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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-6657-2
Posted Apr 25, 2024
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 6657-2 - USN-6657-1 fixed several vulnerabilities in Dnsmasq. This update provides the corresponding update for Ubuntu 16.04 LTS and Ubuntu 18.04 LTS. Elias Heftrig, Haya Schulmann, Niklas Vogel, and Michael Waidner discovered that Dnsmasq incorrectly 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. 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.

tags | advisory, remote, denial of service, udp, vulnerability
systems | linux, ubuntu
advisories | CVE-2023-28450, CVE-2023-50387, CVE-2023-50868
SHA-256 | 1fe74e528f9c677caecbbdfcd678431e4752e4565e8a9eb7cd614192a3dcc6e0
Red Hat Security Advisory 2024-1544-03
Posted Mar 28, 2024
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2024-1544-03 - An update for dnsmasq is now available for Red Hat Enterprise Linux 8.8 Extended Update Support.

tags | advisory
systems | linux, redhat
advisories | CVE-2023-28450
SHA-256 | 8d6947f4e3101dfe04b20bbb3ae830e7dfd57b406038e317ea2a6fc0f87e7bdb
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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