CVE-2018-4262 in Safari
Summary
by MITRE
In Safari before 11.1.2, iTunes before 12.8 for Windows, iOS before 11.4.1, tvOS before 11.4.1, iCloud for Windows before 7.6, multiple memory corruption issues were addressed with improved memory handling.
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Analysis
by VulDB Data Team • 04/05/2023
This vulnerability represents a series of memory corruption issues affecting Apple's ecosystem across multiple platforms and applications. The affected software includes Safari web browser versions prior to 11.1.2, iTunes versions before 12.8 for Windows, iOS versions before 11.4.1, tvOS versions before 11.4.1, and iCloud for Windows versions before 7.6. These memory corruption flaws stem from inadequate memory handling mechanisms that could potentially allow attackers to execute arbitrary code or cause application crashes. The vulnerability category aligns with CWE-122, which describes heap-based buffer overflows, and CWE-787, which covers out-of-bounds writes in heap-based buffers. Memory corruption vulnerabilities in web browsers and media applications present particularly dangerous attack surfaces since they can be exploited through malicious web content or media files. The affected applications process multimedia content, handle web requests, and manage user data in ways that create opportunities for attackers to manipulate memory structures. These issues are particularly concerning in the context of the ATT&CK framework where they would be classified under techniques such as T1059 for command and script interpreter usage, and T1203 for exploitation for client execution. The vulnerabilities could enable attackers to execute malicious code with the privileges of the affected application, potentially leading to full system compromise. The memory corruption issues typically arise from improper bounds checking, use-after-free conditions, or double-free errors that occur during memory allocation and deallocation processes. Attackers could exploit these flaws by crafting malicious web pages or media files that trigger the vulnerable code paths when processed by the affected applications. The remediation approach involves implementing proper memory management practices including bounds checking, null pointer validation, and secure memory allocation techniques. Apple's patching strategy addressed these issues through improved memory handling mechanisms that prevent unauthorized memory access patterns. Organizations should prioritize updating all affected applications to their latest versions to mitigate potential exploitation risks. The vulnerability demonstrates the importance of secure coding practices in preventing memory-related exploits, particularly in applications that process untrusted data from web sources or user inputs. System administrators should monitor for these specific version numbers and ensure that all endpoints running affected software are updated promptly. The impact extends beyond individual user devices to enterprise environments where these applications may be used to access corporate resources, making the vulnerability particularly significant for organizations with comprehensive Apple ecosystem deployments. Security teams should implement monitoring for exploitation attempts targeting these specific vulnerabilities and maintain updated threat intelligence feeds to identify potential attacks. The remediation process requires careful testing to ensure that updates do not introduce compatibility issues with existing applications or workflows. Organizations should also consider implementing additional security controls such as web application firewalls, content filtering, and network segmentation to provide defense-in-depth against potential exploitation attempts.