CVE-2020-25683
5.9 · MEDIUMOverview
CVE-2020-25683 is a medium-severity vulnerability affecting thekelleys dnsmasq. It was published on January 20, 2021 and has a CVSS 3.1 base score of 5.9 (MEDIUM).
This vulnerability has a CVSS 3.1 base score of 5.9, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical Description
A flaw was found in dnsmasq before version 2.83. A heap-based buffer overflow was discovered in dnsmasq when DNSSEC is enabled and before it validates the received DNS entries. A remote attacker, who can create valid DNS replies, could use this flaw to cause an overflow in a heap-allocated memory. This flaw is caused by the lack of length checks in rfc1035.c:extract_name(), which could be abused to make the code execute memcpy() with a negative size in get_rdata() and cause a crash in dnsmasq, resulting in a denial of service. The highest threat from this vulnerability is to system availability.
Remediation
Check the references section for vendor advisories and patches from thekelleys. Update dnsmasq to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| thekelleys | dnsmasq | >= 0, < 2.83 | Affected |
References
Frequently Asked Questions
What is CVE-2020-25683?
CVE-2020-25683 is a medium-severity vulnerability affecting thekelleys dnsmasq. It was published on January 20, 2021 and has a CVSS 3.1 base score of 5.9 (MEDIUM).
How severe is CVE-2020-25683?
This vulnerability has a CVSS 3.1 base score of 5.9, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2020-25683?
Check the references section for vendor advisories and patches from thekelleys. Update dnsmasq to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2020-25683?
CyberStrike's AI-powered security agents can automatically detect CVE-2020-25683 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
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