CVE-2020-24697 : Vulnerability Insights and Analysis
Discover the impact of CVE-2020-24697 on PowerDNS Authoritative through version 4.3.0. Learn about the vulnerability, affected systems, exploitation method, and mitigation steps.
An issue was discovered in PowerDNS Authoritative through 4.3.0 when --enable-experimental-gss-tsig is used. A remote, unauthenticated attacker can cause a denial of service by sending crafted queries with a GSS-TSIG signature.
Understanding CVE-2020-24697
This CVE identifies a vulnerability in PowerDNS Authoritative that can lead to a denial of service attack.
What is CVE-2020-24697?
The vulnerability in PowerDNS Authoritative through version 4.3.0 allows a remote, unauthenticated attacker to trigger a denial of service by sending specially crafted queries with a GSS-TSIG signature.
The Impact of CVE-2020-24697
The exploitation of this vulnerability can result in a denial of service, disrupting the availability of the affected PowerDNS Authoritative service.
Technical Details of CVE-2020-24697
This section provides more technical insights into the vulnerability.
Vulnerability Description
The issue arises in PowerDNS Authoritative through version 4.3.0 when the --enable-experimental-gss-tsig feature is enabled, allowing attackers to exploit the service through crafted queries.
Affected Systems and Versions
- Product: PowerDNS Authoritative
- Vendor: N/A
- Versions: All versions up to and including 4.3.0
Exploitation Mechanism
Attackers can exploit this vulnerability remotely and without authentication by sending malicious queries with a GSS-TSIG signature.
Mitigation and Prevention
Protecting systems from CVE-2020-24697 requires immediate actions and long-term security measures.
Immediate Steps to Take
- Disable the --enable-experimental-gss-tsig feature in PowerDNS Authoritative to mitigate the risk of exploitation.
- Monitor network traffic for any signs of suspicious activity targeting the DNS service.
Long-Term Security Practices
- Regularly update PowerDNS Authoritative to the latest version to patch known vulnerabilities.
- Implement network segmentation and access controls to limit exposure to potential attacks.
- Stay informed about security advisories and best practices for securing DNS services.
Patching and Updates
Ensure timely application of patches and updates released by PowerDNS to address security vulnerabilities and enhance system security.