CVE-2019-17054 : Exploit Details and Defense Strategies
Learn about CVE-2019-17054 affecting the Linux kernel up to version 5.3.2. Unprivileged users can exploit this vulnerability to create a raw socket, potentially leading to security breaches. Find mitigation steps and prevention measures here.
The Linux kernel, specifically the AF_APPLETALK network module, has a vulnerability in the atalk_create function located in net/appletalk/ddp.c. This vulnerability allows unprivileged users to create a raw socket without enforcing the CAP_NET_RAW capability.
Understanding CVE-2019-17054
This CVE affects the Linux kernel versions up to 5.3.2 and is also known as CID-6cc03e8aa36c.
What is CVE-2019-17054?
atalk_create in net/appletalk/ddp.c in the AF_APPLETALK network module in the Linux kernel through 5.3.2 does not enforce CAP_NET_RAW, allowing unprivileged users to create a raw socket.
The Impact of CVE-2019-17054
This vulnerability could be exploited by unprivileged users to create a raw socket, potentially leading to unauthorized network communication and security breaches.
Technical Details of CVE-2019-17054
The following technical details provide insight into the vulnerability:
Vulnerability Description
The atalk_create function in the AF_APPLETALK network module in the Linux kernel up to version 5.3.2 does not enforce the CAP_NET_RAW capability, enabling unprivileged users to create a raw socket.
Affected Systems and Versions
- Product: n/a
- Vendor: n/a
- Versions affected: Up to 5.3.2
Exploitation Mechanism
Unprivileged users can exploit this vulnerability to create a raw socket without the necessary CAP_NET_RAW capability, potentially leading to unauthorized network activities.
Mitigation and Prevention
To address CVE-2019-17054, consider the following mitigation strategies:
Immediate Steps to Take
- Apply the latest security updates provided by the Linux kernel maintainers.
- Monitor network activities for any suspicious behavior that could indicate exploitation of this vulnerability.
Long-Term Security Practices
- Implement the principle of least privilege to restrict unprivileged users' capabilities.
- Regularly review and update access control policies to prevent unauthorized socket creation.
Patching and Updates
- Stay informed about security advisories and patches released by Linux distributions and the Linux kernel community.
- Promptly apply patches to mitigate known vulnerabilities and enhance system security.