CVE-2019-15792 : Vulnerability Insights and Analysis
Learn about CVE-2019-15792, a high-severity vulnerability in the Linux kernel's shiftfs modification in Ubuntu 5.0 and 5.3 series, potentially leading to denial of service or arbitrary code execution. Find out how to mitigate this issue.
A vulnerability in the Linux kernel, specifically in the Ubuntu 5.0 and 5.3 kernel series, allows for type confusion in shiftfs, potentially leading to denial of service or arbitrary code execution.
Understanding CVE-2019-15792
This CVE involves a type confusion issue in the shiftfs modification within the Linux kernel, affecting specific versions in the Ubuntu distribution.
What is CVE-2019-15792?
CVE-2019-15792 is a vulnerability in the Linux kernel's shiftfs modification present in Ubuntu 5.0 and 5.3 kernel series. It stems from a non-upstream patch that mishandles a specific function, potentially enabling attackers to disrupt services or execute unauthorized code.
The Impact of CVE-2019-15792
The vulnerability poses a high severity risk with a CVSS base score of 7.1. It can lead to a denial of service or arbitrary code execution, impacting the integrity and availability of affected systems.
Technical Details of CVE-2019-15792
This section delves into the technical aspects of the vulnerability.
Vulnerability Description
The issue arises from a function in the shiftfs modification that mishandles a specific file pointer, potentially allowing attackers to exploit the system.
Affected Systems and Versions
- Ubuntu 5.0 kernel version 5.0.0-35.38
- Ubuntu 5.3 kernel version 5.3.0-11.12
Exploitation Mechanism
Attackers can leverage the mishandled file pointer to trigger a denial of service or execute arbitrary code, exploiting the type confusion vulnerability.
Mitigation and Prevention
Protecting systems from CVE-2019-15792 requires immediate actions and long-term security measures.
Immediate Steps to Take
- Apply patches provided by Ubuntu to address the vulnerability promptly.
- Monitor for any unusual system behavior that could indicate exploitation.
Long-Term Security Practices
- Regularly update and patch systems to prevent known vulnerabilities.
- Implement access controls and restrictions to limit potential attack surfaces.
Patching and Updates
Ensure that systems are regularly updated with the latest security patches to mitigate the risk of exploitation.