Intrusion PreventionDNSmasq.DNS.and.DHCP.CVE-2020-25681.Out.of.Bounds.Write
Description
This indicates an attack attempt to exploit an Out of Bounds Write Vulnerability in DNSmasq/Mikrotik DNSmasq.
The vulnerability is in processing canonical names of a RR record in the get_rdata() function while sorting RR records. A remote, unauthenticated attacker can exploit this vulnerability by sending a DNS query to a Dnsmasq server that receives a malicious DNS response. Successful exploitation could result in arbitrary code execution in the security context of the Dnsmasq process. Unsuccessful exploitation results in a crash of the Dnsmasq process leading to a denial-of-service condition.
Affected Products
DNSmasq/Mikrotik 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
Telemetry
Coverage
| IPS (Regular DB) | |
| IPS (Extended DB) |
Version Updates
| Date | Version | Detail |
|---|---|---|
| 2022-09-20 | 22.397 | Sig Added |
| 2021-03-16 | 18.036 | Sig Added |
| 2021-02-22 | 17.020 | Default_action:pass:drop |
| 2021-02-08 | 17.012 |
| ID | 49797 |
| Created | Jan 28, 2021 |
| Updated | Sep 19, 2022 |
| Risk |
|
| CVE ID | CVE-2020-25681 |
| Exploit Prediction Score | 15.94% |
| Default Action | drop |
| Active | |
| Affected OS | Linux |
| Affected App | Other |