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Jul 29, 2021
UPDATE: PetitPotam NTLM Relay Attack
THE THREAT PetitPotam is a variant of the NTLM Relay attack discovered by security researcher Gilles Lionel. It is tracked as an authentication bypass vulnerability in Active Directory (Certificate Services); currently no CVE identifier has been assigned to this vulnerability. Proof of Concept (PoC) code released last week [1] relies on the Encrypting File System Remote (EFSRPC) protocol to…
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Sydney, 12 July, 2021 - Tecala, Australia’s award-winning technology services and IT consulting provider, today announced it has chosen eSentire, the global Authority in Managed Detection and Response (MDR) cybersecurity services, as their exclusive MDR solution provider in Australia and New Zealand. This partnership will enable Tecala to augment its cybersecurity practice and offer enterprises…
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Security advisories — Feb 27, 2019

VirtualBox Zero-Day Released

2 min read

A zero-day vulnerability has been identified in VirtualBox that can be exploited to allow malware to escape from the virtual machine guest to the host machine. The security researcher Sergey Zelenyuk publicly released his findings on November 6th without notifying VirtualBox, meaning that no security patch is available at the time of publishing. Temporary mitigation measures were also released by Sergey (see What you should do about it).

At this time, successful exploitation requires advanced technical skills to develop and chain together with additional privilege escalation exploits. This vulnerability does not affect type-1 hypervisors, meaning cloud environments are not impacted. For these reasons, widespread adoption/exploitation is not expected in the near term.

What we’re doing about it

What you should do about it

Additional information

Virtual machines (VMs) are the emulation of an operating system, which allows users to have multiple separate operating systems on one physical device. Escaping the sandbox refers to malware that is opened on the virtual machine, circumventing security and affecting the underlying operating system. Virtual systems are made to be separate from the underlying system and are often used for malware analysis if escape is possible the threat actor gains access to more information story on the host machine and there is a higher chance of lateral movement to additional machines.

This zero-day vulnerability only affects type-two hypervisor of VirtualBox virtual machines. Type-two hypervisors are generally used for desktop machines, meaning that cloud environments are not affected. Sergey chose to release this vulnerability without notifying VirtualBox due to disagreements with the handling of vulnerability reporting and bug bounties; notably, the amount of time that passes before companies action the reported issue [1].


References:

[1] GitHub: MorteNoir1/virtualbox_e1000_0day VirtualBox E1000 Guest-to-Host Escape
https://github.com/MorteNoir1/virtualbox_e1000_0day