CVE-2017-6347 : Vulnerability Insights and Analysis
Discover the impact of CVE-2017-6347, a Linux kernel vulnerability allowing local users to cause a denial of service or other effects. Learn about affected systems, exploitation, and mitigation steps.
In the Linux kernel before version 4.10.1, a vulnerability exists in the ip_cmsg_recv_checksum function that can be exploited by local users to cause a denial of service or potentially have other effects. This CVE was published on March 1, 2017.
Understanding CVE-2017-6347
This section provides insights into the nature and impact of the CVE-2017-6347 vulnerability.
What is CVE-2017-6347?
The ip_cmsg_recv_checksum function in the Linux kernel before 4.10.1 has incorrect assumptions about the layout of skb data. This flaw allows local users to trigger a denial of service, like a buffer over-read, or potentially achieve other unspecified impacts by utilizing the MSG_MORE flag with loopback UDP transmission.
The Impact of CVE-2017-6347
The vulnerability can lead to a denial of service condition or other unspecified effects when exploited by local users.
Technical Details of CVE-2017-6347
This section delves into the technical aspects of the CVE-2017-6347 vulnerability.
Vulnerability Description
The ip_cmsg_recv_checksum function in net/ipv4/ip_sockglue.c in the Linux kernel before 4.10.1 incorrectly handles skb data layout, enabling local users to cause a denial of service or other impacts through crafted system calls.
Affected Systems and Versions
- Product: Not applicable
- Vendor: Not applicable
- Versions: All versions before Linux kernel 4.10.1
Exploitation Mechanism
The exploitation involves local users utilizing the MSG_MORE flag in combination with loopback UDP transmission to trigger the vulnerability.
Mitigation and Prevention
Learn how to mitigate and prevent the CVE-2017-6347 vulnerability.
Immediate Steps to Take
- Apply patches provided by the Linux kernel maintainers promptly.
- Monitor official sources for updates and security advisories related to the Linux kernel.
Long-Term Security Practices
- Regularly update the Linux kernel to the latest stable version.
- Implement least privilege principles to limit the impact of potential vulnerabilities.
Patching and Updates
- Keep the Linux kernel up to date with the latest security patches.