Application interruption via EXIF thumbnail bounds-check wraparound
Published Jan 9, 2024 · Updated May 14, 2025
Integer overflow in FreeImage 3.18.0 EXIF parsing allows attackers to interrupt applications that open a crafted JPEG image. jpeg_read_exif_dir adds attacker-controlled thumbnail offset and size values in a 32-bit bounds check; wraparound makes an out-of-range sum appear smaller than the file length. Subsequent thumbnail loading derives an invalid memory pointer and copies 4,096 bytes, so exploitation requires an application using the library to open the image and can interrupt that application.
Summary
What happened
Integer overflow in FreeImage 3.18.0 EXIF parsing allows attackers to interrupt applications that open a crafted JPEG image. jpeg_read_exif_dir adds attacker-controlled thumbnail offset and size values in a 32-bit bounds check; wraparound makes an out-of-range sum appear smaller than the file length. Subsequent thumbnail loading derives an invalid memory pointer and copies 4,096 bytes, so exploitation requires an application using the library to open the image and can interrupt that application.
The record
- CVE
- CVE-2023-47996
- Published
- Jan 9, 2024
- Updated
- May 14, 2025
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-190, T1499.004
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jan 9, 2024CVE publishedPublication date reported by the CVE source.
- May 14, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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What conditions does exploitation require?
What is affected?
Affected products and versions are unavailable in this record.
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
- FreeImage CVE-2023-47996 proof of conceptproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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