CVE-2019-8721 Explained : Impact and Mitigation
Learn about CVE-2019-8721 affecting Xcode ld64 toolchains. Compiling code without input validation in Xcode 11.0 could lead to arbitrary code execution. Find mitigation steps here.
Xcode vulnerability that could lead to arbitrary code execution.
Understanding CVE-2019-8721
What is CVE-2019-8721?
Multiple issues in ld64 in Xcode toolchains were addressed by updating to version ld64-507.4. Compiling code without proper input validation could lead to arbitrary code execution with user privilege.
The Impact of CVE-2019-8721
Compiling code without adequate input validation poses a risk of potential arbitrary code execution with user privileges.
Technical Details of CVE-2019-8721
Vulnerability Description
The ld64 problems in Xcode were resolved by updating to ld64-507.4. This issue is fixed in Xcode 11.0.
Affected Systems and Versions
- Product: Xcode
- Vendor: Apple
- Versions Affected: Less than Xcode 11.0
Exploitation Mechanism
Compiling code without proper input validation could result in arbitrary code execution with user privileges.
Mitigation and Prevention
Immediate Steps to Take
- Update Xcode to version 11.0 or later.
- Ensure proper input validation in code compilation processes.
Long-Term Security Practices
- Regularly update Xcode and associated toolchains.
- Implement secure coding practices to prevent arbitrary code execution.
Patching and Updates
Apply patches and updates provided by Apple to address the ld64 issues in Xcode.