CVE-2015-1696 in Windows
Summary
by MITRE
Microsoft Windows Vista SP2, Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8, Windows 8.1, Windows Server 2012 Gold and R2, and Windows RT Gold and 8.1 allow remote attackers to execute arbitrary code via a crafted Journal file, aka "Windows Journal Remote Code Execution Vulnerability," a different vulnerability than CVE-2015-1675, CVE-2015-1695, CVE-2015-1697, CVE-2015-1698, and CVE-2015-1699.
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Analysis
by VulDB Data Team • 05/11/2022
The vulnerability identified as CVE-2015-1696 represents a critical remote code execution flaw within Microsoft Windows operating systems that affects multiple versions including Windows Vista SP2, Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8, Windows 8.1, Windows Server 2012 Gold and R2, and Windows RT Gold and 8.1. This vulnerability specifically resides in the Windows Journal component, which is designed to handle journal files for note-taking and document management purposes. The flaw allows remote attackers to execute arbitrary code on affected systems when a specially crafted journal file is opened or processed by the vulnerable software, making it particularly dangerous in environments where users might encounter malicious files through email attachments, web downloads, or network shares.
The technical nature of this vulnerability stems from improper input validation within the Windows Journal application's handling of malformed journal files. When the application processes a crafted journal file, it fails to properly validate the structure and content of the file, leading to memory corruption that can be exploited to execute malicious code with the privileges of the user running the application. This type of vulnerability falls under CWE-121, which describes stack-based buffer overflow conditions, and represents a classic example of how improper validation of untrusted data can lead to arbitrary code execution. The vulnerability is particularly concerning because it operates at the application level and can be triggered through various attack vectors without requiring user interaction beyond opening the malicious file.
The operational impact of CVE-2015-1696 extends beyond simple code execution as it provides attackers with a potential foothold for further compromise within affected networks. Once successfully exploited, the vulnerability allows attackers to install programs, modify system configurations, access or modify sensitive data, and potentially establish persistence mechanisms. The attack surface is significant given that Windows Journal is included in many Windows installations and users may encounter malicious journal files through legitimate business processes such as document sharing or collaboration tools. The vulnerability's classification under the ATT&CK framework would place it within the T1059.007 technique category, which covers command and scripting interpreter for remote code execution, and T1106 technique for execution through Windows management instrumentation, as attackers could leverage the initial compromise for further lateral movement and privilege escalation.
Mitigation strategies for CVE-2015-1696 should focus on immediate patching of affected systems through Microsoft's security updates, which would address the underlying buffer overflow issue in the Windows Journal component. Organizations should also implement network segmentation to limit the potential spread of exploitation attempts and deploy application whitelisting policies to prevent unauthorized applications from executing on systems. Additionally, user education programs should emphasize the importance of not opening suspicious files from untrusted sources, and security administrators should monitor network traffic for potential exploitation attempts. The vulnerability's remediation aligns with Microsoft's security best practices and follows the principle of least privilege, ensuring that users have minimal necessary permissions to reduce the impact of successful exploitation attempts. Regular security assessments and vulnerability scanning should be conducted to identify any remaining unpatched systems within the organization's infrastructure.