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CVE-2023-28450

Status Candidate

Overview

An issue was discovered in Dnsmasq before 2.90. The default maximum EDNS.0 UDP packet size was set to 4096 but should be 1232 because of DNS Flag Day 2020.

Related Files

Ubuntu Security Notice USN-6657-1
Posted Feb 27, 2024
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 6657-1 - 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. 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.

tags | advisory, remote, denial of service
systems | linux, ubuntu
advisories | CVE-2023-28450, CVE-2023-50387, CVE-2023-50868
SHA-256 | 46f1a09bc8e779b0877ec272386957a7de5ad50e209a3024756ed199c3923006
Red Hat Security Advisory 2023-7046-01
Posted Nov 15, 2023
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2023-7046-01 - An update for dnsmasq is now available for Red Hat Enterprise Linux 8.

tags | advisory
systems | linux, redhat
advisories | CVE-2023-28450
SHA-256 | d945f08dccf2d8399cb918a98d62d43e71b8c2523e24aa98eb344420ebd6432c
Red Hat Security Advisory 2023-6524-01
Posted Nov 13, 2023
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2023-6524-01 - An update for dnsmasq is now available for Red Hat Enterprise Linux 9.

tags | advisory
systems | linux, redhat
advisories | CVE-2023-28450
SHA-256 | 85aa36871c42e94f02d77fbb022ecab669196ab6b238a6b3b38d8eb31110c8f4
Ubuntu Security Notice USN-6034-1
Posted Apr 20, 2023
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 6034-1 - It was discovered that Dnsmasq was sending large DNS messages over UDP, possibly causing transmission failures due to IP fragmentation. This update lowers the default maximum size of DNS messages to improve transmission reliability over UDP.

tags | advisory, udp
systems | linux, ubuntu
advisories | CVE-2023-28450
SHA-256 | c4992069af8cbbce8803ac455250932b08babf1c097f9d0ca6ff6c63035da835
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