CVE-2015-5803 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 • 11/22/2024
CVE-2015-5803 represents a critical memory corruption vulnerability within WebKit engine that affected Apple iOS versions prior to 9.0 and iTunes versions prior to 12.3. This vulnerability resides in the browser rendering engine that powers Safari and other web-based applications on Apple devices, making it a significant threat to mobile and desktop users. The flaw enables remote code execution through maliciously crafted websites, allowing attackers to gain unauthorized access to affected systems. The vulnerability operates by exploiting improper memory handling during web page rendering processes, specifically targeting buffer overflows or use-after-free conditions that can be triggered when parsing certain web content. This type of vulnerability falls under CWE-125, which describes out-of-bounds read conditions, and CWE-787, which covers out-of-bounds write operations. The attack vector is particularly dangerous because it requires no user interaction beyond visiting a compromised website, making it susceptible to drive-by download attacks and phishing campaigns.
The technical exploitation of this vulnerability involves crafting web content that triggers memory corruption during WebKit's parsing of HTML, CSS, or JavaScript elements. Attackers can leverage this flaw to execute arbitrary code with the privileges of the affected application, typically resulting in complete system compromise. The memory corruption manifests as either heap corruption or stack corruption, which can be leveraged to overwrite critical memory locations and redirect program execution flow. This vulnerability has been categorized under the MITRE ATT&CK framework as part of the T1059 technique for command and script interpreter, specifically targeting the Web Shell and Web Application exploitation domains. The impact extends beyond simple application crashes, as successful exploitation can lead to persistent backdoors, data theft, or complete system control. The vulnerability's classification as a remote code execution flaw makes it particularly attractive to threat actors who seek to establish persistent access to target systems without requiring physical presence or user interaction beyond browsing.
The operational impact of CVE-2015-5803 was severe across Apple's ecosystem, affecting millions of iOS devices and desktop users who had not yet updated their iTunes installations. Organizations using Apple products for business operations faced significant risk of data breaches and system compromise, particularly in environments where users accessed untrusted websites or received malicious email attachments. The vulnerability's presence in both iOS and iTunes created a dual attack surface, allowing attackers to target mobile users through web browsing and desktop users through iTunes synchronization processes. Security teams had to urgently implement patch management protocols to ensure all affected systems received updates, as the vulnerability was actively exploited in the wild. The remediation process required coordinated updates across multiple platforms and versions, with Apple releasing security patches through their regular update cycles. Organizations needed to monitor their Apple device inventories carefully and implement automated patching systems to protect against this and similar vulnerabilities.
Mitigation strategies for CVE-2015-5803 focused primarily on immediate patching and system updates, as this vulnerability was considered highly critical by security vendors and organizations. Apple's recommended solution involved updating to iOS 9.0 or later versions and iTunes 12.3 or later, which contained the necessary memory safety improvements and code modifications to prevent the exploitation. Network security teams implemented web filtering solutions and content inspection systems to block access to known malicious domains that leveraged this vulnerability. The implementation of sandboxing measures and privilege separation helped limit the potential damage from successful exploits, although these protections were secondary to the primary patching requirement. Security awareness training became essential for users to recognize potentially malicious websites and avoid visiting compromised domains. Organizations also deployed endpoint detection and response solutions to monitor for signs of exploitation attempts, as the vulnerability could be used in combination with other attack vectors. The incident highlighted the importance of maintaining up-to-date security patches and implementing comprehensive vulnerability management programs that could quickly respond to emerging threats. This vulnerability demonstrated the critical need for continuous security monitoring and rapid response capabilities, as the window between vulnerability disclosure and exploitation was often very short in the mobile security landscape.