Researchers at 0patch released a temporary micropatch for the unpatched BearLPE local privilege escalation zero-day flaw in Windows 10.
Experts at 0patch released a micropatch to temporary fix a still-unpatched local privilege escalation on systems without rebooting them.
The zero-day vulnerability, dubbed BearLPE, was recently disclosed by the security researcher SandboxEscaper.
The following video shows how the micropatch, composed of just five instructions, works on a vulnerable machine:
The exploit published by the expert triggers the flaw that resides in the Task Scheduler of Windows 10.
SandboxEscaper discovered that even starting with limited privileges it is possible to get SYSTEM rights by invoking a specific function. SandboxEscaper published a video PoC of the Windows zero-day that shows how to trigger it on Windows x86.
Will Dormann, vulnerability analyst at CERT/CC, confirmed that the Windows zero-day works on a fully patched (May 2019) Windows 10 x86 system.
According to Will Dormann, a vulnerability analyst at CERT/CC, the exploit is 100% reliable on x86 systems and needs to be recompiled for x64 machines.
“When you run Windows XP schtasks.exe on Windows 10, legacy RPC functions are called – which in turn call the current ones, such as SchRpcSetSecurity,” explained 0patch co-founder Mitja Kolsek.ù
Pierluigi Paganini is member of the ENISA (European Union Agency for Network and Information Security) Threat Landscape Stakeholder Group and Cyber G7 Group, he is also a Security Evangelist, Security Analyst and Freelance Writer.
Editor-in-Chief at "Cyber Defense Magazine", Pierluigi is a cyber security expert with over 20 years experience in the field, he is Certified Ethical Hacker at EC Council in London. The passion for writing and a strong belief that security is founded on sharing and awareness led Pierluigi to find the security blog "Security Affairs" recently named a Top National Security Resource for US.
Pierluigi is a member of the "The Hacker News" team and he is a writer for some major publications in the field such as Cyber War Zone, ICTTF, Infosec Island, Infosec Institute, The Hacker News Magazine and for many other Security magazines.
Author of the Books "The Deep Dark Web" and “Digital Virtual Currency and Bitcoin”.