CVE-2019-19767 : Vulnerability Insights and Analysis
Discover the impact of CVE-2019-19767, a vulnerability in the Linux kernel prior to version 5.4.2. Learn about affected systems, exploitation mechanisms, and mitigation steps.
CVE-2019-19767, also known as CID-4ea99936a163, exposes a vulnerability in the Linux kernel prior to version 5.4.2. This flaw involves the mishandling of ext4_expand_extra_isize, leading to use-after-free errors in specific functions within the ext4 file system.
Understanding CVE-2019-19767
This section provides insights into the nature and impact of the CVE-2019-19767 vulnerability.
What is CVE-2019-19767?
The vulnerability in the Linux kernel prior to version 5.4.2 arises from the mishandling of ext4_expand_extra_isize, resulting in use-after-free errors within certain functions.
The Impact of CVE-2019-19767
The vulnerability manifests in use-after-free errors within the __ext4_expand_extra_isize and ext4_xattr_set_entry functions, specifically in the inode.c and super.c files of the ext4 file system.
Technical Details of CVE-2019-19767
Explore the technical aspects of the CVE-2019-19767 vulnerability.
Vulnerability Description
The flaw in the Linux kernel prior to version 5.4.2 involves the mishandling of ext4_expand_extra_isize, leading to use-after-free errors in specific functions within the ext4 file system.
Affected Systems and Versions
- Product: Not applicable
- Vendor: Not applicable
- Versions: Linux kernel versions before 5.4.2
Exploitation Mechanism
The vulnerability can be exploited through use-after-free errors within the __ext4_expand_extra_isize and ext4_xattr_set_entry functions in the inode.c and super.c files of the ext4 file system.
Mitigation and Prevention
Learn how to mitigate and prevent the CVE-2019-19767 vulnerability.
Immediate Steps to Take
- Update to Linux kernel version 5.4.2 or later to address the vulnerability.
- Monitor vendor advisories and apply patches promptly.
Long-Term Security Practices
- Regularly update and patch the Linux kernel to protect against known vulnerabilities.
- Implement secure coding practices to prevent similar issues in the future.
Patching and Updates
Ensure timely installation of security updates and patches to maintain a secure system.