Home windows, Ubuntu, Zoom, Safari, MS Change Hacked at Pwn2Own 2021

The 2021 spring version of Pwn2Own hacking contest concluded final week on April 8 with a three-way tie between Crew Devcore, OV, and Computest researchers Daan Keuper and Thijs Alkemade.

A complete of $1.2 million was awarded for 16 high-profile exploits over the course of the three-day digital occasion organized by the Zero Day Initiative (ZDI).

Targets with profitable makes an attempt included Zoom, Apple Safari, Microsoft Change, Microsoft Groups, Parallels Desktop, Home windows 10, and Ubuntu Desktop working programs.

password auditor

A number of the main highlights are as follows —

  • Utilizing an authentication bypass and an area privilege escalation to fully take over a Microsoft Change server, for which the Devcore staff netted $200,000
  • Chaining a pair of bugs to realize code execution in Microsoft Groups, incomes researcher OV $200,000
  • A zero-click exploit concentrating on Zoom that employed a three-bug chain to take advantage of the messenger app and acquire code execution on the goal system. ($200,000)
  • The exploitation of an integer overflow flaw in Safari and an out-of-bounds write to get kernel-level code execution ($100,000)
  • An exploit aimed on the V8 JavaScript rendering engine to hack Google Chrome and Microsoft Edge (Chromium) browsers ($100,000)
  • Leveraging use-after-free, race situation, and integer overflow bugs in Home windows 10 to escalate from a daily person to SYSTEM privileges ($40,000 every)
  • Combining three flaws — an uninitialized reminiscence leak, a stack overflow, and an integer overflow — to flee Parallels Desktop and execute code on the underlying working system ($40,000)
  • Exploiting a reminiscence corruption bug to efficiently execute code on the host working system from inside Parallels Desktop ($40,000)
  • The exploitation of an out-of-bounds entry bug to raise from an ordinary person to root on Ubuntu Desktop ($30,000)

The Zoom vulnerabilities exploited by Daan Keuper and Thijs Alkemade of Computest Safety are notably noteworthy as a result of the failings require no interplay of the sufferer apart from being a participant on a Zoom name. What’s extra, it impacts each Home windows and Mac variations of the app, though it is not clear if Android and iOS variations are weak as nicely.

Technical particulars of the failings are but to be disclosed, however in a statement sharing the findings, the Dutch safety agency stated the researchers “have been then capable of virtually fully take over the system and carry out actions akin to turning on the digital camera, turning on the microphone, studying emails, checking the display screen and downloading the browser historical past.”

password auditor

When reached for a response, Zoom stated it is pushed a server-side change to patch the bugs, noting that it is engaged on incorporating additional protections to resolve the safety shortcomings. The corporate has a 90-day window to handle the problems earlier than they’re made public.

“On April 9, we launched a server-side replace that defends towards the assault demonstrated at Pwn2Own on Zoom Chat,” a spokesperson for the corporate informed The Hacker Information. “This replace doesn’t require any motion by our customers. We’re persevering with to work on extra mitigations to completely handle the underlying points.”

The corporate additionally stated it is not conscious of any proof of lively exploitation by these points, whereas declaring the failings do not affect in-session chat in Zoom Conferences, and that the “assault can solely be executed by an exterior contact that the goal has beforehand been accepted or be part of the goal’s identical organizational account.”

Impartial researcher Alisa Esage additionally made historical past as the primary girl to win Pwn2Own after discovering a bug in virtualization software program Parallels. However she was solely awarded a partial win for causes that the problem had been reported to ZDI previous to the occasion.

“I can solely settle for it as a indisputable fact that my profitable Pwn2Own participation attracted scrutiny to sure controversial and probably outdated factors within the contest guidelines,” Esage tweeted, including, “In the true world there is no such thing as a such factor as an ‘controversial level’. An exploit both breaks the goal system or not.”

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