Dnsmasq CVE-2019-14834 Remote Denial of Service Vulnerability

Description

Dnsmasq is prone to a remote denial-of-service vulnerability. An attacker can exploit this issue to cause a denial-of-service condition, denying service to legitimate users. Dnsmasq versions 2.90 and prior are vulnerable.

Technologies Affected

• Dnsmasq Dnsmasq 2.0.0
• Dnsmasq Dnsmasq 2.1.0
• Dnsmasq Dnsmasq 2.10.0
• Dnsmasq Dnsmasq 2.11.0
• Dnsmasq Dnsmasq 2.12.0
• Dnsmasq Dnsmasq 2.13.0
• Dnsmasq Dnsmasq 2.14.0
• Dnsmasq Dnsmasq 2.15.0
• Dnsmasq Dnsmasq 2.16.0
• Dnsmasq Dnsmasq 2.17.0
• Dnsmasq Dnsmasq 2.18.0
• Dnsmasq Dnsmasq 2.19.0
• Dnsmasq Dnsmasq 2.2.0
• Dnsmasq Dnsmasq 2.20.0
• Dnsmasq Dnsmasq 2.21.0
• Dnsmasq Dnsmasq 2.22.0
• Dnsmasq Dnsmasq 2.29.0
• Dnsmasq Dnsmasq 2.30
• Dnsmasq Dnsmasq 2.35
• Dnsmasq Dnsmasq 2.4.0
• Dnsmasq Dnsmasq 2.4.1
• Dnsmasq Dnsmasq 2.40
• Dnsmasq Dnsmasq 2.41
• Dnsmasq Dnsmasq 2.42
• Dnsmasq Dnsmasq 2.43
• Dnsmasq Dnsmasq 2.44
• Dnsmasq Dnsmasq 2.45
• Dnsmasq Dnsmasq 2.46
• Dnsmasq Dnsmasq 2.47
• Dnsmasq Dnsmasq 2.48
• Dnsmasq Dnsmasq 2.49
• Dnsmasq Dnsmasq 2.5.0
• Dnsmasq Dnsmasq 2.50
• Dnsmasq Dnsmasq 2.6.0
• Dnsmasq Dnsmasq 2.62
• Dnsmasq Dnsmasq 2.7.0
• Dnsmasq Dnsmasq 2.80
• Dnsmasq Dnsmasq 2.90

Recommendations

Run all software as a nonprivileged user with minimal access rights.
To reduce the impact of latent vulnerabilities, run the application with the minimal amount of privileges required for functionality.

Deploy network intrusion detection systems to monitor network traffic for malicious activity.
Deploy NIDS to monitor network traffic for signs of anomalous or suspicious activity including unexplained incoming and outgoing traffic. This may indicate exploit attempts or activity that results from successful exploits.

Do not accept or execute files from untrusted or unknown sources.
To reduce the likelihood of successful exploits, never handle files that originate from unfamiliar or untrusted sources.

Updates are available. Please see the references or vendor advisory for more information.