CVE-2024-6891 in jtime
Summary
by MITRE • 08/08/2024
Attackers with a valid username and password can exploit a python code injection vulnerability during the natural login flow.
If you want to get the best quality for vulnerability data then you always have to consider VulDB.
Analysis
by VulDB Data Team • 08/08/2024
The vulnerability identified as CVE-2024-6891 represents a critical code injection flaw within the authentication system of affected software applications. This vulnerability specifically manifests during the standard login process, where authenticated attackers with valid credentials can leverage their access to execute arbitrary python code on the target system. The flaw exists in the natural login flow, suggesting that the vulnerability is not limited to specific authentication methods but rather affects the core authentication mechanism itself. This presents a significant risk as attackers can exploit legitimate user sessions to gain unauthorized code execution capabilities, potentially escalating their privileges and compromising the entire system infrastructure. The vulnerability's exploitation requires only valid authentication credentials, making it particularly dangerous as it can be leveraged by both internal and external threat actors who have obtained legitimate user access.
The technical root cause of this vulnerability aligns with CWE-94, which describes the weakness of executing arbitrary code or commands, and specifically relates to improper input validation within the authentication flow. The flaw likely occurs when user-supplied input from the login process is not properly sanitized or validated before being processed by the python interpreter. During the natural login flow, the system may be directly incorporating user-provided data into python execution contexts without adequate sanitization measures. This could manifest through improper handling of session tokens, authentication parameters, or other user-controllable inputs that are subsequently processed by python code. The vulnerability's presence in the standard authentication flow suggests that the software may be using dynamic code evaluation functions such as eval() or exec() with unsanitized user input, creating an avenue for attackers to inject malicious python commands that will execute with the privileges of the authenticated user.
The operational impact of CVE-2024-6891 extends far beyond simple privilege escalation, as successful exploitation can lead to complete system compromise and data exfiltration. Attackers can leverage this vulnerability to execute arbitrary commands on the target system, potentially gaining access to sensitive data, modifying system configurations, or establishing persistent backdoors. The vulnerability's exploitation during the natural login flow means that detection becomes particularly challenging since the malicious activity occurs within what appears to be legitimate user behavior. This characteristic aligns with ATT&CK technique T1078 which covers legitimate credentials usage, making the attack harder to detect through traditional security monitoring. The impact is further amplified by the fact that attackers only need valid authentication credentials, which are often easier to obtain through various means such as credential stuffing, phishing attacks, or insider threats. Organizations may experience unauthorized access to critical systems, data breaches, and potential compliance violations, especially in environments where the authentication system controls access to sensitive resources.
Mitigation strategies for CVE-2024-6891 should focus on implementing robust input validation and sanitization mechanisms within the authentication flow. Organizations must ensure that all user-supplied data is properly validated and sanitized before being processed by any code execution functions. This includes avoiding the use of dynamic code evaluation methods such as eval() or exec() with user-controllable input, and instead implementing safer alternatives such as static code analysis or restricted execution environments. The implementation of principle of least privilege should be enforced, ensuring that authenticated users have only the minimum necessary permissions to perform their legitimate tasks. Additionally, organizations should deploy comprehensive monitoring solutions that can detect anomalous behavior patterns during login processes, including unexpected code execution or unusual command sequences. Regular security audits and penetration testing should be conducted to identify similar vulnerabilities within the authentication system, while also implementing multi-factor authentication to add additional layers of security. The remediation process should include thorough code reviews focusing on authentication flows, implementation of web application firewalls to filter malicious input, and ensuring that all authentication components are regularly updated and patched to prevent exploitation of similar vulnerabilities in the future.