unbound: Unbound Cache poisoning

A cache poisoning flaw was found in Unbound. Resolvers supporting EDNS Client Subnet ECS must segregate outgoing queries to accommodate different outgoing ECS information. This issue reopens resolvers to a birthday paradox attack, known as the Rebirthday Attack, which attempts to match the DNS...

Important: unbound

Issue Overview: A multi-vendor cache poisoning vulnerability named 'Rebirthday Attack' has been discovered in caching resolvers that support EDNS Client Subnet ECS. Unbound is also vulnerable when compiled with ECS support, i.e., '--enable-subnet', AND configured to send ECS information along wit...

Important: unbound

Issue Overview: A multi-vendor cache poisoning vulnerability named 'Rebirthday Attack' has been discovered in caching resolvers that support EDNS Client Subnet ECS. Unbound is also vulnerable when compiled with ECS support, i.e., '--enable-subnet', AND configured to send ECS information along wit...

Amazon Linux 2 : unbound (ALASUNBOUND-1.17-2025-005)

The version of unbound installed on the remote host is prior to 1.17.0-2. It is, therefore, affected by a vulnerability as referenced in the ALAS2UNBOUND-1.17-2025-005 advisory. A multi-vendor cache poisoning vulnerability named 'Rebirthday Attack' has been discovered in caching resolvers that...

Amazon Linux 2 : unbound (ALAS-2025-2951)

The version of unbound installed on the remote host is prior to 1.7.3-15. It is, therefore, affected by a vulnerability as referenced in the ALAS2-2025-2951 advisory. A multi-vendor cache poisoning vulnerability named 'Rebirthday Attack' has been discovered in caching resolvers that support EDNS...

unbound: Unbound Cache poisoning

A cache poisoning flaw was found in Unbound. Resolvers supporting EDNS Client Subnet ECS must segregate outgoing queries to accommodate different outgoing ECS information. This issue reopens resolvers to a birthday paradox attack, known as the Rebirthday Attack, which attempts to match the DNS...

Ubuntu 22.04 LTS / 24.04 LTS / 25.04 : Unbound vulnerabilities (USN-7666-1)

The remote Ubuntu 22.04 LTS / 24.04 LTS / 25.04 host has packages installed that are affected by a vulnerability as referenced in the USN-7666-1 advisory. Xiang Li discovered that Unbound incorrectly handled EDNS Client Subnet ECS in certain configurations. A remote attacker could possibly use th...

USN-7666-1: Unbound vulnerabilities

Xiang Li discovered that Unbound incorrectly handled EDNS Client Subnet ECS in certain configurations. A remote attacker could possibly use this issue to perform a cache poisoning attack called Rebirthday Attack...

SUSE CVE-2025-30192

An attacker spoofing answers to ECS enabled requests sent out by the Recursor has a chance of success higher than non-ECS enabled queries. The updated version include various mitigations against spoofing attempts of ECS enabled queries by chaining ECS enabled requests and enforcing stricter...

DEBIAN-CVE-2025-30192

An attacker spoofing answers to ECS enabled requests sent out by the Recursor has a chance of success higher than non-ECS enabled queries. The updated version include various mitigations against spoofing attempts of ECS enabled queries by chaining ECS enabled requests and enforcing stricter...

CVE-2025-30192

An attacker spoofing answers to ECS enabled requests sent out by the Recursor has a chance of success higher than non-ECS enabled queries. The updated version include various mitigations against spoofing attempts of ECS enabled queries by chaining ECS enabled requests and enforcing stricter...

PowerDNS Recursor 安全漏洞

PowerDNS Recursor pdnsrecursor is a domain name resolution server from the Dutch company PowerDNS. A security vulnerability exists in PowerDNS Recursor versions 5.0.10, 5.1.4, and 5.2.2 and above, which stems from the fact that spoofing attempts for ECS-enabled queries have a higher chance of...

CVE-2025-40776

A named caching resolver that is configured to send ECS EDNS Client Subnet options may be vulnerable to a cache-poisoning attack. This issue affects BIND 9 versions 9.11.3-S1 through 9.16.50-S1, 9.18.11-S1 through 9.18.37-S1, and 9.20.9-S1 through 9.20.10-S1...

FreeBSD : unbound -- Cache poisoning via the ECS-enabled Rebirthday Attack (e27ee4fc-cdc9-45a1-8242-09898cdbdc91)

The version of FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the e27ee4fc-cdc9-45a1-8242-09898cdbdc91 advisory. [email protected] reports: A multi-vendor cache poisoning vulnerability named 'Rebirthday Attack' has be...

ISC BIND Cache-Poisoning Vulnerability (CVE-2025-40776, Birthday Attack) - Linux

ISC BIND is prone to a cache-poisoning vulnerability Birthday Attack against Resolvers supporting ECS. SPDX-FileCopyrightText: 2025 Greenbone AG Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective right holders. SPDX-License-Identifier:...

UBUNTU-CVE-2025-5994

A multi-vendor cache poisoning vulnerability named 'Rebirthday Attack' has been discovered in caching resolvers that support EDNS Client Subnet ECS. Unbound is also vulnerable when compiled with ECS support, i.e., '--enable-subnet', AND configured to send ECS information along with queries to...

SUSE CVE-2025-40776

A named caching resolver that is configured to send ECS EDNS Client Subnet options may be vulnerable to a cache-poisoning attack. This issue affects BIND 9 versions 9.11.3-S1 through 9.16.50-S1, 9.18.11-S1 through 9.18.37-S1, and 9.20.9-S1 through 9.20.10-S1...

CVE-2025-5994

A multi-vendor cache poisoning vulnerability named 'Rebirthday Attack' has been discovered in caching resolvers that support EDNS Client Subnet ECS. Unbound is also vulnerable when compiled with ECS support, i.e., '--enable-subnet', AND configured to send ECS information along with queries to...

CVE-2025-5994

A multi-vendor cache poisoning vulnerability named 'Rebirthday Attack' has been discovered in caching resolvers that support EDNS Client Subnet ECS. Unbound is also vulnerable when compiled with ECS support, i.e., '--enable-subnet', AND configured to send ECS information along with queries to...

ALPINE-CVE-2025-5994

A multi-vendor cache poisoning vulnerability named 'Rebirthday Attack' has been discovered in caching resolvers that support EDNS Client Subnet ECS. Unbound is also vulnerable when compiled with ECS support, i.e., '--enable-subnet', AND configured to send ECS information along with queries to...