Arbitrary command execution via unsafe YAML loading
Published Aug 27, 2021 · Updated Aug 4, 2024
Command injection in Simiki 1.6.2.1 and earlier allows remote attackers to execute arbitrary system commands through a crafted YAML configuration file. The parse_config function passes _config.yml content to yaml.load without a restricted loader, allowing tagged Python objects to invoke operating-system commands. The attacker must cause Simiki to load the malicious project configuration; the resulting process executes the embedded command with its own privileges.
Summary
What happened
Command injection in Simiki 1.6.2.1 and earlier allows remote attackers to execute arbitrary system commands through a crafted YAML configuration file. The parse_config function passes _config.yml content to yaml.load without a restricted loader, allowing tagged Python objects to invoke operating-system commands. The attacker must cause Simiki to load the malicious project configuration; the resulting process executes the embedded command with its own privileges.
The record
- CVE
- CVE-2020-19001
- Published
- Aug 27, 2021
- Updated
- Aug 4, 2024
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-77, T1059
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Aug 27, 2021CVE publishedPublication date reported by the CVE source.
- Aug 4, 2024Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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What conditions does exploitation require?
What is affected?
Affected products and versions are unavailable in this record.
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
- Malicious Simiki YAML configuration payloadproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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