Unintended file write via unchecked relative paths
Published Apr 3, 2024 · Updated Mar 25, 2025
Improper filename validation in OpenSSH 7.4 for Amazon Linux 1 and 2 allows remote attackers to write unintended files through scp. The scp client checks received filenames against the requested name only when the request uses an absolute path, leaving relative-path transfers unchecked. Exploitation requires a user to retrieve a relative path from an attacker-controlled SSH server, which can place an unexpected file in the transfer destination.
Summary
What happened
Improper filename validation in OpenSSH 7.4 for Amazon Linux 1 and 2 allows remote attackers to write unintended files through scp. The scp client checks received filenames against the requested name only when the request uses an absolute path, leaving relative-path transfers unchecked. Exploitation requires a user to retrieve a relative path from an attacker-controlled SSH server, which can place an unexpected file in the transfer destination.
The record
- CVE
- CVE-2023-35812
- Published
- Apr 3, 2024
- Updated
- Mar 25, 2025
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- Unavailable
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Apr 3, 2024CVE publishedPublication date reported by the CVE source.
- Mar 25, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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What is affected?
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Published CVSS scores
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Attacks
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Weakness, pattern, technique
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Public exploit references
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Technologies
Your stack
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Your stack
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