Encoding service interruption via undersized rate-control allocation
Published Jun 18, 2022 · Updated Apr 15, 2025
Out-of-bounds write in the DNxHD encoder in FFmpeg 2.0 allows attackers to interrupt encoding through crafted video parameters. The dnxhd_init_rc function allocates mb_rc for only qmax entries but accesses the qmax-indexed entry when RC_VARIANCE is zero. Exploitation requires an application to run the DNxHD encoder with attacker-influenced parameters; the write can corrupt process memory and interrupt the encoding service.
Summary
What happened
Out-of-bounds write in the DNxHD encoder in FFmpeg 2.0 allows attackers to interrupt encoding through crafted video parameters. The dnxhd_init_rc function allocates mb_rc for only qmax entries but accesses the qmax-indexed entry when RC_VARIANCE is zero. Exploitation requires an application to run the DNxHD encoder with attacker-influenced parameters; the write can corrupt process memory and interrupt the encoding service.
The record
- CVE
- CVE-2014-125002
- Published
- Jun 18, 2022
- Updated
- Apr 15, 2025
- Vendor
- FFmpeg
- Product
- FFmpeg
- Classifications
- CWE-119, CWE-787
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jun 18, 2022CVE publishedPublication date reported by the CVE source.
- Apr 15, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=2.0
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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