CVE-2018-6555 : What You Need to Know
Learn about CVE-2018-6555, a use-after-free vulnerability in the Linux Kernel before 4.17, allowing local users to trigger a denial of service attack. Find mitigation steps and preventive measures here.
In the Linux kernel version before 4.17, a vulnerability exists in the irda_setsockopt function that can be exploited by local users to trigger a denial of service attack. This vulnerability involves a use-after-free issue in the ias_object, potentially leading to a system crash or other consequences when manipulated through an AF_IRDA socket.
Understanding CVE-2018-6555
This CVE entry pertains to a specific vulnerability in the Linux Kernel before version 4.17.
What is CVE-2018-6555?
The CVE-2018-6555 vulnerability is a use-after-free flaw in the irda_setsockopt function within the Linux kernel, allowing local users to initiate a denial of service attack.
The Impact of CVE-2018-6555
The exploitation of this vulnerability can result in a system crash or potentially lead to other unspecified consequences, posing a risk to the affected systems.
Technical Details of CVE-2018-6555
This section provides more in-depth technical details about the CVE-2018-6555 vulnerability.
Vulnerability Description
The irda_setsockopt function in the Linux kernel before version 4.17 allows local users to cause a denial of service or potentially have other impacts via an AF_IRDA socket due to a use-after-free vulnerability.
Affected Systems and Versions
- Product: Linux Kernel
- Vendor: Linux Kernel
- Versions Affected: Before 4.17
Exploitation Mechanism
The vulnerability can be exploited by local users through the manipulation of the ias_object, potentially leading to a system crash or other consequences.
Mitigation and Prevention
To address the CVE-2018-6555 vulnerability, it is crucial to implement appropriate mitigation strategies and preventive measures.
Immediate Steps to Take
- Apply relevant security patches provided by the Linux Kernel maintainers.
- Monitor for any unusual system behavior that could indicate exploitation of the vulnerability.
Long-Term Security Practices
- Regularly update the Linux Kernel to the latest stable version to mitigate known vulnerabilities.
- Implement least privilege access controls to limit the impact of potential attacks.
Patching and Updates
Ensure timely installation of security patches released by the Linux Kernel maintainers to address the CVE-2018-6555 vulnerability.