Vulnerability in dnsmasq - security update
Summary
DLA-1124-1: dnsmasq - security update. Affects dnsmasq versions < 2.62-3+deb7u4. Fixed in 2.62-3+deb7u4. How to fix ↓
Check if this vulnerability affects your application
Upload a manifest or SBOM and we'll show whether you're affected, plus every other risky package in the same scan.
No signup required · Results in about 60 seconds
Background
dnsmasq is a small caching DNS proxy and DHCP/TFTP server. It is commonly used to provide DNS and DHCP services for small networks or as a caching DNS resolver for larger networks. dnsmasq is vulnerable to several security issues that have been discovered by the Google Security Team. These vulnerabilities can lead to denial of service, information leakage, or the execution of arbitrary code.
Vulnerability Detail
The vulnerabilities in dnsmasq include:
-
Denial of Service (CVE-2017-14491): An attacker can send crafted DNS packets to dnsmasq, causing it to crash or consume excessive resources.
-
Information Leakage (CVE-2017-14492): A flaw in the DNSSEC validation code allows an attacker to leak memory contents, potentially exposing sensitive information.
-
Arbitrary Code Execution (CVE-2017-14494): A heap-based buffer overflow vulnerability in the DHCPv6 code allows an attacker to execute arbitrary code on the target system.
These vulnerabilities pose a significant risk to systems running dnsmasq, as they can be exploited by remote attackers to disrupt services, gain unauthorized access to sensitive information, or execute malicious code.
How To Fix
Minimum fixed version
2.62-3+deb7u4
This is the first release that contains the fix.
sudo apt-get install --only-upgrade dnsmasqTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
There are no known workarounds for these vulnerabilities. It is essential to apply the security updates as soon as possible to mitigate the risk of exploitation.
Conclusion
The vulnerabilities in dnsmasq pose a significant risk to systems running this software. It is crucial to upgrade to the latest version and apply the provided security patches to mitigate the risk of exploitation. For further support on vulnerability remediation, you can contact DevNack.com.
See every vulnerability recorded for dnsmasq →
FAQ
dnsmasq is a small caching DNS proxy and DHCP/TFTP server used to provide DNS and DHCP services for small networks or as a caching DNS resolver for larger networks.
These vulnerabilities can lead to denial of service, information leakage, or the execution of arbitrary code. Attackers can exploit these vulnerabilities remotely to disrupt services, gain unauthorized access to sensitive information, or execute malicious code.
To fix these vulnerabilities, it is recommended to upgrade to version 2.62-3+deb7u4 of dnsmasq. This version includes patches that address the identified security issues. You can obtain the updated packages from the Debian repository or through the package manager on your system.
There are no known workarounds for these vulnerabilities. It is essential to apply the security updates as soon as possible to mitigate the risk of exploitation.
You can find more information about Debian LTS security advisories, including how to apply updates and frequently asked questions, on the Debian LTS wiki: https://wiki.debian.org/LTS
Related vulnerabilities
Recent vulnerabilities recorded for dnsmasq.
