CVE-2023-52332 in Allegra
Summary
by MITRE • 11/22/2024
Allegra serveMathJaxLibraries Directory Traversal Information Disclosure Vulnerability. This vulnerability allows remote attackers to disclose sensitive information on affected installations of Allegra. Authentication is not required to exploit this vulnerability.
The specific flaw exists within the serveMathJaxLibraries method. The issue results from the lack of proper validation of a user-supplied path prior to using it in file operations. An attacker can leverage this vulnerability to disclose stored credentials, leading to further compromise. Was ZDI-CAN-22532.
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Analysis
by VulDB Data Team • 01/03/2025
The CVE-2023-52332 vulnerability represents a critical directory traversal flaw in Allegra's serveMathJaxLibraries functionality that exposes sensitive information disclosure capabilities to remote attackers without authentication requirements. This vulnerability resides within the application's file handling mechanism where user-supplied paths are processed without adequate validation, creating a pathway for unauthorized access to system resources. The flaw specifically manifests in the method responsible for serving MathJax libraries, which are commonly used for mathematical notation rendering in web applications. The absence of proper input sanitization allows attackers to manipulate file path parameters and access files outside the intended directory structure, potentially compromising system integrity and confidentiality.
This vulnerability directly maps to CWE-22 Directory Traversal, a well-documented weakness in software security that occurs when applications fail to properly validate user input before using it in file operations. The attack vector leverages the fundamental principle that unvalidated file paths can be manipulated to traverse directory structures beyond intended boundaries. The vulnerability's severity is amplified by its remote exploitability and lack of authentication requirements, making it particularly dangerous as it can be exploited from any network location without prior access credentials. The flaw essentially allows an attacker to bypass normal access controls and retrieve files that should remain protected, including potentially sensitive configuration files, credential stores, or other system resources.
The operational impact of this vulnerability extends beyond simple information disclosure, as the exposure of stored credentials creates opportunities for further compromise within the affected system. Attackers can leverage the disclosed information to escalate privileges, gain deeper system access, or conduct additional attacks against other components within the network. The vulnerability's presence in a MathJax library serving component is particularly concerning because such libraries are often integral to web applications and may contain references to system resources or configuration data that could be accessed through the traversal mechanism. This type of vulnerability can enable attackers to move laterally within a network, potentially accessing databases, application files, or other sensitive resources that were not intended to be exposed through the vulnerable API endpoint.
Security mitigations for this vulnerability should focus on implementing strict input validation and path sanitization measures within the serveMathJaxLibraries method. The solution requires enforcing proper parameter validation that rejects any input containing directory traversal sequences such as ../ or ..\, while also implementing proper access controls and privilege separation. Organizations should immediately apply patches or workarounds that validate all user-supplied paths against a whitelist of acceptable directories and ensure that file operations are confined to intended directories only. The implementation should follow secure coding practices as outlined in the OWASP Secure Coding Guidelines and the NIST Cybersecurity Framework, particularly focusing on input validation, privilege reduction, and secure file handling. Additionally, network monitoring should be enhanced to detect suspicious file access patterns that may indicate exploitation attempts, and regular security assessments should be conducted to identify similar vulnerabilities in other application components that may be susceptible to similar directory traversal attacks.