CVE-2015-0989 in PACTware
Summary
by MITRE
PACTware 4.1 SP3 allows remote attackers to cause a denial of service (application crash) via a crafted file that triggers an internal error.
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Analysis
by VulDB Data Team • 12/01/2024
The vulnerability identified as CVE-2015-0989 affects PACTware 4.1 Service Pack 3, a software application used for industrial automation and control systems. This flaw represents a denial of service condition that can be triggered remotely by attackers who submit specially crafted files to the application. The vulnerability stems from inadequate input validation and error handling mechanisms within the software's file processing routines. When the application encounters these malformed files, it fails to properly handle the internal error conditions, resulting in application crashes and complete service disruption. The impact extends beyond simple availability issues as this vulnerability can be exploited without authentication, making it particularly dangerous in operational technology environments where continuous system uptime is critical. The vulnerability demonstrates poor defensive programming practices and highlights the importance of robust error handling in industrial control systems where reliability is paramount.
The technical implementation of this vulnerability involves the application's failure to properly validate file formats and content before processing them through internal parsing mechanisms. When a maliciously crafted file is submitted, the parsing engine encounters unexpected data structures or malformed content that triggers an unhandled exception within the application's internal error handling system. This leads to a crash of the main application process, effectively rendering the service unavailable to legitimate users. The flaw falls under the category of improper error handling as defined by CWE-754, which specifically addresses situations where applications fail to properly manage error conditions that could lead to system instability or crashes. The vulnerability's remote exploitability means that attackers can trigger the denial of service condition from outside the local network, potentially affecting industrial control systems that may have limited network segmentation or security controls.
From an operational perspective, this vulnerability presents significant risks to industrial environments where PACTware is deployed for process control and monitoring. The remote denial of service capability can be exploited to disrupt critical automation processes, potentially leading to production downtime, safety system failures, or operational inefficiencies. The vulnerability's impact is particularly concerning in environments where the application serves as a central component of control system architecture, as it could be leveraged to create cascading failures throughout connected systems. The lack of authentication requirements for exploitation means that any attacker with network access can potentially trigger the vulnerability, making it accessible to both malicious actors and potentially automated attack tools. This characteristic aligns with ATT&CK technique T1499.001 which covers network denial of service attacks, and demonstrates how industrial control systems can be targeted through application-level vulnerabilities.
Mitigation strategies for this vulnerability should focus on immediate patching and implementation of network segmentation controls. Organizations should prioritize applying the vendor-provided security update that addresses the file processing error handling issue in PACTware 4.1 SP3. Until patches are applied, network access to affected systems should be restricted through firewalls and access controls to limit potential exploitation. Implementing monitoring solutions that can detect unusual application crash patterns or file submission activities can help identify exploitation attempts. Additionally, organizations should consider implementing redundant systems or backup controls to maintain operational capability during potential exploitation events. The vulnerability highlights the importance of secure coding practices including proper input validation, robust error handling, and comprehensive testing of file processing capabilities in industrial control applications. Regular vulnerability assessments and security audits of operational technology systems are essential to identify similar weaknesses that could lead to system disruption or compromise.