CVE-2023-39197 : Vulnerability Insights and Analysis
Learn about CVE-2023-39197, a moderate out-of-bounds vulnerability in Linux kernel's Netfilter Connection Tracking allowing remote information disclosure. Find mitigation strategies here.
An out-of-bounds read vulnerability was found in Netfilter Connection Tracking (conntrack) in the Linux kernel. This flaw allows a remote user to disclose sensitive information via the DCCP protocol.
Understanding CVE-2023-39197
This section will provide insights into the impact, technical details, and mitigation strategies related to CVE-2023-39197.
What is CVE-2023-39197?
CVE-2023-39197 is an out-of-bounds read vulnerability in the Linux kernel's Netfilter Connection Tracking (conntrack) component. It enables a remote attacker to uncover sensitive data using the DCCP protocol.
The Impact of CVE-2023-39197
The vulnerability's impact is rated as moderate with a CVSS base score of 4.0. Attackers can exploit this flaw over a network without requiring privileges. Although it does not impact availability, it poses a risk to confidentiality.
Technical Details of CVE-2023-39197
Let's delve deeper into the vulnerability's description, affected systems, versions, and how exploitation occurs.
Vulnerability Description
The vulnerability in conntrack of the Linux kernel allows for an out-of-bounds read, leading to information disclosure via DCCP.
Affected Systems and Versions
- Kernel: All versions
- Red Hat Enterprise Linux 6: Affected
- Red Hat Enterprise Linux 7: Affected
- Red Hat Enterprise Linux 8: Unaffected
- Red Hat Enterprise Linux 9: Unaffected
- Fedora: Affected
Exploitation Mechanism
The flaw can be exploited remotely by sending crafted DCCP protocol packets to the vulnerable system, triggering the out-of-bounds read.
Mitigation and Prevention
Discover the immediate steps and long-term practices to protect your systems from CVE-2023-39197.
Immediate Steps to Take
- Apply vendor patches promptly to address the vulnerability.
- Implement network monitoring to detect any malicious activity targeting conntrack.
Long-Term Security Practices
- Regularly update the kernel and associated packages.
- Follow security best practices to minimize the risk of exploitation.
Patching and Updates
Refer to the respective vendor links provided to access patches and updates for the affected systems.