First published: Wed Apr 24 2024(Updated: )
USN-6657-1 fixed several vulnerabilities in Dnsmasq. This update provides the corresponding update for Ubuntu 16.04 LTS and Ubuntu 18.04 LTS. Original advisory details: Elias Heftrig, Haya Schulmann, Niklas Vogel, and Michael Waidner discovered that Dnsmasq icorrectly handled validating DNSSEC messages. A remote attacker could possibly use this issue to cause Dnsmasq to consume resources, leading to a denial of service. (CVE-2023-50387) It was discovered that Dnsmasq incorrectly handled preparing an NSEC3 closest encloser proof. A remote attacker could possibly use this issue to cause Dnsmasq to consume resources, leading to a denial of service. (CVE-2023-50868) It was discovered that Dnsmasq incorrectly set the maximum EDNS.0 UDP packet size as required by DNS Flag Day 2020. This issue only affected Ubuntu 23.10. (CVE-2023-28450)
Affected Software | Affected Version | How to fix |
---|---|---|
All of | ||
ubuntu/dnsmasq-base | <2.90-0ubuntu0.18.04.1+esm1 | 2.90-0ubuntu0.18.04.1+esm1 |
Ubuntu Ubuntu | =18.04 | |
All of | ||
ubuntu/dnsmasq-base | <2.90-0ubuntu0.16.04.1+esm1 | 2.90-0ubuntu0.16.04.1+esm1 |
Ubuntu Ubuntu | =16.04 |
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(Contains the following vulnerabilities)