CVE-2011-3458 in Mac OS X
Summary
by MITRE
QuickTime in Apple Mac OS X before 10.7.3 does not prevent access to uninitialized memory locations, which allows remote attackers to execute arbitrary code or cause a denial of service (application crash) via a crafted MP4 file.
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Analysis
by VulDB Data Team • 11/29/2021
The vulnerability identified as CVE-2011-3458 represents a critical memory safety issue within Apple's QuickTime media player implementation on Mac OS X systems. This flaw exists in versions prior to 10.7.3 and stems from improper memory management practices that fail to adequately initialize memory locations before allowing access. The vulnerability specifically affects the MP4 file parsing functionality within QuickTime, creating a pathway for malicious actors to exploit the system through carefully crafted media files.
The technical exploitation of this vulnerability occurs through uninitialized memory access patterns that can be triggered when QuickTime processes malformed MP4 files. When the media player encounters such files, it attempts to access memory locations that have not been properly initialized, leading to unpredictable behavior. This memory access violation creates opportunities for remote code execution attacks where attackers can inject and execute arbitrary code within the context of the QuickTime process. The vulnerability manifests as a potential application crash or complete system compromise depending on the specific exploitation technique employed.
From an operational perspective, this vulnerability presents significant risks to Mac OS X users who may encounter malicious MP4 files through various attack vectors including email attachments, web downloads, or compromised websites. The remote attack capability means that adversaries can exploit this vulnerability without requiring physical access to the target system. The impact extends beyond simple application crashes to potentially full system compromise, making this a critical security concern for enterprise environments where Mac systems are prevalent. Organizations running affected versions of Mac OS X face increased risk of data breaches and system infiltration through this memory corruption flaw.
The vulnerability aligns with CWE-457, which describes "Use of Uninitialized Variable" in software security contexts, and represents a classic example of memory safety issues that have been extensively documented in the security community. According to ATT&CK framework, this vulnerability maps to T1059.007 for command and scripting interpreter and potentially T1203 for Exploitation for Client Execution, as attackers can leverage this flaw to execute malicious code remotely. The exploitation technique relies on the attacker's ability to craft MP4 files that trigger the uninitialized memory access condition, making it a sophisticated attack vector that requires careful file manipulation and understanding of the QuickTime parser internals.
Mitigation strategies for CVE-2011-3458 primarily focus on immediate system updates to Mac OS X 10.7.3 or later versions where Apple has implemented proper memory initialization procedures. System administrators should prioritize patch deployment across all affected Mac systems and consider implementing network-based restrictions on MP4 file downloads until patches are applied. Additional protective measures include configuring sandboxing policies for QuickTime, monitoring for suspicious file access patterns, and implementing network segmentation to limit exposure. Organizations should also consider disabling QuickTime playback for untrusted content and establishing incident response procedures to handle potential exploitation attempts. The vulnerability serves as a reminder of the critical importance of memory safety in media processing libraries and the necessity of thorough security testing for multimedia applications.