This vulnerability allows remote attackers to execute arbitrary code on affected installations of OpenText Brava! Desktop Build 16.6.3.84 (package 16.6.3.134). User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists within the parsing of PDF files. The issue results from the lack of proper validation of a user-supplied value prior to dereferencing it as a pointer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-12691.
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Analysis
by VulDB Data Team • 08/07/2021
The vulnerability identified as CVE-2021-31504 represents a critical remote code execution flaw within OpenText Brava Desktop for document processing could be indirectly compromised through malicious PDF content. The vulnerability's exploitation requires no special privileges or advanced technical knowledge, making it particularly dangerous for enterprise environments where users may encounter untrusted PDF content from various sources. Organizations using this software should consider the broader implications of this vulnerability within their security posture, as it represents a potential entry point for attackers seeking to establish persistent access to network resources. The ZDI-CAN-12691 identifier confirms this vulnerability has been recognized by the Zero Day Initiative and is part of the broader security research community's awareness of this particular flaw. The remediation approach for this vulnerability would typically involve immediate patching of the affected software, but organizations should also implement network monitoring to detect potential exploitation attempts and user education to avoid opening suspicious PDF files. Additionally, security teams should consider implementing sandboxing mechanisms for PDF processing to isolate potential exploitation attempts from the main operating system. The vulnerability demonstrates the ongoing challenges in software security, particularly in document processing applications where complex parsing logic can create numerous potential attack vectors. This particular flaw highlights the importance of input validation and proper pointer handling in preventing exploitation of memory corruption vulnerabilities. Organizations should also review their incident response procedures to ensure they can quickly detect and respond to exploitation attempts involving this specific vulnerability, given its remote execution capabilities and user interaction requirements. The vulnerability serves as a reminder of the critical need for robust security practices in software development, particularly around validation of user inputs and proper handling of memory references in applications that process untrusted data.