CVE-2011-2338 in Safari
Summary
by MITRE
WebKit, as used in Apple iTunes before 10.5, allows man-in-the-middle attackers to execute arbitrary code or cause a denial of service (memory corruption and application crash) via vectors related to iTunes Store browsing, a different vulnerability than other CVEs listed in APPLE-SA-2011-10-11-1.
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Analysis
by VulDB Data Team • 01/19/2025
The vulnerability described in CVE-2011-2338 represents a critical security flaw within Apple iTunes version 10.4 and earlier, specifically affecting the WebKit rendering engine component that handles iTunes Store browsing functionality. This issue stems from improper handling of network communications and memory management during web content processing, creating a significant attack surface for malicious actors. The vulnerability manifests when iTunes processes content from the iTunes Store, particularly during browsing operations, where the application fails to properly validate or sanitize incoming data streams. This flaw enables attackers positioned in a man-in-the-middle position to exploit the application's memory handling mechanisms, potentially leading to arbitrary code execution or system crashes. The vulnerability operates through a complex interaction between network protocol handling and memory allocation routines within the WebKit engine, making it particularly dangerous as it can be triggered through legitimate browsing activities.
The technical implementation of this vulnerability involves memory corruption issues that occur when iTunes processes certain web content received from the iTunes Store servers. The flaw typically manifests as heap-based buffer overflows or use-after-free conditions within the WebKit rendering engine's JavaScript execution environment. Attackers can craft malicious content that, when loaded through iTunes Store browsing, causes the application to allocate memory incorrectly or access freed memory regions. This memory corruption directly leads to application instability and potential code execution privileges. The vulnerability is classified under CWE-122 Heap-based Buffer Overflow and CWE-476 NULL Pointer Dereference, both of which are common indicators of memory corruption vulnerabilities in web browsers and application frameworks. The attack vector specifically targets the network communication stack within iTunes, making it particularly effective against users who regularly browse the iTunes Store or download content through the application.
From an operational perspective, this vulnerability presents significant risks to both individual users and enterprise environments that rely on iTunes for media management and software distribution. The man-in-the-middle attack requirement means that adversaries need to position themselves between the user and iTunes Store servers, typically through compromised networks, public Wi-Fi access points, or DNS hijacking techniques. Once exploited, the vulnerability can result in complete system compromise, as arbitrary code execution allows attackers to install malware, steal user credentials, or modify system files. The denial of service aspect of this vulnerability can also be leveraged for persistent disruption of iTunes functionality, affecting users' ability to access their media libraries or download new content. This vulnerability aligns with several ATT&CK techniques including T1059 Command and Scripting Interpreter for code execution, T1566 Phishing for credential theft, and T1071 Application Layer Protocol for network communication manipulation. The impact extends beyond simple application crashes to encompass potential data breaches and system compromise scenarios.
Mitigation strategies for CVE-2011-2338 primarily focus on immediate software updates and network security improvements. Apple addressed this vulnerability through iTunes version 10.5, which included patches to the WebKit engine's memory handling routines and enhanced input validation for network content. Organizations should implement mandatory update policies ensuring all iTunes installations are current with security patches. Network security measures including SSL inspection, DNS security protocols, and monitoring for suspicious traffic patterns can help detect potential exploitation attempts. Users should avoid using iTunes Store browsing on untrusted networks and consider implementing network segmentation to limit exposure. The vulnerability highlights the importance of secure coding practices in web rendering engines and demonstrates how seemingly minor memory handling flaws can create significant security risks. Security professionals should monitor for similar vulnerabilities in other applications using WebKit or similar rendering engines, as the underlying architectural issues often affect multiple products within the same ecosystem. Regular vulnerability assessments and penetration testing focusing on network communication components can help identify and remediate similar issues before they can be exploited in the wild.