Out-of-bounds read via AVI size integer overflow
Published Jul 26, 2021 · Updated Aug 3, 2024
Out-of-bounds read in VideoLAN VLC Media Player 3.0.11 allows attackers to expose process memory via a crafted AVI file. The AVI_ExtractSubtitle size check adds six to an untrusted 32-bit payload length, so integer wraparound can accept a payload larger than the remaining buffer before it reaches vlc_input_attachment_New. A user must open the crafted file; the invalid read can expose adjacent process memory and interrupt the player, without a documented write primitive.
Summary
What happened
Out-of-bounds read in VideoLAN VLC Media Player 3.0.11 allows attackers to expose process memory via a crafted AVI file. The AVI_ExtractSubtitle size check adds six to an untrusted 32-bit payload length, so integer wraparound can accept a payload larger than the remaining buffer before it reaches vlc_input_attachment_New. A user must open the crafted file; the invalid read can expose adjacent process memory and interrupt the player, without a documented write primitive.
The record
- CVE
- CVE-2021-25803
- Published
- Jul 26, 2021
- Updated
- Aug 3, 2024
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-190
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jul 26, 2021CVE publishedPublication date reported by the CVE source.
- Aug 3, 2024Record updatedLatest update available in the CVE record.
Exploitability
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What is affected?
Affected products and versions are unavailable in this record.
Attacks
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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