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The CVE-2025-XXXXX vulnerability in Soft Serve’s SSH server implementation stems from improper validation of file paths during file write operations initiated via specific SSH commands. An attacker can exploit a flaw in the API handling by crafting a malicious SSH request containing directory traversal sequences (e.g., ../../). The application fails to properly sanitize this input, allowing the request to break out of the intended target directory. Consequently, the server processes the request and writes uncontrolled data to an arbitrary filesystem location specified by the attacker, such as /tmp/pwned, leading to unauthorized file creation or modification.
Platform: Soft Serve
Version: < v0.12.2
Vulnerability: Arbitrary File Write
Severity: High
date: 2025-09-02
Prediction: Patch by 2025-09-09
What Undercode Say:
PoC Command echo 'data' | ssh -T -p 23231 user@host "server-command ../../../../tmp/pwned" Check for vulnerable versions grep "version" ~/soft-serve/config.yaml Mitigation test post-patch diff <(ssh -T -p 23231 user@host "server-command test") expected_output.txt
How Exploit:
Craft SSH request with path traversal sequences to write data outside the intended repository directory.
Protection from this CVE:
Update to v0.12.2+. Implement input sanitization for file paths.
Impact:
Unauthorized file creation/modification leading to potential system compromise, data loss, or service disruption.
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Sources:
Reported By: github.com
Extra Source Hub:
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