CVE-2018-4357 in Xcode
Summary
by MITRE
A memory corruption issue was addressed with improved input validation. This issue affected versions prior to Xcode 10.
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Analysis
by VulDB Data Team • 08/22/2023
The vulnerability identified as CVE-2018-4357 represents a memory corruption flaw that existed within Apple's Xcode development environment prior to version 10. This issue stems from inadequate input validation mechanisms that allowed maliciously crafted data to potentially corrupt memory structures during the compilation process. The vulnerability specifically impacts developers who relied on older versions of Xcode for iOS and macOS application development, creating a significant security risk in the software supply chain. Memory corruption vulnerabilities of this nature are particularly dangerous because they can lead to arbitrary code execution or system instability when exploited by attackers.
The technical root cause of CVE-2018-4357 lies in insufficient validation of input parameters within Xcode's compilation and build processes. When developers used affected versions of Xcode to compile applications, the toolchain would process certain input data without proper sanitization checks, potentially leading to buffer overflows or other memory corruption conditions. This flaw falls under the CWE-129 category of "Improper Validation of Array Index" and aligns with CWE-787 "Out-of-bounds Write" as described in the Common Weakness Enumeration catalog. The vulnerability demonstrates how development tools themselves can become attack vectors when they fail to properly validate inputs from source code or configuration files.
The operational impact of this vulnerability extends beyond individual development environments to potentially compromise the entire software development lifecycle. Developers working with affected Xcode versions could unknowingly introduce memory corruption vulnerabilities into their applications, creating downstream security risks for end users. Attackers could exploit this weakness by crafting malicious source code or build configurations that trigger the memory corruption during compilation, potentially leading to privilege escalation or code execution on the development machine. This vulnerability also creates risks for organizations that rely on Xcode for enterprise application development, as compromised development environments could result in the creation of malicious applications or the theft of sensitive intellectual property.
Organizations should prioritize immediate remediation by upgrading to Xcode 10 or later versions that contain the necessary input validation improvements. System administrators should conduct comprehensive inventory audits to identify all instances of older Xcode versions within their development environments and ensure proper patch management protocols are implemented. Additional mitigations include implementing secure coding practices for Xcode usage, establishing development environment hardening procedures, and monitoring for suspicious compilation activities. The vulnerability also highlights the importance of supply chain security and the need for regular security assessments of development tools. According to ATT&CK framework, this vulnerability maps to technique T1553.003 "Subvert Trust Controls: Code Signing" and T1059.001 "Command and Scripting Interpreter: PowerShell" as potential exploitation vectors that could leverage the compromised development environment for further attacks.