Authenticated command execution via SSH env request
Published Jul 4, 2024 · Updated Aug 28, 2024
Argument injection in Gogs 0.13.0 and earlier allows remote authenticated users to execute commands through its built-in SSH server. The env request handler in internal/ssh/ssh.go passes an attacker-controlled name and value to env, allowing split-string option parsing to create a command. Exploitation requires the built-in SSH server, a valid account key, and an env utility with split-string support; commands run as RUN_USER, while Windows is unaffected.
Summary
What happened
Argument injection in Gogs 0.13.0 and earlier allows remote authenticated users to execute commands through its built-in SSH server. The env request handler in internal/ssh/ssh.go passes an attacker-controlled name and value to env, allowing split-string option parsing to create a command. Exploitation requires the built-in SSH server, a valid account key, and an env utility with split-string support; commands run as RUN_USER, while Windows is unaffected.
The record
- CVE
- CVE-2024-39930
- Published
- Jul 4, 2024
- Updated
- Aug 28, 2024
- Vendor
- Gogs
- Product
- Gogs
- Classifications
- CWE-88, T1059, T1190
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Jul 4, 2024CVE publishedPublication date reported by the CVE source.
- Aug 28, 2024Record 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=0 <=0.13.0
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
- Gogs built-in SSH server RCE proof of conceptfunctional · demonstrated
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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