Memory disclosure via duplicate MP4 atom handling
Published Oct 19, 2022 · Updated May 8, 2025
Memory disclosure in affected F5 NGINX products allows local users to expose worker memory through a crafted MP4 file. The MP4 parser accepts duplicate container and track atoms, replacing internal buffer references instead of rejecting the malformed atom sequence. Exposure requires a build with the nondefault module, an active mp4 directive, and access that can make NGINX process attacker-controlled media; malformed input can also crash a worker.
Summary
What happened
Memory disclosure in affected F5 NGINX products allows local users to expose worker memory through a crafted MP4 file. The MP4 parser accepts duplicate container and track atoms, replacing internal buffer references instead of rejecting the malformed atom sequence. Exposure requires a build with the nondefault module, an active mp4 directive, and access that can make NGINX process attacker-controlled media; malformed input can also crash a worker.
The record
- CVE
- CVE-2022-41742
- Published
- Oct 19, 2022
- Updated
- May 8, 2025
- Vendor
- F5 Networks
- Product
- NGINX Open Source
- Classifications
- CWE-787, T1499.004
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Oct 19, 2022CVE publishedPublication date reported by the CVE source.
- May 8, 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?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=Mainline <1.23.2
- Affected versionversion=Stable <1.22.1
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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Public exploit references
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Technologies
Your stack
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Your stack
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