CVE-2018-10883 : Security Advisory and Response
Learn about CVE-2018-10883, a vulnerability in the Linux kernel's ext4 filesystem that can lead to a denial of service and system crash. Find mitigation steps and long-term security practices here.
The Linux kernel's ext4 filesystem vulnerability allows a local user to trigger an out-of-bounds write, leading to a denial of service and potential system crash.
Understanding CVE-2018-10883
This CVE involves a vulnerability in the Linux kernel's ext4 filesystem that can be exploited by a local user.
What is CVE-2018-10883?
The vulnerability in the ext4 filesystem can be triggered by a local user manipulating a crafted ext4 filesystem image, resulting in an out-of-bounds write in the jbd2_journal_dirty_metadata() function.
The Impact of CVE-2018-10883
The exploitation of this vulnerability can lead to a denial of service condition and potentially cause a system crash.
Technical Details of CVE-2018-10883
This section provides more technical insights into the CVE-2018-10883 vulnerability.
Vulnerability Description
The vulnerability allows a local user to perform an out-of-bounds write in the jbd2_journal_dirty_metadata() function of the Linux kernel's ext4 filesystem.
Affected Systems and Versions
- Product: Kernel
- Vendor: [UNKNOWN]
- Versions: N/A
Exploitation Mechanism
- Attack Complexity: High
- Attack Vector: Physical
- Availability Impact: High
- Base Score: 4.8 (Medium)
- Privileges Required: None
- Scope: Unchanged
- User Interaction: None
- Vector String: CVSS:3.0/AV:P/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H
- CWE-787: Out-of-bounds Write (CWE-787)
Mitigation and Prevention
Protecting systems from CVE-2018-10883 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Apply relevant patches and updates provided by the vendor.
- Monitor vendor advisories for any new information or patches related to this vulnerability.
Long-Term Security Practices
- Regularly update and patch the Linux kernel and related components.
- Implement least privilege access controls to limit the impact of potential vulnerabilities.
- Conduct regular security assessments and audits to identify and address any security gaps.
Patching and Updates
- Refer to vendor-specific security advisories for patching instructions and updates.