FaceTime – RTP Video Processing Heap Corruption

• Exploit Database
• 33 阅读

• 作者： Google Security Research
  日期： 2018-11-06
• 类别：

  • dos
  平台：

  • ios
• 来源：https://www.exploit-db.com/exploits/45786/

• There is a memory corruption issue when processing a malformed RTP video stream in FaceTime that leads to a kernel panic due to a corrupted heap cookie or data abort. This bug can be reached if a user accepts a call from a malicious caller. This issue only affects FaceTime on iOS, it does not crash on a Mac.
  
  The issue can be reproduced using the attached sequence of RTP packets. To reproduce the issue:
  
  1) Build video-replay.c in attached zip (gcc -g -dynamiclib -o mylib video-replay.c) and copy to /usr/lib/mylib
  2) Use insert_dylib (https://github.com/Tyilo/insert_dylib) to add /usr/lib/mylib to AVConference (insert_dylib --strip-codesig /usr/lib/mylib AVConference)
  3) Edit /System/Library/Sandbox/Profiles/com.apple.avconferenced.sb to add /out as allow file read and write
  4) Restart the machine
  5) Extract the attached out folder in the zip to /out and change the permissions so it's readable by AVConference
  6) Call target, when they pick up, the phone will crash
  
  
  Proof of Concept:
  https://gitlab.com/exploit-database/exploitdb-bin-sploits/-/raw/main/bin-sploits/45786.zip