CVE-2023-41045 : What You Need to Know

Graylog has been found to have an insecure source port usage for DNS queries, potentially leading to DNS cache poisoning attacks. This vulnerability has been assigned a CVSS base score of 3.7.

Understanding CVE-2023-41045

This CVE identifies the issue of Graylog using only one single source port for DNS queries, making it susceptible to DNS cache poisoning attacks.

What is CVE-2023-41045?

Graylog, a log management platform, binds a single socket for outgoing DNS queries to a fixed port number, which increases the risk of DNS cache poisoning attacks by allowing forged DNS responses into the lookup table cache.

The Impact of CVE-2023-41045

An external attacker could potentially inject malicious DNS responses into Graylog's cache, compromising the integrity of the data and posing security risks to the system.

Technical Details of CVE-2023-41045

This section provides detailed technical information about the vulnerability.

Vulnerability Description

Graylog uses a single source port for DNS queries, making it vulnerable to DNS cache poisoning attacks due to the predictable nature of the source port usage.

Affected Systems and Versions

Versions of Graylog2 up to 5.0.9 and between 5.1.0 to 5.1.3 are affected by this vulnerability.

Exploitation Mechanism

Attackers can potentially exploit this vulnerability by injecting forged DNS responses into Graylog's cache, leading to data manipulation and security breaches.

Mitigation and Prevention

To secure systems against CVE-2023-41045, immediate steps and long-term security practices are recommended.

Immediate Steps to Take

Users are advised to upgrade their Graylog installations to versions 5.0.9 or 5.1.3 to mitigate the risk of DNS cache poisoning attacks.

Long-Term Security Practices

Implementing a security best practice of distributing DNS queries through a pool of distinct sockets with random source ports can help prevent similar vulnerabilities.

Patching and Updates

Regularly applying security patches and updates from Graylog2 can help keep systems protected against known vulnerabilities.