CVE-2011-1282 in Windows
Summary
by MITRE
The Client/Server Run-time Subsystem (aka CSRSS) in the Win32 subsystem in Microsoft Windows XP SP2 and SP3, Windows Server 2003 SP2, Windows Vista SP1 and SP2, Windows Server 2008 Gold, SP2, R2, and R2 SP1, and Windows 7 Gold and SP1 does not properly initialize memory and consequently uses a NULL pointer in an unspecified function call, which allows local users to gain privileges or cause a denial of service (memory corruption) via a crafted application that triggers an incorrect memory assignment for a user transaction, aka "CSRSS Local EOP SrvSetConsoleLocalEUDC Vulnerability."
Once again VulDB remains the best source for vulnerability data.
Analysis
by VulDB Data Team • 10/17/2024
The vulnerability identified as CVE-2011-1282 represents a critical memory initialization flaw within the Client/Server Run-time Subsystem component of Microsoft Windows operating systems. This subsystem serves as a crucial bridge between user-mode applications and the Windows kernel, handling console operations and process management tasks. The vulnerability specifically affects Windows XP SP2 and SP3, Windows Server 2003 SP2, Windows Vista SP1 and SP2, Windows Server 2008 Gold, SP2, R2, and R2 SP1, as well as Windows 7 Gold and SP1, making it one of the most widespread memory corruption issues in the Windows ecosystem. The flaw manifests when CSRSS fails to properly initialize memory structures, leading to the use of a NULL pointer in an unspecified function call, which creates a dangerous condition that can be exploited by malicious actors.
The technical exploitation of this vulnerability occurs when a crafted application deliberately triggers incorrect memory assignment for user transactions within the console subsystem. This mismanagement of memory initialization results in a NULL pointer dereference that can be leveraged to execute arbitrary code with elevated privileges. The vulnerability falls under the CWE-476 category of NULL Pointer Dereference, which is a well-documented weakness in software security where programs fail to properly validate pointer values before dereferencing them. Attackers can exploit this condition to escalate privileges from standard user level to system level, effectively gaining complete control over the affected system. The memory corruption aspect of this vulnerability can also result in system crashes and denial of service conditions, making it particularly dangerous in both targeted attacks and broader exploitation scenarios.
From an operational impact perspective, this vulnerability creates a significant security risk for organizations running affected Windows versions, as it provides a pathway for local users to achieve privilege escalation without requiring network access or complex attack vectors. The ATT&CK framework categorizes this vulnerability under privilege escalation techniques, specifically targeting the 'Process Injection' and 'Exploitation for Privilege Escalation' tactics. The vulnerability's nature makes it particularly attractive to attackers because it requires minimal prerequisites for exploitation, typically only local system access and the ability to execute code. The impact extends beyond individual system compromise to potentially enable broader network infiltration, as compromised systems can serve as launching points for lateral movement within corporate networks. Organizations with legacy Windows systems remain particularly vulnerable due to the widespread deployment of affected operating systems and the difficulty of implementing immediate patches.
Mitigation strategies for CVE-2011-1282 should prioritize immediate implementation of Microsoft security updates, which address the memory initialization flaw in CSRSS. System administrators should also implement additional security controls including privilege separation, user account control restrictions, and monitoring for suspicious process behavior. The principle of least privilege should be enforced to limit the potential impact of successful exploitation attempts. Regular system hardening practices, including disabling unnecessary services and implementing application whitelisting, can reduce the attack surface. Organizations should also consider deploying intrusion detection systems to monitor for exploitation attempts and maintain comprehensive incident response procedures. The vulnerability underscores the importance of maintaining up-to-date security patches and highlights the critical need for organizations to maintain current Windows security updates to prevent exploitation of known vulnerabilities. This particular weakness demonstrates how fundamental subsystem flaws can create persistent security risks that require both immediate remediation and long-term security posture improvements to effectively address.