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Venture Zero Flags ‘Patch Hole’ Issues on Android

By Ryan Naraine on November 28, 2022

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Vulnerability researchers at Google Venture Zero are calling consideration to the continuing “patch-gap” downside within the Android ecosystem, warning that downstream distributors proceed to be tardy at delivering safety fixes to Android-powered gadgets.

In a analysis notice documenting the invention of an in-the-wild Android exploit focusing on a flaw within the ARM Mali GPU driver, Venture Zero hacker Ian Beer mentioned safety updates out there since August 2022 have nonetheless not been pushed to affected Android gadgets.

Beer recognized his personal firm’s Pixel alongside gadgets from Samsung, Xiaomi and Oppo that stay uncovered to exploitable software program vulnerabilities which were publicly recognized for a number of months.

Beer mentioned Venture Zero initiated a safety audit of the ARM Mali GPU driver after watching an inner presentation forward of Maddie Stone’s FirstCon22 speech that described in-the-wild exploitation of low-level reminiscence administration code utilized in tens of millions of Android gadgets. 

[ READ: Microsoft Finds Major Flaws in Pre-Installed Android Apps ]

In the midst of just a few weeks, Beer mentioned his workforce found 5 further exploitable vulnerabilities within the ARM code, warning that reminiscence issues of safety might result in code execution and permissions mannequin bypass assaults.

“We reported these 5 points to ARM once they have been found between June and July 2022. ARM mounted the problems promptly in July and August 2022, disclosing them as safety points on their Arm Mali Driver Vulnerabilities web page (assigning CVE-2022-36449) and publishing the patched driver supply on their public developer web site,” Beer defined.

In keeping with its disclosure coverage, Venture Zero waited a further 30 days earlier than going public with the discoveries.

“When time permits and as a further test, we check the effectiveness of the patches that the seller has supplied. This typically results in follow-up bug studies the place a patch is incomplete or a variant is found and typically we uncover the repair is not there in any respect,” Beer added.

[ READ: Mobile Platforms ‘Actively Obstructing’ Zero-Day Research ]

On this case, he mentioned Venture Zero check gadgets that used Mali are nonetheless susceptible to those points.  “CVE-2022-36449 is just not talked about in any downstream safety bulletins,” he declared.

“Simply as customers are really helpful to patch as shortly as they will as soon as a launch containing safety updates is obtainable, so the identical applies to distributors and corporations. Minimizing the “patch hole” as a vendor in these eventualities is arguably extra essential, as finish customers (or different distributors downstream) are blocking on this motion earlier than they will obtain the safety advantages of the patch,” Beer added.

The Android and Pixel safety groups say the repair supplied by ARM is slated to be delivered “within the coming weeks.”

“The repair supplied by ARM is presently present process testing for Android and Pixel gadgets and shall be delivered within the coming weeks. Android OEM companions shall be required to take the patch to adjust to future SPL necessities,” in keeping with a bug-tracking replace.

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