Microsoft Windows finger.exe privileges management

Summaryinfo

A vulnerability marked as problematic has been reported in Microsoft Windows. This issue affects some unknown processing of the file finger.exe. The manipulation leads to privileges management. Remote exploitation of the attack is possible. Furthermore, an exploit is available.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in Microsoft Windows (Operating System) (the affected version is unknown). This issue affects an unknown code of the file finger.exe. 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.

The weakness was published 09/11/2020 by John Page (hyp3rlinx) (Website). The advisory is shared at hyp3rlinx.altervista.org. The attack may be initiated remotely. A simple authentication is needed for exploitation. Technical details as well as a public exploit are known. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 09/19/2020). MITRE ATT&CK project uses the attack technique T1068 for this issue. The advisory points out:

Microsoft Windows TCPIP Finger Command "finger.exe" that ships with the OS, can be used as a file downloader and makeshift C2 channel.

A public exploit has been developed by John Page (hyp3rlinx) in Python and been published immediately after the advisory. The exploit is available at hyp3rlinx.altervista.org. It is declared as proof-of-concept. We expect the 0-day to have been worth approximately $25k-$100k.

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

The vulnerability is also documented in the vulnerability database at Exploit-DB (48815). seclists.org is providing further details. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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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Submitinfo

Accepted

• Submit #191: Windows TCPIP Finger Command "finger.exe" / C2 Channel and Bypassing Security Software (by hyp3rlinx)

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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