Service crash via whole-file hash calculation
Published Apr 3, 2023 · Updated Feb 11, 2025
Uncontrolled resource consumption in Wagtail before 4.1.4 and 4.2 through 4.2.1 allows remote authenticated users to crash the service. Image and document metadata handling reads an entire uploaded file into memory before passing its contents to SHA-1 hashing, exhausting process memory on sufficiently large files. An administrator with image or document upload permission must submit the file; ordinary site visitors cannot reach the path.
Summary
What happened
Uncontrolled resource consumption in Wagtail before 4.1.4 and 4.2 through 4.2.1 allows remote authenticated users to crash the service. Image and document metadata handling reads an entire uploaded file into memory before passing its contents to SHA-1 hashing, exhausting process memory on sufficiently large files. An administrator with image or document upload permission must submit the file; ordinary site visitors cannot reach the path.
The record
- CVE
- CVE-2023-28837
- Published
- Apr 3, 2023
- Updated
- Feb 11, 2025
- Vendor
- Wagtail
- Product
- Wagtail
- Classifications
- CWE-400, T1499
- Attack vector
- network
- Privileges
- admin
Timeline
How it unfolded
- Apr 3, 2023CVE publishedPublication date reported by the CVE source.
- Feb 11, 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=< 4.1.4
- Affected versionversion=>= 4.2, < 4.2.2
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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Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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