Use-After-Free in Voice Control: CVE-2021-30902 Write-up

Use-After-Free in Voice Control: CVE-2021-30902 Write-up

By: 08Tc3wBB

Voice Control is a powerful feature introduced by Apple in iOS 13 and macOS Catalina. It acts as a substitute for all the touch gestures on the screen, letting you interact with the device using your voice to tap, swipe, type, and more.

com.apple.SpeechRecognitionCore.speechrecognitiond Crashes

com.apple.SpeechRecognitionCore.speechrecognitiond is a system XPCService process that handles voice control. 

During an investigation of ZecOps Mobile XDR / Mobile DFIR, we discovered a series of crashes that appears intriguing:

Exception Type:  EXC_BAD_ACCESS (SIGBUS)
Exception Subtype: EXC_ARM_DA_ALIGN at 0x0074616f6c460003

Exception Type:  EXC_BAD_ACCESS (SIGSEGV)
Exception Subtype: KERN_INVALID_ADDRESS at 0x2000002400000000 -> 0x0000002400000000 

Exception Type:  EXC_BAD_ACCESS (SIGSEGV)
Exception Subtype: KERN_INVALID_ADDRESS at 0x00000000100c02d8

Mobile Device Investigation Analysis

Not all crashes are the same, but they all have a similar pattern.

Continue reading Use-After-Free in Voice Control: CVE-2021-30902 Write-up at ZecOps Blog.

This article has been indexed from ZecOps Blog

Read the original article:

Tags: