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Ubuntu Security Notice USN-6657-1
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.
==========================================================================Ubuntu Security Notice USN-6657-1February 26, 2024dnsmasq vulnerabilities==========================================================================A security issue affects these releases of Ubuntu and its derivatives:- Ubuntu 23.10- Ubuntu 22.04 LTS- Ubuntu 20.04 LTSSummary:Several security issues were fixed in Dnsmasq.Software Description:- dnsmasq: Small caching DNS proxy and DHCP/TFTP serverDetails:Elias Heftrig, Haya Schulmann, Niklas Vogel, and Michael Waidner discoveredthat Dnsmasq icorrectly handled validating DNSSEC messages. A remoteattacker could possibly use this issue to cause Dnsmasq to consumeresources, leading to a denial of service. (CVE-2023-50387)It was discovered that Dnsmasq incorrectly handled preparing an NSEC3closest encloser proof. A remote attacker could possibly use this issue tocause Dnsmasq to consume resources, leading to a denial of service.(CVE-2023-50868)It was discovered that Dnsmasq incorrectly set the maximum EDNS.0 UDPpacket size as required by DNS Flag Day 2020. This issue only affectedUbuntu 23.10. (CVE-2023-28450)Update instructions:The problem can be corrected by updating your system to the followingpackage versions:Ubuntu 23.10: dnsmasq-base 2.90-0ubuntu0.23.10.1Ubuntu 22.04 LTS: dnsmasq-base 2.90-0ubuntu0.22.04.1Ubuntu 20.04 LTS: dnsmasq-base 2.90-0ubuntu0.20.04.1This update uses a new upstream release, which includes additional bugfixes. After a standard system update you need to reboot your computer tomake all the necessary changes.References: https://ubuntu.com/security/notices/USN-6657-1 CVE-2023-28450, CVE-2023-50387, CVE-2023-50868Package Information: https://launchpad.net/ubuntu/+source/dnsmasq/2.90-0ubuntu0.23.10.1 https://launchpad.net/ubuntu/+source/dnsmasq/2.90-0ubuntu0.22.04.1 https://launchpad.net/ubuntu/+source/dnsmasq/2.90-0ubuntu0.20.04.1Related news
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Red Hat Security Advisory 2024-3877-03 - An update for dnsmasq is now available for Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support, Red Hat Enterprise Linux 8.4 Telecommunications Update Service, and Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions.
Red Hat Security Advisory 2024-2821-03 - An update for bind and dhcp is now available for Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support, Red Hat Enterprise Linux 8.4 Telecommunications Update Service, and Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions.
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.
Red Hat Security Advisory 2024-1803-03 - Updates for bind and bind-dyndb-ldap are now available for Red Hat Enterprise Linux 9.2 Extended Update Support.
Red Hat Security Advisory 2024-1801-03 - An update for unbound is now available for Red Hat Enterprise Linux 9.0 Extended Update Support.
Red Hat Security Advisory 2024-1800-03 - Updates for bind and bind-dyndb-ldap are now available for Red Hat Enterprise Linux 9.0 Extended Update Support.
Red Hat Security Advisory 2024-1781-03 - An update for bind9.16 is now available for Red Hat Enterprise Linux 8.
Red Hat Security Advisory 2024-1648-03 - An update for bind9.16 is now available for Red Hat Enterprise Linux 8.8 Extended Update Support.
Red Hat Security Advisory 2024-1647-03 - An update for bind9.16 is now available for Red Hat Enterprise Linux 8.6 Extended Update Support.
Red Hat Security Advisory 2024-1545-03 - An update for dnsmasq is now available for Red Hat Enterprise Linux 8.6 Extended Update Support. Issues addressed include a use-after-free vulnerability.
Red Hat Security Advisory 2024-1544-03 - An update for dnsmasq is now available for Red Hat Enterprise Linux 8.8 Extended Update Support.
Red Hat Security Advisory 2024-1543-03 - An update for dnsmasq is now available for Red Hat Enterprise Linux 9.0 Extended Update Support.
Red Hat Security Advisory 2024-1522-03 - An update for dnsmasq is now available for Red Hat Enterprise Linux 9.2 Extended Update Support.
Red Hat Security Advisory 2024-1335-03 - An update for dnsmasq is now available for Red Hat Enterprise Linux 8.
Red Hat Security Advisory 2024-1334-03 - An update for dnsmasq is now available for Red Hat Enterprise Linux 9.
Hello everyone! In this episode, I will talk about the February updates of my open source projects, also about projects at my main job at Positive Technologies and interesting vulnerabilities. Alternative video link (for Russia): https://vk.com/video-149273431_456239140 Let’s start with my open source projects. Vulremi A simple vulnerability remediation utility, Vulremi, now has a logo and […]
Ubuntu Security Notice 6665-1 - Elias Heftrig, Haya Schulmann, Niklas Vogel, and Michael Waidner discovered that Unbound incorrectly handled validating DNSSEC messages. A remote attacker could possibly use this issue to cause Unbound to consume resources, leading to a denial of service. It was discovered that Unbound incorrectly handled preparing an NSEC3 closest encloser proof. A remote attacker could possibly use this issue to cause Unbound to consume resources, leading to a denial of service.
Debian Linux Security Advisory 5633-1 - It was discovered that malformed DNSSEC records within a DNS zone could result in denial of service against Knot Resolver, a caching, DNSSEC- validating DNS resolver.
Red Hat Security Advisory 2024-0982-03 - An update for unbound is now available for Red Hat Enterprise Linux 8.8 Extended Update Support.
Red Hat Security Advisory 2024-0981-03 - An update for unbound is now available for Red Hat Enterprise Linux 9.2 Extended Update Support.
Ubuntu Security Notice 6642-1 - Shoham Danino, Anat Bremler-Barr, Yehuda Afek, and Yuval Shavitt discovered that Bind incorrectly handled parsing large DNS messages. A remote attacker could possibly use this issue to cause Bind to consume resources, leading to a denial of service. Elias Heftrig, Haya Schulmann, Niklas Vogel, and Michael Waidner discovered that Bind incorrectly handled validating DNSSEC messages. A remote attacker could possibly use this issue to cause Bind to consume resources, leading to a denial of service.
Ubuntu Security Notice 6642-1 - Shoham Danino, Anat Bremler-Barr, Yehuda Afek, and Yuval Shavitt discovered that Bind incorrectly handled parsing large DNS messages. A remote attacker could possibly use this issue to cause Bind to consume resources, leading to a denial of service. Elias Heftrig, Haya Schulmann, Niklas Vogel, and Michael Waidner discovered that Bind incorrectly handled validating DNSSEC messages. A remote attacker could possibly use this issue to cause Bind to consume resources, leading to a denial of service.
Debian Linux Security Advisory 5626-1 - It was discovered that malformed DNSSEC records within a DNS zone could result in denial of service against PDNS Recursor, a resolving name server.
Debian Linux Security Advisory 5626-1 - It was discovered that malformed DNSSEC records within a DNS zone could result in denial of service against PDNS Recursor, a resolving name server.
Debian Linux Security Advisory 5621-1 - Several vulnerabilities were discovered in BIND, a DNS server implementation, which may result in denial of service.
Debian Linux Security Advisory 5621-1 - Several vulnerabilities were discovered in BIND, a DNS server implementation, which may result in denial of service.
Debian Linux Security Advisory 5620-1 - Two vulnerabilities were discovered in unbound, a validating, recursive, caching DNS resolver. Specially crafted DNSSEC answers could lead unbound down a very CPU intensive and time costly DNSSEC (CVE-2023-50387) or NSEC3 hash (CVE-2023-50868) validation path, resulting in denial of service.
Debian Linux Security Advisory 5620-1 - Two vulnerabilities were discovered in unbound, a validating, recursive, caching DNS resolver. Specially crafted DNSSEC answers could lead unbound down a very CPU intensive and time costly DNSSEC (CVE-2023-50387) or NSEC3 hash (CVE-2023-50868) validation path, resulting in denial of service.
Ubuntu Security Notice 6633-1 - Shoham Danino, Anat Bremler-Barr, Yehuda Afek, and Yuval Shavitt discovered that Bind incorrectly handled parsing large DNS messages. A remote attacker could possibly use this issue to cause Bind to consume resources, leading to a denial of service. Elias Heftrig, Haya Schulmann, Niklas Vogel, and Michael Waidner discovered that Bind incorrectly handled validating DNSSEC messages. A remote attacker could possibly use this issue to cause Bind to consume resources, leading to a denial of service.
Ubuntu Security Notice 6633-1 - Shoham Danino, Anat Bremler-Barr, Yehuda Afek, and Yuval Shavitt discovered that Bind incorrectly handled parsing large DNS messages. A remote attacker could possibly use this issue to cause Bind to consume resources, leading to a denial of service. Elias Heftrig, Haya Schulmann, Niklas Vogel, and Michael Waidner discovered that Bind incorrectly handled validating DNSSEC messages. A remote attacker could possibly use this issue to cause Bind to consume resources, leading to a denial of service.
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.
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.