CVE-2019-7292 in iCloud
Summary
by MITRE
A validation issue was addressed with improved logic. This issue is fixed in iOS 12.2, tvOS 12.2, watchOS 5.2, Safari 12.1, iTunes 12.9.4 for Windows, iCloud for Windows 7.11. Processing maliciously crafted web content may result in the disclosure of process memory.
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Analysis
by VulDB Data Team • 08/08/2023
The vulnerability identified as CVE-2019-7292 represents a memory disclosure issue affecting multiple Apple operating systems and applications. This security flaw stems from inadequate input validation mechanisms within Apple's web processing frameworks, specifically impacting how maliciously crafted web content is handled. The vulnerability exists in the validation logic that governs how web resources are processed and interpreted by Apple's browsers and web viewing components. The issue was addressed through enhanced validation procedures that prevent improper handling of malformed web content, thereby eliminating the risk of unauthorized memory access.
The technical nature of this vulnerability aligns with CWE-20, which describes improper input validation as a fundamental security weakness. When users encounter malicious web content, the flawed validation logic allows attackers to manipulate the processing flow in a way that exposes sensitive memory segments. This type of vulnerability falls under the broader category of information disclosure flaws that can potentially reveal confidential data stored in process memory. The memory disclosure occurs during the parsing and rendering of web content, where the system's validation mechanisms fail to properly sanitize input parameters.
From an operational perspective, this vulnerability poses significant risks to users who regularly browse the web, particularly in environments where sensitive information might be present in browser processes. The impact extends across multiple platforms including iOS, tvOS, watchOS, Safari, iTunes, and iCloud applications, creating a widespread attack surface. Attackers could potentially exploit this flaw to extract sensitive information such as session tokens, personal data, or other confidential process memory contents. The vulnerability demonstrates how seemingly minor validation issues can create substantial security risks when processing untrusted web content.
The remediation for CVE-2019-7292 involved implementing improved validation logic that properly sanitizes and validates all incoming web content before processing. This fix aligns with defensive programming practices recommended in the OWASP Top Ten and follows the principle of least privilege in input handling. Apple's patch addresses the issue by strengthening the validation checks that occur during web content parsing, ensuring that malformed or malicious content cannot trigger memory disclosure behaviors. Organizations should prioritize updating all affected systems to the patched versions including iOS 12.2, tvOS 12.2, watchOS 5.2, Safari 12.1, iTunes 12.9.4 for Windows, and iCloud for Windows 7.11. The resolution demonstrates the importance of continuous security validation and proper input sanitization in preventing memory exposure attacks that could be leveraged by adversaries in the context of the MITRE ATT&CK framework's credential access and defense evasion techniques.