CVE-2023-42666 in DEXGate
Summary
by MITRE • 10/25/2023
The affected product is vulnerable to an exposure of sensitive information to an unauthorized actor vulnerability, which may allow an attacker to create malicious requests for obtaining the information of the version about the web server used.
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Analysis
by VulDB Data Team • 10/25/2023
The vulnerability identified as CVE-2023-42666 represents a critical exposure of sensitive information to unauthorized actors within web server implementations. This flaw specifically enables attackers to craft malicious requests that can reveal version information about the underlying web server software, potentially compromising the security posture of affected systems. The vulnerability falls under the category of information disclosure, where sensitive metadata about the server infrastructure becomes accessible through improperly handled requests. Such exposure creates a significant risk as it provides attackers with detailed knowledge about the server software version, which can be leveraged to identify known vulnerabilities and exploit patterns specific to that version. The flaw typically manifests when the web server responds to certain requests with headers, footers, or response content that includes version identifiers, making it easier for threat actors to conduct targeted attacks against known weaknesses in particular software versions.
The technical implementation of this vulnerability stems from inadequate input validation and response handling within the web server's request processing pipeline. When legitimate or malicious requests are processed, the server fails to properly sanitize or restrict the information returned in responses, particularly in cases where version information is inadvertently included in server headers, error messages, or response content. This issue is commonly found in web servers that do not properly implement security headers or that fail to strip version information from responses during processing. The vulnerability can be exploited through various attack vectors including direct request manipulation, proxy server exploitation, or through automated scanning tools that systematically test for version disclosure patterns. According to CWE standards, this represents a weakness in information flow that allows unintended information exposure, specifically categorized under CWE-200 for exposure of sensitive information.
The operational impact of CVE-2023-42666 extends beyond simple information disclosure, as it enables attackers to perform more sophisticated reconnaissance activities. Once version information is obtained, threat actors can cross-reference this data with known vulnerability databases to identify specific exploits, patches, or attack patterns that are applicable to the discovered server version. This intelligence allows for more targeted attacks that can bypass security controls or exploit known weaknesses in the specific software version. The vulnerability also affects the principle of least privilege by providing attackers with detailed information about the server infrastructure, enabling them to craft more precise and effective attacks. In enterprise environments, this exposure can lead to cascading security issues where attackers use the discovered version information to map out the entire technology stack and identify potential attack surfaces within the organization's infrastructure.
Mitigation strategies for this vulnerability focus on implementing proper response sanitization and security hardening measures. Organizations should configure their web servers to remove or obscure version information from all responses through the use of appropriate security headers, such as setting Server header values to generic strings or removing them entirely from HTTP responses. Network security controls should be implemented to filter and monitor for requests that attempt to probe for version information, while also ensuring that all web applications properly validate and sanitize input parameters to prevent unintended information exposure. According to ATT&CK framework, this vulnerability relates to T1592 for reconnaissance and T1068 for exploit public-facing application, making it a critical target for defensive measures. Regular security assessments and penetration testing should be conducted to verify that version information is properly obscured and that no unintended exposure occurs through error responses or debugging information. Additionally, implementing web application firewalls and security monitoring solutions can help detect and block malicious requests designed to extract version information from the server infrastructure.