CVE-2015-5794 in iTunes
Summary
by MITRE
WebKit, as used in Apple iOS before 9 and iTunes before 12.3, allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption and application crash) via a crafted web site, a different vulnerability than other WebKit CVEs listed in APPLE-SA-2015-09-16-1 and APPLE-SA-2015-09-16-3.
If you want to get best quality of vulnerability data, you may have to visit VulDB.
Analysis
by VulDB Data Team • 06/18/2022
The vulnerability identified as CVE-2015-5794 represents a critical memory corruption flaw within WebKit's JavaScript engine implementation that affected Apple's mobile and desktop operating systems. This vulnerability specifically impacted Apple iOS versions prior to 9.0 and iTunes versions prior to 12.3, creating a significant attack surface for remote threat actors. The flaw resides in how WebKit processes certain JavaScript code constructs, particularly when handling complex object manipulation and memory allocation patterns. Attackers could craft malicious web pages that, when loaded in Safari or iTunes, would trigger memory corruption conditions leading to arbitrary code execution or system crashes. The vulnerability demonstrates the inherent complexity of modern web browsers where JavaScript engines must balance performance optimization with memory safety, creating potential exploitation vectors that have been historically challenging to prevent.
The technical exploitation of this vulnerability leverages memory corruption patterns that occur during JavaScript object lifecycle management and garbage collection processes within WebKit's JavaScript engine. When a malicious website loads content that triggers specific memory allocation sequences, the engine's memory management routines fail to properly validate object references, leading to buffer overflows or use-after-free conditions. This type of vulnerability aligns with CWE-125, which describes out-of-bounds read conditions, and CWE-787, which covers out-of-bounds write conditions. The attack scenario typically involves crafting JavaScript code that creates complex object hierarchies and then manipulates them in ways that cause the JavaScript engine to corrupt memory structures, potentially allowing attackers to overwrite critical memory locations with malicious code. The vulnerability's classification as a remote code execution flaw means that no user interaction beyond visiting a malicious website is required for exploitation, making it particularly dangerous in phishing campaigns or compromised websites.
The operational impact of CVE-2015-5794 extends beyond simple application crashes to encompass full system compromise potential for affected Apple devices. Mobile users running iOS versions prior to 9.0 faced exposure through web browsing activities, while iTunes users were at risk when synchronizing with compromised websites or when the application loaded malicious content during updates or synchronization processes. The vulnerability's presence in both mobile and desktop environments created a unified attack vector that could potentially be leveraged across Apple's ecosystem, with implications for enterprise security and personal data protection. Organizations relying on Apple devices for business operations faced significant risk of data breaches, system compromise, and potential lateral movement within network environments. The vulnerability's similarity to other WebKit CVEs from the same timeframe indicates a pattern of memory safety issues within Apple's browser engine implementation, suggesting that the underlying architectural approach to JavaScript engine memory management required fundamental review and remediation.
Mitigation strategies for this vulnerability required immediate patching of affected Apple systems through official software updates, as the flaw existed in core system components that could not be easily isolated or disabled. Apple's release of iOS 9.0 and iTunes 12.3 contained the necessary patches that addressed the memory corruption conditions through improved input validation and enhanced memory management routines. Security teams should have implemented network-level protections such as web application firewalls and content filtering systems to prevent access to known malicious domains until official patches were deployed. The vulnerability highlighted the importance of maintaining up-to-date software versions and demonstrated how third-party web content could serve as attack vectors even when users were operating within secure network environments. Organizations needed to establish rapid deployment procedures for security patches and implement monitoring systems to detect potential exploitation attempts, as the vulnerability's exploitation could occur without user awareness or explicit interaction with malicious content. This vulnerability reinforced the principle that browser-based attacks represent one of the most persistent and effective attack vectors in cybersecurity, requiring continuous vigilance and proactive security measures.