CVE-2019-19814 : Exploit Details and Defense Strategies
Learn about CVE-2019-19814, a vulnerability in Linux kernel 5.0.21 that allows for a slab-out-of-bounds write access when mounting a manipulated f2fs filesystem image. Find mitigation steps and prevention measures here.
A vulnerability in the Linux kernel version 5.0.21 could allow an attacker to trigger a slab-out-of-bounds write access when mounting a manipulated f2fs filesystem image.
Understanding CVE-2019-19814
When mounting a crafted f2fs filesystem image in the Linux kernel version 5.0.21, an issue may arise due to a restricted array that can lead to unexpected behavior.
What is CVE-2019-19814?
This CVE describes a vulnerability in the Linux kernel version 5.0.21 that can be exploited by mounting a manipulated f2fs filesystem image, potentially leading to a slab-out-of-bounds write access.
The Impact of CVE-2019-19814
The vulnerability could allow an attacker to trigger unexpected behavior in the kernel, potentially leading to a security compromise or system instability.
Technical Details of CVE-2019-19814
The technical details of this CVE provide insight into the specific aspects of the vulnerability.
Vulnerability Description
The issue arises from the __remove_dirty_segment function encountering a slab-out-of-bounds write access due to array restrictions in the Linux kernel version 5.0.21.
Affected Systems and Versions
- Affected System: Linux kernel version 5.0.21
- Affected Component: f2fs filesystem image
Exploitation Mechanism
By mounting a manipulated f2fs filesystem image, an attacker can exploit the restricted array in the kernel, potentially causing a slab-out-of-bounds write access.
Mitigation and Prevention
It is crucial to take immediate steps to mitigate the risks posed by CVE-2019-19814.
Immediate Steps to Take
- Apply patches or updates provided by the Linux kernel maintainers.
- Avoid mounting untrusted or manipulated filesystem images.
Long-Term Security Practices
- Regularly update the Linux kernel to the latest stable version.
- Implement proper access controls and restrictions on filesystem mounting.
Patching and Updates
- Stay informed about security advisories related to the Linux kernel.
- Apply patches promptly to address known vulnerabilities.