Local plaintext disclosure via permissive temporary files
Published Jan 9, 2025 · Updated Feb 15, 2025
Information disclosure in Rails Active Support 5.2.0 through 6.1.7.4 and 7.0.0 through 7.0.7 allows local users to read plaintext. ActiveSupport::EncryptedFile#writing places decrypted contents in a predictable system-temporary path using binwrite, so the file inherits permissions from the process umask instead of enforcing mode 0600. Exploitation requires local filesystem access during an encrypted-file edit and exposes only the temporary plaintext present during that window.
Summary
What happened
Information disclosure in Rails Active Support 5.2.0 through 6.1.7.4 and 7.0.0 through 7.0.7 allows local users to read plaintext. ActiveSupport::EncryptedFile#writing places decrypted contents in a predictable system-temporary path using binwrite, so the file inherits permissions from the process umask instead of enforcing mode 0600. Exploitation requires local filesystem access during an encrypted-file edit and exposes only the temporary plaintext present during that window.
The record
- CVE
- CVE-2023-38037
- Published
- Jan 9, 2025
- Updated
- Feb 15, 2025
- Vendor
- Rails
- Product
- Active Support
- Classifications
- CWE-377, CWE-732, T1005
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Jan 9, 2025CVE publishedPublication date reported by the CVE source.
- Feb 15, 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=>= 5.2.0 <>= 5.2.0
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