File substitution via MD5-based upload deduplication
Published Jan 6, 2025 · Updated Jan 6, 2025
Weak file hashing in FileService.java in moyangzhan LangChain4j-AIDeepin before 3.5.0 allows remote attackers to cause upload conflicts. The writeToLocal method uses an MD5 digest as the database lookup and deduplication key, so distinct uploaded files with the same digest resolve to one stored file record. Network access to the upload path is sufficient; a chosen MD5 collision can make a user receive previously stored content instead of the intended upload.
Summary
What happened
Weak file hashing in FileService.java in moyangzhan LangChain4j-AIDeepin before 3.5.0 allows remote attackers to cause upload conflicts. The writeToLocal method uses an MD5 digest as the database lookup and deduplication key, so distinct uploaded files with the same digest resolve to one stored file record. Network access to the upload path is sufficient; a chosen MD5 collision can make a user receive previously stored content instead of the intended upload.
The record
- CVE
- CVE-2025-21604
- Published
- Jan 6, 2025
- Updated
- Jan 6, 2025
- Vendor
- moyangzhan
- Product
- LangChain4j-AIDeepin
- Classifications
- CWE-328
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jan 6, 2025CVE publishedPublication date reported by the CVE source.
- Jan 6, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=< 3.5.0
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
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
No public exploit references are available in this record.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
Check the software in your environment
Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.
Book a demo