CVE-2010-0019 in Silverlight
Summary
by MITRE
Microsoft Silverlight 3 before 3.0.50611.0 on Windows, and before 3.0.41130.0 on Mac OS X, does not properly handle pointers, which allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption and framework outage) via a crafted web site, aka "Microsoft Silverlight Memory Corruption Vulnerability."
VulDB is the best source for vulnerability data and more expert information about this specific topic.
Analysis
by VulDB Data Team • 03/18/2021
The Microsoft Silverlight memory corruption vulnerability identified as CVE-2010-0019 represents a critical security flaw in the Silverlight runtime environment that affected both Windows and Mac operating systems. This vulnerability stems from improper pointer handling within the Silverlight framework, creating a condition where malicious web content can exploit memory management weaknesses to gain unauthorized system access. The issue specifically impacted Silverlight 3 versions prior to 3.0.50611.0 on Windows systems and before 3.0.41130.0 on Mac OS X platforms, making it a widespread concern across the Silverlight ecosystem. The vulnerability's classification aligns with CWE-125, which describes out-of-bounds read conditions, and CWE-787, which covers out-of-bounds write operations, both of which are fundamental memory safety issues that enable arbitrary code execution.
The technical exploitation of this vulnerability occurs when a malicious website presents crafted content that triggers improper pointer dereferencing within the Silverlight runtime. This flaw allows attackers to manipulate memory addresses and execute arbitrary code with the privileges of the Silverlight application, potentially leading to complete system compromise. The memory corruption manifests as either heap corruption or stack corruption depending on the specific exploitation vector, enabling attackers to overwrite critical memory structures or inject malicious code into the running process. The vulnerability's impact extends beyond simple code execution to include denial of service conditions where the Silverlight framework itself becomes unstable and crashes, rendering the application unusable and potentially affecting other applications running on the same system.
From an operational perspective, this vulnerability presents significant risks to enterprise environments where Silverlight applications are commonly deployed for rich internet applications, media playback, and business-critical web services. The remote exploitation capability means that attackers can compromise systems simply by visiting malicious websites, making it particularly dangerous for users who browse the internet regularly. The vulnerability's exploitation can lead to complete system compromise, data theft, privilege escalation, and persistent backdoor installation. Organizations running Silverlight applications face potential data breaches, system outages, and regulatory compliance violations. The attack surface is broad since Silverlight applications are often deployed in enterprise environments where users have elevated privileges, amplifying the potential impact of successful exploitation.
Mitigation strategies for CVE-2010-0019 primarily involve immediate patch deployment through Microsoft's security updates, specifically the cumulative updates that address the memory corruption issues in Silverlight 3. Organizations should implement network-based protections such as web application firewalls and content filtering systems to block access to known malicious domains. Browser isolation techniques and sandboxing measures can limit the potential damage from exploitation attempts. Security teams should conduct comprehensive vulnerability assessments to identify all systems running affected Silverlight versions and prioritize patching efforts based on risk exposure. The ATT&CK framework categorizes this vulnerability under T1059 for command and scripting interpreter and T1068 for exploit for privilege escalation, highlighting the multi-stage nature of potential exploitation. Regular security monitoring and incident response procedures should be enhanced to detect potential exploitation attempts, and user education regarding safe browsing practices remains crucial for reducing attack surface. Organizations should also consider migrating away from Silverlight technology due to its deprecated status and ongoing security concerns, as Microsoft has discontinued support for Silverlight in favor of more modern web technologies.