Memory corruption via unchecked TIFF raster pointer
Published Jul 8, 2021 · Updated Aug 3, 2024
Out-of-bounds write in Accusoft ImageGear 19.9 allows context-dependent attackers to corrupt memory through a malformed TIF file. GetCopyBufferAllocatedWithPixpos returns copy_buffer_allocated plus attacker-controlled raster_size times pixpos without checking the computed address. A host application must load a TIF containing bits_per_sample and T4options tags; the resulting write crashes or compromises its process.
Summary
What happened
Out-of-bounds write in Accusoft ImageGear 19.9 allows context-dependent attackers to corrupt memory through a malformed TIF file. GetCopyBufferAllocatedWithPixpos returns copy_buffer_allocated plus attacker-controlled raster_size times pixpos without checking the computed address. A host application must load a TIF containing bits_per_sample and T4options tags; the resulting write crashes or compromises its process.
The record
- CVE
- CVE-2021-21794
- Published
- Jul 8, 2021
- Updated
- Aug 3, 2024
- Vendor
- Accusoft
- Product
- ImageGear
- Classifications
- CWE-787, CWE-119, T1204.002, T1203
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jul 8, 2021CVE publishedPublication date reported by the CVE source.
- Aug 3, 2024Record 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=Accusoft ImageGear 19.9
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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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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