CVE-2015-5798 in iTunes
Summary
by MITRE
WebKit, as used in Apple iTunes before 12.3, 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 WebKit CVEs listed in APPLE-SA-2015-09-16-3.
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Analysis
by VulDB Data Team • 06/18/2022
The vulnerability identified as CVE-2015-5798 represents a critical security flaw within WebKit engine components utilized in Apple iTunes versions prior to 12.3. This vulnerability specifically targets the iTunes Store browsing functionality, creating a significant attack surface that could be exploited by malicious actors positioned in man-in-the-middle scenarios. The flaw demonstrates the complex nature of web browser engine security where vulnerabilities in core rendering components can lead to severe consequences including arbitrary code execution and system instability. The vulnerability is classified as a memory corruption issue that manifests during the processing of iTunes Store content, distinguishing it from other WebKit vulnerabilities referenced in APPLE-SA-2015-09-16-3.
The technical implementation of this vulnerability stems from improper handling of data structures within WebKit's rendering engine when processing content from the iTunes Store. Attackers can leverage this weakness by intercepting network traffic between iTunes and Apple's servers, potentially manipulating the data flow to trigger memory corruption conditions. The flaw likely involves improper memory management during the parsing or rendering of web content, specifically when handling dynamic content from iTunes Store web pages. This type of vulnerability 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 common in memory corruption vulnerabilities. The attack vector requires network-level interception capabilities, making it particularly dangerous in unsecured network environments.
The operational impact of CVE-2015-5798 extends beyond simple denial of service conditions to encompass potential arbitrary code execution capabilities that could allow attackers to gain full control over affected systems. When the memory corruption occurs during iTunes Store browsing operations, users may experience application crashes or complete system instability, but more critically, the vulnerability could be exploited to inject malicious code that executes with the privileges of the iTunes application. This represents a significant escalation from typical denial of service attacks and aligns with ATT&CK technique T1059, which covers command and scripting interpreter usage. The vulnerability affects not just individual user systems but could potentially be leveraged for broader attacks against Apple's ecosystem, given iTunes' widespread use across iOS and macOS platforms.
Mitigation strategies for this vulnerability primarily focus on immediate software updates to iTunes version 12.3 or later, which contain the necessary patches to address the WebKit memory corruption issues. Users should also implement network security measures including encrypted connections, proper firewall configurations, and network monitoring to detect potential man-in-the-middle attacks. Organizations should consider implementing network segmentation and secure browsing policies to reduce exposure to such attacks. The vulnerability demonstrates the importance of maintaining current software versions and highlights the risks associated with using outdated applications that may contain unpatched security flaws. Security teams should also monitor for similar patterns in other WebKit-based applications and ensure comprehensive patch management procedures are in place to address vulnerabilities promptly. The fix implemented by Apple in iTunes 12.3 likely involved memory boundary checks and proper validation of data structures during iTunes Store content rendering operations, addressing the root causes of the memory corruption conditions that enabled the exploitation.