bind9: Preparing an NSEC3 closest encloser proof can exhaust CPU resources

A flaw was found in bind9. By flooding a DNSSEC resolver with responses coming from a DNSEC-signed zone using NSEC3, an attacker can lead the targeted resolver to a CPU exhaustion, further leading to a Denial of Service on the targeted host. This vulnerability applies only for systems where DNSSE...

Important: Red Hat Security Advisory: unbound security update

An update for unbound is now available for Red Hat Enterprise Linux 8.8 Extended Update Support. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available for...

RHEL 8 : unbound (RHSA-2024:0982)

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2024:0982 advisory. The unbound packages provide a validating, recursive, and caching DNS or DNSSEC resolver. Security Fixes: bind9: KeyTrap - Extreme CPU...

USN-6657-1 dnsmasq vulnerabilities

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...

USN-6657-1: Dnsmasq vulnerabilities

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...

Important: Red Hat Security Advisory: unbound security update

An update for unbound is now available for Red Hat Enterprise Linux 8. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available for each vulnerability from t...

RHEL 9 : unbound (RHSA-2024:0977)

The remote Redhat Enterprise Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2024:0977 advisory. The unbound packages provide a validating, recursive, and caching DNS or DNSSEC resolver. Security Fixes: bind9: KeyTrap - Extreme CPU...

ALSA-2024:0965 Important: unbound security update

The unbound packages provide a validating, recursive, and caching DNS or DNSSEC resolver. Security Fixes: bind9: KeyTrap - Extreme CPU consumption in DNSSEC validator CVE-2023-50387 bind9: Preparing an NSEC3 closest encloser proof can exhaust CPU resources CVE-2023-50868 For more details about th...

CentOS 8 : unbound (CESA-2024:0965)

The remote CentOS Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the CESA-2024:0965 advisory. - Certain DNSSEC aspects of the DNS protocol in RFC 4033, 4034, 4035, 6840, and related RFCs allow remote attackers to cause a denial of service CPU...

USN-6642-1 bind9 vulnerabilities

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. CVE-2023-4408 Elias Heftrig, Haya Schulmann,...

Pi-hole FTLDNS < 5.25 Multiple DoS Vulnerabilities (KeyTrap)

Pi-hole FTLDNS is prone to multiple denial of service DoS vulnerabilities. SPDX-FileCopyrightText: 2024 Greenbone AG Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective right holders. SPDX-License-Identifier: GPL-2.0-only CPE =...

Fedora 39 : dnsmasq (2024-e24211eff0)

The remote Fedora 39 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2024-e24211eff0 advisory. https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2024q1/017430.html Tenable has extracted the preceding description block directly from the...

Updated dnsmasq packages fix security vulnerabilities

This updated dnsmasq package fixes security issues: Certain DNSSEC aspects of the DNS protocol allow a remote attacker to trigger a denial of service via extreme consumption of resource caused by DNSSEC query or response: - KeyTrap - Extreme CPU consumption in DNSSEC validator. CVE-2023-50387 -...

Fedora 39 : unbound (2024-2e26eccfcb)

The remote Fedora 39 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2024-2e26eccfcb advisory. - https://nlnetlabs.nl/projects/unbound/security-advisories/ - Secure again control channel. Tenable has extracted the preceding description block...

Unbound DNS Resolver < 1.19.1 Multiple DoS Vulnerabilities (KeyTrap)

Unbound DNS Resolver is prone to multiple denial of service DoS vulnerabilities. SPDX-FileCopyrightText: 2024 Greenbone AG Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective right holders. SPDX-License-Identifier: GPL-2.0-only CPE =...

FreeBSD : powerdns-recursor -- Multiple Vulnerabilities (e15ba624-cca8-11ee-84ca-b42e991fc52e)

The version of FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by multiple vulnerabilities as referenced in the e15ba624-cca8-11ee-84ca-b42e991fc52e advisory. - Certain DNSSEC aspects of the DNS protocol in RFC 4033, 4034, 4035, 6840, and related RFCs...

MGASA-2024-0038 Updated bind packages fix security vulnerabilities

The updated packages fix security vulnerabilities: Parsing large DNS messages may cause excessive CPU load. CVE-2023-4408 Querying RFC 1918 reverse zones may cause an assertion failure when "nxdomain-redirect" is enabled. CVE-2023-5517 Enabling both DNS64 and serve-stale may cause an assertion...

Updated bind packages fix security vulnerabilities

The updated packages fix security vulnerabilities: Parsing large DNS messages may cause excessive CPU load. CVE-2023-4408 Querying RFC 1918 reverse zones may cause an assertion failure when "nxdomain-redirect" is enabled. CVE-2023-5517 Enabling both DNS64 and serve-stale may cause an assertion...

FreeBSD : DNSSEC validators -- denial-of-service/CPU exhaustion from KeyTrap and NSEC3 vulnerabilities (21a854cc-cac1-11ee-b7a7-353f1e043d9a)

The version of FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by multiple vulnerabilities as referenced in the 21a854cc-cac1-11ee-b7a7-353f1e043d9a advisory. - Certain DNSSEC aspects of the DNS protocol in RFC 4035 and related RFCs allow remote attacke...

CVE-2023-50868

The Closest Encloser Proof aspect of the DNS protocol in RFC 5155 when RFC 9276 guidance is skipped allows remote attackers to cause a denial of service CPU consumption for SHA-1 computations via DNSSEC responses in a random subdomain attack, aka the "NSEC3" issue. The RFC 5155 specification...