The Qualcomm DSP Driver - Unexpectedly Excavating an Exploit
Summary: Google Project Zero analyzed kernel panic logs that TAG received from Amnesty International after an in-the-wild exploit, and the logs led to the discovery of 6 vulnerabilities in Qualcomm's adsprpc driver over 2.5 months, one of which TAG reported as exploited in the wild. Without the exploit sample itself, the team worked from 6 panics, 4 of them useful, which showed a corrupted channel id set to the Unix timestamp 1702834303 (December 17, 2023) and crashes in fastrpc_mmap_free, fastrpc_file_free, inotify, and pipe_read.
Why it matters: The exploit was reconstructed from crash logs alone, with no sample in hand, and the corrupted channel id carried a timestamp close to when the exploit was thrown - a reminder that a single Qualcomm DSP driver yielded 6 vulnerabilities in 2.5 months of looking.
Read the original at Google Project Zero ↗
- Topics
- Vulnerabilities & Patching
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