CVE-2021-45953 : Security Advisory and Response
Learn about CVE-2021-45953, a disputed heap-based buffer overflow vulnerability in Dnsmasq 2.86. Find out the impact, affected systems, exploitation mechanism, and mitigation steps.
Dnsmasq 2.86 has a heap-based buffer overflow vulnerability. This CVE entry is disputed by the vendor.
Understanding CVE-2021-45953
What is CVE-2021-45953?
CVE-2021-45953 refers to a heap-based buffer overflow in Dnsmasq 2.86, specifically in the extract_name function called from hash_questions and fuzz_util.c.
The Impact of CVE-2021-45953
The impact of this CVE is disputed by the vendor, who claims that CVE-2021-45951 through CVE-2021-45957 do not represent real vulnerabilities.
Technical Details of CVE-2021-45953
Vulnerability Description
The vulnerability lies in a heap-based buffer overflow in the extract_name function of Dnsmasq 2.86.
Affected Systems and Versions
- Product: n/a
- Version: n/a
Exploitation Mechanism
The heap-based buffer overflow occurs in the extract_name function, leading to a potential security risk.
Mitigation and Prevention
Immediate Steps to Take
- Monitor vendor communications for updates regarding the disputed status of this vulnerability.
- Implement network-level protections to mitigate potential attacks.
Long-Term Security Practices
- Stay informed about security advisories related to Dnsmasq and update systems accordingly.
Patching and Updates
Stay updated on any vendor-released patches or fixes for Dnsmasq to address the disputed vulnerabilities.