Memory disclosure or crash via truncated EXIF marker
Published Apr 1, 2020 · Updated Sep 16, 2024
Out-of-bounds read in PHP 7.2 before 7.2.29, 7.3 before 7.3.16, and 7.4 before 7.4.4 allows attackers to read memory or crash via crafted EXIF data. exif_process_TIFF_in_JPEG compares a two-byte byte-order marker when only one input byte remains, causing a one-byte out-of-bounds read. Reachability requires an application to pass attacker-controlled JPEG data to exif_read_data(); the bounded consequences are memory disclosure or process termination.
Summary
What happened
Out-of-bounds read in PHP 7.2 before 7.2.29, 7.3 before 7.3.16, and 7.4 before 7.4.4 allows attackers to read memory or crash via crafted EXIF data. exif_process_TIFF_in_JPEG compares a two-byte byte-order marker when only one input byte remains, causing a one-byte out-of-bounds read. Reachability requires an application to pass attacker-controlled JPEG data to exif_read_data(); the bounded consequences are memory disclosure or process termination.
The record
- CVE
- CVE-2020-7064
- Published
- Apr 1, 2020
- Updated
- Sep 16, 2024
- Vendor
- The PHP Group
- Product
- PHP
- Classifications
- CWE-125
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Apr 1, 2020CVE publishedPublication date reported by the CVE source.
- Sep 16, 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?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=7.2.x <7.2.29
- Affected versionversion=7.3.x <7.3.16
- Affected versionversion=7.4.x <7.4.4
What conditions does exploitation require?
What is affected?
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
- PHP bug 79282 minimal EXIF reproducerproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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