CVE-2023-47105 Scanner

Chaosblade is a powerful tool used for chaos engineering, allowing developers and IT operations teams to inject faults into their systems to test resilience and reliability. Administrators deploy Chaosblade within their IT infrastructure to simulate failures and even test recovery mechanisms. The tool is extensively utilized in environments aiming to perform stress tests and identify potential weaknesses. Businesses primarily involved in software development and IT service management find Chaosblade valuable for maintaining system stability. Open-source in nature, Chaosblade keeps evolving with various community-contributed features to enhance system reliability. Its server mode allows for remote distributed testing across various nodes, making it suitable for complex application environments.

Remote Code Execution (RCE) vulnerabilities allow attackers to execute arbitrary code on a remote system without physical access. This type of vulnerability often results from inadequate validation of user input, leading to the execution of unexpected commands. The Chaosblade vulnerability particularly arises from the `cmd` parameter in the server mode, which wasn't sufficiently restricted from running unauthorized scripts. As RCEs provide a wide range of attack possibilities, they pose significant threats to system integrity and data confidentiality. As seen in CVE-2023-47105, attackers can leverage this vulnerability to compromise the system's security model. Recommendations include enforcing strict validation checks and securing communication channels used within vulnerable software.

The vulnerability in Chaosblade stems from the `exec.CommandContext` function in versions before 1.7.4. When deployed in server mode, the Chaosblade allows OS command execution through the 'cmd' parameter without requiring authentication. Attackers can target this endpoint by submitting malicious GET requests containing payloads via the cmd parameter. Success in such an attack provides means for unauthorized access and command execution, potentially rendering the host compromised. The markers verify attack execution by checking command output such as 'uid=' in the HTTP response. Keeping this endpoint unprotected poses a severe risk of having the system manipulated by unauthorized persons.

If left unaddressed, the RCE vulnerability in Chaosblade can lead to significant security impacts. Malicious actors might gain unauthorized root-level control of the host system, exploiting these privileges for lateral movements within the network. Data breaches, system downtimes, or unauthorized data manipulations are plausible if an attacker manages this control at scale. There is also the potential for cryptomining malware installations or other persistent threats that could degrade system performance. Consequently, this vulnerability could tarnish user trust and require substantial effort and resources to mitigate the harm post-breach. Immediate patching efforts and regular security audits are recommended to prevent exploits from appearing.

REFERENCES

• https://nvd.nist.gov/vuln/detail/CVE-2023-47105
• https://github.com/advisories/GHSA-723h-x37g-f8qm
• https://github.com/chaosblade-io/chaosblade/blob/0a07380c9899febb2b544132783b376b44226cca/exec/os/executor.go#L68
• https://narrow-oatmeal-0c0.notion.site/ChaosBlade-Remote-Command-Execution-CVE-2023-47105-4f5459046488436caaec2bced6ff26d7