> CVE-2025-5994

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PUBLISHED
2025-07-16 15:15
MODIFIED
2025-07-17 21:15
EPSS (Prob. Exploit)
0.22%
Top 87.6%
DATA SOURCES:
NVD 🔗 2025-10-18 RED HAT 🔗 2025-10-18 CVE PROJECT 🔗 2026-01-19 FIRST EPSS 🔗 2026-11-08 OSV 🔗 2026-11-08 MSRC 🔗 2026-06-01

> DESCRIPTION

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 upstream name servers, i.e., at least one of the 'send-client-subnet', 'client-subnet-zone' or 'client-subnet-always-forward' options is used. Resolvers supporting ECS need to segregate outgoing queries to accommodate for different outgoing ECS information. This re-opens up resolvers to a birthday paradox attack (Rebirthday Attack) that tries to match the DNS transaction ID in order to cache non-ECS poisonous replies.

> AFFECTED_PRODUCTS

Red Hat - Red Hat Enterprise Linux 10
Version: 1.20.0
Red Hat - Red Hat Enterprise Linux 8
Version: 1.16.2
Red Hat - Red Hat Enterprise Linux 9
Version: 1.16.2
Red Hat - Red Hat Enterprise Linux 9.4 Extended Update Support
Version: 1.16.2
Red Hat - Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
Version: 1.7.3
Red Hat - Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support
Version: 1.7.3
Red Hat - Red Hat Enterprise Linux 8.6 Telecommunications Update Service
Version: 1.7.3
Red Hat - Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions
Version: 1.7.3
Red Hat - Red Hat Enterprise Linux 8.2 Advanced Update Support
Version: 1.7.3
Red Hat - Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On
Version: 1.7.3
Red Hat - Red Hat Enterprise Linux 8.8 Telecommunications Update Service
Version: 1.16.2
Red Hat - Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions
Version: 1.16.2
Red Hat - Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions
Version: 1.13.1
Red Hat - Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions
Version: 1.16.2

> RED HAT SECURITY ADVISORIES

Red Hat Security Advisory: unbound security update
An update for unbound is now available for Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support, Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions, and Red Hat Enterprise...
Red Hat Security Advisory: unbound security update
An update for unbound is now available for Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support and Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On. Red Hat Pro...
Red Hat Security Advisory: unbound security update
An update for unbound is now available for Red Hat Enterprise Linux 8.2 Advanced Update Support. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vuln...
Red Hat Security Advisory: unbound security update
An update for unbound is now available for Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions and Red Hat Enterprise Linux 8.8 Telecommunications Update Service. Red Hat Product Security...
Red Hat Security Advisory: unbound security update
An update for unbound is now available for Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions. Red Hat Product Security has rated this update as having a security impact of Important. A C...
Red Hat Security Advisory: unbound security update
An update for unbound is now available for Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions. Red Hat Product Security has rated this update as having a security impact of Important. A C...
Red Hat Security Advisory: unbound security update
An update for unbound is now available for Red Hat Enterprise Linux 9.4 Extended Update Support. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vuln...
Red Hat Security Advisory: unbound security update
An update for unbound is now available for Red Hat Enterprise Linux 10. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System...
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 (...
Red Hat Security Advisory: unbound security update
An update for unbound is now available for Red Hat Enterprise Linux 9. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (...
Red Hat Security Advisory: OpenShift Container Platform 4.19.17 bug fix and security update
Red Hat OpenShift Container Platform release 4.19.17 is now available with updates to packages and images that fix several bugs and add enhancements. This release includes a security update for Red H...
Red Hat Security Advisory: OpenShift Container Platform 4.17.42 bug fix and security update
Red Hat OpenShift Container Platform release 4.17.42 is now available with updates to packages and images that fix several bugs and add enhancements. This release includes a security update for Red...
Red Hat Security Advisory: OpenShift Container Platform 4.20.0 bug fix and security update
Red Hat OpenShift Container Platform release 4.20.0 is now available with updates to packages and images that fix several bugs and add enhancements. This release includes a security update for Red Hat...
Red Hat Security Advisory: OpenShift Container Platform 4.13.61 bug fix and security update
Red Hat OpenShift Container Platform release 4.13.61 is now available with updates to packages and images that fix several bugs and add enhancements. This release includes a security update for Red H...
Red Hat Security Advisory: OpenShift Container Platform 4.18.27 bug fix and security update
Red Hat OpenShift Container Platform release 4.18.27 is now available with updates to packages and images that fix several bugs and add enhancements. This release includes a security update for Red H...
Red Hat Security Advisory: OpenShift Container Platform 4.14.58 bug fix and security update
Red Hat OpenShift Container Platform release 4.14.58 is now available with updates to packages and images that fix several bugs and add enhancements. This release includes a security update for Red...
Red Hat Security Advisory: OpenShift Container Platform 4.12.82 bug fix and security update
Red Hat OpenShift Container Platform release 4.12.82 is now available with updates to packages and images that fix several bugs and add enhancements. This release includes a security update for Red H...
Red Hat Security Advisory: OpenShift Container Platform 4.16.70 bug fix and security update
Red Hat OpenShift Container Platform release 4.16.70 is now available with updates to packages and images that fix several bugs and add enhancements. This release includes a security update for Red H...
Red Hat Security Advisory: OpenShift Container Platform 4.15.69 bug fix and security update
Red Hat OpenShift Container Platform release 4.15.69 is now available with updates to packages and images that fix several bugs and add enhancements. This release includes a security update for Red H...

> RED HAT SEVERITY ASSESSMENT

THREAT SEVERITY
Important

> OSV (GOOGLE OPEN SOURCE VULNERABILITIES)

> HISTORIQUE DES MODIFICATIONS

Première apparition
16/07/2025 15:15
Source: NVD
📊 ENRICHISSEMENT 18/10/2025 15:06
CVEPROJECT
Champ modifié: CVE Project
Ancienne valeur:
Non
Nouvelle valeur:
Oui
📊 ENRICHISSEMENT 18/10/2025 12:10
REDHAT
Champ modifié: Sévérité Red Hat
Ancienne valeur:
N/A
Nouvelle valeur:
{ "threat_severity": "Important", "severity_scale": null }
📊 ENRICHISSEMENT 18/10/2025 12:10
REDHAT
Champ modifié: Red Hat
Ancienne valeur:
Non
Nouvelle valeur:
Oui
Total des modifications: 3 Dernière mise à jour: 1 year ago
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