Heap corruption via unchecked JPEG component buffer write
Published Apr 14, 2022 · Updated Apr 15, 2025
Heap-based buffer overflow in Accusoft ImageGear 19.10 allows attackers to corrupt memory by loading a crafted lossless JPEG file. The process_jpeg_lossless function lacks a boundary check and writes a word beyond a component buffer when SOF3 precision is at least 9. A host application must pass the file to the JPEG parser; Talos demonstrated an out-of-bounds write and access violation.
Summary
What happened
Heap-based buffer overflow in Accusoft ImageGear 19.10 allows attackers to corrupt memory by loading a crafted lossless JPEG file. The process_jpeg_lossless function lacks a boundary check and writes a word beyond a component buffer when SOF3 precision is at least 9. A host application must pass the file to the JPEG parser; Talos demonstrated an out-of-bounds write and access violation.
The record
- CVE
- CVE-2021-21947
- Published
- Apr 14, 2022
- Updated
- Apr 15, 2025
- Vendor
- Accusoft
- Product
- ImageGear
- Classifications
- CWE-129, CWE-122
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Apr 14, 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?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=19.10
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
- Cisco Talos malformed JPEG proof of conceptproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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