Intrusion Prevention

DNSmasq.extract_name.Out.of.Bounds.Write

Description

This indicates an attack attempt to exploit an Out of Bounds Write Vulnerability in Dnsmasq.
The vulnerability occurs while extracting domain name of a RR record using the extract_name() function while sorting multiple RR records. A remote, unauthenticated attacker can run a server to send a specially crafted DNS reply to a target server. Successful exploitation leads to denial-of-service conditions or in worst case arbitrary code execution with administrative privileges.

Affected Products

Dnsmasq Dnsmasq prior to 2.83

Impact

System Compromise: Remote attackers can gain control of vulnerable systems.

Recommended Actions

Apply the most recent upgrade or patch from the vendor.
http://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2021q1/014599.html

CVE References

CVE-2020-25682