Process crash via truncated tremolo table allocation
Published May 26, 2021 · Updated Aug 4, 2024
Heap-buffer overflow in the tremolo audio filter in FFmpeg 4.2 allows remote attackers to crash a processing application with crafted audio. The config_input function allocates its lookup table by truncating sample_rate divided by frequency, but its fill loop reevaluates the nonintegral quotient and writes one element beyond that allocation. Exploitation requires user interaction and an application that processes attacker-supplied audio through the tremolo filter; the documented consequence is a process-level service interruption.
Summary
What happened
Heap-buffer overflow in the tremolo audio filter in FFmpeg 4.2 allows remote attackers to crash a processing application with crafted audio. The config_input function allocates its lookup table by truncating sample_rate divided by frequency, but its fill loop reevaluates the nonintegral quotient and writes one element beyond that allocation. Exploitation requires user interaction and an application that processes attacker-supplied audio through the tremolo filter; the documented consequence is a process-level service interruption.
The record
- CVE
- CVE-2020-22026
- Published
- May 26, 2021
- Updated
- Aug 4, 2024
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-120, T1499.004
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- May 26, 2021CVE publishedPublication date reported by the CVE source.
- Aug 4, 2024Record updatedLatest update available in the CVE record.
Exploitability
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Attacks
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Technologies
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