CVE-2019-19339 : Exploit Details and Defense Strategies
Learn about CVE-2019-19339, a vulnerability in Intel CPUs affecting Red Hat systems. Find out the impact, technical details, and mitigation steps for this security issue.
This CVE involves a vulnerability in the way Intel CPUs handle memory address translations, potentially leading to a denial of service situation.
Understanding CVE-2019-19339
This CVE identifies a flaw in Intel CPUs that could be exploited by a privileged guest user to cause a severe denial of service on the host processor.
What is CVE-2019-19339?
The vulnerability allows a guest user to induce a hardware Machine Check Error on the host processor, causing it to halt, leading to a denial of service situation.
The Impact of CVE-2019-19339
- CVSS Base Score: 6.5 (Medium Severity)
- Attack Vector: Local
- Attack Complexity: Low
- Availability Impact: High
- Scope: Changed
- Privileges Required: Low
- CWE ID: CWE-805
Technical Details of CVE-2019-19339
This section provides detailed technical information about the vulnerability.
Vulnerability Description
The vulnerability arises from inconsistencies in virtual and physical memory address translations in Intel CPUs, leading to a Machine Check Error and processor halting.
Affected Systems and Versions
- Product: kpatch
- Vendor: Red Hat
- Affected Versions: Not applicable
Exploitation Mechanism
- System software modifications to Paging structure entries can lead to invalid address translations in the processor's TLB cache, triggering a Machine Check Error.
Mitigation and Prevention
Steps to address and prevent exploitation of the CVE.
Immediate Steps to Take
- Apply security patches provided by Red Hat promptly.
- Monitor vendor channels for updates and advisories.
Long-Term Security Practices
- Regularly update system software and firmware.
- Implement secure coding practices to mitigate similar vulnerabilities.
Patching and Updates
- Ensure all relevant security patches are applied to affected systems.