CVE-2019-17055 : What You Need to Know
Learn about CVE-2019-17055, a vulnerability in the Linux kernel allowing unprivileged users to create raw sockets. Find mitigation steps and prevention measures here.
The base_sock_create function in the socket.c file of the AF_ISDN network module in the Linux kernel up to version 5.3.2 allows unprivileged users to create a raw socket, posing a security risk.
Understanding CVE-2019-17055
This CVE identifies a vulnerability in the Linux kernel that could be exploited by unprivileged users to create a raw socket.
What is CVE-2019-17055?
The base_sock_create function in the AF_ISDN network module in the Linux kernel up to version 5.3.2 does not properly enforce the CAP_NET_RAW capability. This oversight enables unprivileged users to create a raw socket, also known as CID-b91ee4aa2a21.
The Impact of CVE-2019-17055
The vulnerability allows unauthorized users to create raw sockets, potentially leading to further exploitation and security breaches.
Technical Details of CVE-2019-17055
This section delves into the technical aspects of the CVE.
Vulnerability Description
The base_sock_create function in the AF_ISDN network module in the Linux kernel through version 5.3.2 does not enforce CAP_NET_RAW, enabling unprivileged users to create a raw socket, identified as CID-b91ee4aa2a21.
Affected Systems and Versions
- Linux kernel versions up to 5.3.2
Exploitation Mechanism
Unprivileged users can exploit this vulnerability to create raw sockets, potentially leading to unauthorized network access and attacks.
Mitigation and Prevention
Protecting systems from CVE-2019-17055 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Apply relevant security patches promptly
- Monitor network activity for suspicious behavior
- Restrict user privileges to minimize potential risks
Long-Term Security Practices
- Regularly update and patch the Linux kernel
- Implement network segmentation to limit the impact of potential breaches
- Conduct security audits and penetration testing to identify vulnerabilities
Patching and Updates
Ensure that the Linux kernel is regularly updated with the latest security patches to mitigate the risk of exploitation.