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Home > Cybersecurity > 0patch fixes RemotePotato0 flaw that Microsoft refuses to patch

0patch fixes RemotePotato0 flaw that Microsoft refuses to patch

A Windows local privilege escalation flaw has been fixed by security companies after Microsoft did not fix it for 9 months.


Rusen Gobel Rusen Gobel
January 14, 2022
2 min read
0patch fixes RemotePotato0 flaw that Microsoft refuses to patch

There is a new security flaw affecting the widely-used Windows versions dubbed RemotePotato0. The flaw has no CVE tracking ID because Microsoft refuses to fix it. But the third-party zero-day security solution company 0patch has released an update on its software to fix the vulnerability.

The potato is around for a while

RemotePotato0 was first discovered 9 months ago; on April 2021 by SentinelOne researchers. The vulnerability allows attackers with standard privileges to elevate their account to higher tiers, like Admin. Converting a standard account to admin opens the door to endless possibilities of attack surfaces, which makes it a very important and dangerous flaw.

0patch has shown the attack and its mitigation via software with a video. In the first part of the video, you can see the user is a standard domain user. After the deployment of the RemotePotato0.exe file via command lines, the standard domain user also becomes an enterprise admin. In the second half of the video, 0patch shows their software denying this process.

Mitja Kolsek, co-founder of 0patch said:

Mitja Kolsek, co-founder of 0patch
Mitja Kolsek, co-founder of 0patch

« RemotePotato0 flaw allows a logged-in low-privileged attacker to launch one of several special-purpose applications in the session of any other user who is also currently logged in to the same computer, and make that application send said user’s NTLM hash to an IP address chosen by the attacker. Intercepting an NTLM hash from a domain administrator, the attacker can craft their own request for the domain controller pretending to be that administrator and perform some administrative action such as adding themselves to the Domain Administrators group. »

Microsoft’s refusal of the fix for the flaw is somehow understandable. Windows NT Lan Manager (NTLM) is an old protocol and seems like Microsoft wants to abandon it. NTLM is still used generally for backward compatibility. Microsoft advises users to disable it if it is not needed. However, the protocol is still being commonly used on several Windows versions, including Windows 7 and Windows 10.

You can register to gain access to the mitigation tool of 0patch for the RemotePotato0 flaw

See more Cybersecurity News


Tags: Microsoft
Rusen Gobel

Rusen Gobel

Rusen Gobel is a news editor at Cloud7 News. With more than 10 years of experience, Rusen worked as a hardware and software news editor for technology sites such as Shiftdelete, Teknokolis, Hardware Plus, BT Haber. In addition, Rusen publishes consumer product reviews on his YouTube channel. While consumer electronics has been his main focus for years, now Rusen is more interested in WordPress and software development. He had contributed different web application projects in his professional career. Rusen had graduated from Istanbul University, department of Computer Engineering. Rusen has a very high passion for learning and writing for every kind of technology. That's why he has been working as a tech editor for more than ten years on several different technology magazines and online news portals.

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