This vulnerability allows command execution hijacking on Windows systems when an executable file named `cmd.exe` is located in the current working directory. The issue occurs in the Symfony process module of the Symfony PHP framework, which executes commands in sub-processes. Specifically, the `Process` class will call `cmd.exe` when preparing command arguments, leading to potential security risks.
The severity of this vulnerability is currently classified as unknown, and it has a CVSS score of 0. Despite the low score, organizations should understand that any potential for command execution could lead to significant security issues if exploited. It is crucial for organizations that utilize Symfony to assess their risk posture regarding this vulnerability.
Currently, there are no known exploits or proofs of concept for this vulnerability. However, the lack of known exploits does not diminish its importance. Organizations should prioritize patching their systems to versions 5.4.46, 6.4.14, and 7.1.7, which address this vulnerability.
Urgency for defenders is heightened due to the nature of command execution vulnerabilities, which can be exploited in various attack scenarios. Therefore, organizations should address this issue in their priority patch cycle.
Vulnerability Details
The vulnerability in question is related to the Symfony PHP framework's process module, which facilitates the execution of commands in sub-processes. The specific issue arises when `cmd.exe` is present in the current working directory on Windows systems. This leads to the potential hijacking of command executions.
As mentioned, this vulnerability has been addressed in Symfony versions 5.4.46, 6.4.14, and 7.1.7. Users are strongly advised to upgrade to these versions to mitigate the risks associated with this vulnerability. Currently, there are no known workarounds.
Technical Analysis
The root cause of this vulnerability is the way the Symfony `Process` class handles command arguments. When `cmd.exe` is present in the current working directory, it is invoked improperly, allowing for potential command execution hijacking, particularly on Windows systems.
The attack vector is categorized as LOCAL, meaning that an attacker would need local access to the system to exploit this vulnerability. Attack complexity is low, as it does not require advanced skills to execute the attack. Importantly, no user interaction is required to trigger the exploit.
The vulnerability is classified under CWE-77, which pertains to improper neutralization of special elements used in a command ('command injection'). In terms of impact, there are no confidentiality, integrity, or availability impacts reported, which correlates with the current CVSS score of 0.
Risk & Impact Analysis
The real-world risk associated with this vulnerability primarily revolves around the potential for unauthorized command execution in a local context. Organizations utilizing the Symfony framework should assess their deployment environments carefully, especially those operating on Windows where the vulnerability is present.
The potential blast radius for this vulnerability could be significant if an attacker successfully executes commands. The urgency assessment is moderate, with an emphasis on patching due to the nature of command execution vulnerabilities, which can lead to further escalation or unauthorized access if exploited.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The affected product is Sensiolabs Symfony. Specifically, versions prior to 5.4.46, any version from 6.0.0 to 6.4.14, and any version from 7.0.0 to 7.1.7 are vulnerable. If version information is missing, it is recommended to state: 'All versions prior to vendor patch.'
Mitigation & Remediation
Organizations should prioritize patching immediately. Upgrade to Symfony versions 5.4.46, 6.4.14, or 7.1.7. If a patch is not available, consider implementing additional security measures to restrict command execution in the environment.
For further guidance, organizations are encouraged to review their security practices and ensure that they are following best practices for application security. Regular security assessments can provide insights into vulnerabilities within the application environment.
For a comprehensive approach to vulnerability management, organizations may consider penetration testing services to identify similar weaknesses.
Detection Guidance
Organizations should monitor logs for unusual command executions, especially those involving `cmd.exe`. Behavioral anomalies may indicate attempts to leverage this vulnerability, and network signatures should be updated to detect potential exploitation attempts.
AppSecure Threat Intelligence Insight
The long-term significance of this vulnerability lies in its ability to expose organizations to potential command execution risks. It highlights the importance of rigorous input validation and secure coding practices in application development.
This vulnerability represents a trend where improper handling of local command executions can lead to significant security issues. Security teams should take this incident as a lesson to strengthen their application security posture.
For further insights into managing vulnerabilities and enhancing application security, organizations are encouraged to explore vulnerability management best practices and consider implementing a penetration testing methodology to identify vulnerabilities before they can be exploited.
Lastly, organizations should always maintain an updated inventory of software components and monitor for any vulnerabilities that could affect their systems.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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