CVE-2015-5809 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.
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Analysis
by VulDB Data Team • 11/22/2024
The vulnerability identified as CVE-2015-5809 represents a critical memory corruption flaw within WebKit engine components that power Apple's iOS and iTunes applications. This vulnerability specifically affects versions of iOS prior to version 9 and iTunes prior to version 12.3, creating a significant attack surface for remote adversaries who can exploit this weakness through maliciously crafted web content. The flaw operates at the core rendering engine level, where WebKit processes web content for display, making it particularly dangerous as it can be triggered simply by visiting a compromised website without any additional user interaction required.
The technical nature of this vulnerability involves memory corruption that occurs during the processing of malformed web content, leading to unpredictable behavior that can be leveraged for remote code execution. This type of vulnerability falls under the CWE-125 weakness category, which describes out-of-bounds read conditions that can result in memory corruption and potentially arbitrary code execution. The flaw demonstrates characteristics of heap-based buffer overflows or use-after-free conditions that are commonly exploited in browser-based attacks, where attackers craft specific web pages designed to trigger the memory corruption in WebKit's JavaScript engine or rendering components.
The operational impact of CVE-2015-5809 extends beyond simple application crashes, as it provides attackers with the capability to execute arbitrary code on affected systems. This remote code execution vulnerability allows adversaries to gain full control over the affected device, potentially enabling data theft, persistent backdoor installation, or further network reconnaissance activities. The vulnerability's exploitation does not require user interaction beyond visiting a malicious website, making it particularly dangerous for widespread deployment. Attackers can leverage this vulnerability to compromise iOS devices in the wild, potentially affecting millions of users who have not yet updated their systems.
Security researchers have classified this vulnerability as part of a broader class of WebKit exploits that target the rendering engine's memory management functions. The vulnerability's relationship to other WebKit CVEs mentioned in APPLE-SA-2015-09-16-1 and APPLE-SA-2015-09-16-3 demonstrates the ongoing challenges in securing complex browser engines where multiple vulnerabilities can exist simultaneously. Organizations and individuals affected by this vulnerability should immediately implement mitigations including updating to patched versions of iOS and iTunes, implementing network-based protections such as web content filtering, and deploying endpoint protection solutions that can detect and block exploitation attempts. The vulnerability also highlights the importance of regular security updates and the need for organizations to maintain comprehensive patch management programs to protect against similar future exploits.
The ATT&CK framework categorizes this vulnerability under the T1059.007 technique for Command and Scripting Interpreter: JavaScript, as attackers can leverage JavaScript execution capabilities to exploit the memory corruption. Additionally, this vulnerability maps to T1203 for Exploitation for Client Execution, where the exploitation targets client-side applications to gain execution privileges. The security community has documented similar patterns in WebKit exploitation, where memory corruption vulnerabilities are frequently used as initial access vectors for more sophisticated attacks, making CVE-2015-5809 a critical component in understanding browser-based attack methodologies and the importance of maintaining up-to-date security patches across all client applications.