CVE-2017-5970 : What You Need to Know

In the Linux kernel up to version 4.9.9, a vulnerability exists in the ipv4_pktinfo_prepare function in the net/ipv4/ip_sockglue.c file. This flaw can be exploited by attackers to trigger a denial of service, leading to a system crash. The vulnerability can be activated by either a malicious application making system calls or by using IPv4 traffic with invalid IP options.

Understanding CVE-2017-5970

This CVE entry pertains to a vulnerability in the Linux kernel that can result in a denial of service.

What is CVE-2017-5970?

The CVE-2017-5970 vulnerability is present in the Linux kernel up to version 4.9.9, specifically in the ipv4_pktinfo_prepare function in the net/ipv4/ip_sockglue.c file. Attackers can exploit this flaw to cause a denial of service, resulting in a system crash.

The Impact of CVE-2017-5970

The vulnerability allows attackers to trigger a denial of service, potentially leading to system instability or crashes.

Technical Details of CVE-2017-5970

This section provides technical details about the CVE-2017-5970 vulnerability.

Vulnerability Description

The ipv4_pktinfo_prepare function in net/ipv4/ip_sockglue.c in the Linux kernel through 4.9.9 enables attackers to induce a denial of service (system crash) through crafted system calls or potentially via IPv4 traffic with invalid IP options.

Affected Systems and Versions

Linux kernel versions up to 4.9.9

Exploitation Mechanism

Attackers can exploit the vulnerability by using malicious system calls or by sending IPv4 traffic with invalid IP options.

Mitigation and Prevention

Protecting systems from CVE-2017-5970 requires immediate actions and long-term security practices.

Immediate Steps to Take

Apply patches provided by the Linux kernel maintainers promptly.
Monitor system logs for any unusual activity that might indicate exploitation attempts.

Long-Term Security Practices

Regularly update the Linux kernel to the latest stable version to mitigate known vulnerabilities.
Implement network security measures to detect and block malicious traffic.

Patching and Updates

Stay informed about security advisories and patches released by the Linux kernel community.
Follow best practices for system hardening and security configuration.