitation is known to be difficult. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. It demands that the victim is doing some kind of user interaction. Technical details are unknown but a public exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 08/10/2020). MITRE ATT&CK project uses the attack technique T1059 for this issue. The advisory points out:

Windows ".group" files are related to Contact files and suffer from unexpected code execution when clicking the "Contact Group Details" tab Website Go button. This happens if the website URL field points to an executable file. This is the same type of vulnerability affecting Windows .contact files that remains unfixed as of the time of this writing and has a metasploit module available.

After immediately, there has been an exploit disclosed. The exploit is available at hyp3rlinx.altervista.org. It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 350 days. During that time the estimated underground price was around $25k-$100k.

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

Similar entry is available at VDB-159426. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

• Operating System

Vendor

• Microsoft

Name

• Windows

License

• commercial

Website

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

CPE 2.3info

• 🔍

CPE 2.2info

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Entryinfo

Submitinfo

Accepted

• Submit #137: Microsoft Windows .Group File / URL Field Code Execution (by hyp3rlinx)

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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