ALPINE-CVE-2025-5994
ALPINE-CVE-2025-5994
This page contains facts from public vulnerability sources. Check the original advisory before updating.
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.
CVSS 8.7 · High · Fix available
- Published
- Updated
Stack: system
Affected products and versions
unbound Alpine:v3.19
- Affected ranges
- ECOSYSTEM: < 1.20.0-r2
Update to 1.20.0-r2
unbound Alpine:v3.20
- Affected ranges
- ECOSYSTEM: < 1.20.0-r2
Update to 1.20.0-r2
unbound Alpine:v3.21
- Affected ranges
- ECOSYSTEM: < 1.22.0-r1
Update to 1.22.0-r1
unbound Alpine:v3.22
- Affected ranges
- ECOSYSTEM: < 1.23.1-r0
Update to 1.23.1-r0
unbound Alpine:v3.23
- Affected ranges
- ECOSYSTEM: < 1.23.1-r0
Update to 1.23.1-r0
unbound Alpine:v3.24
- Affected ranges
- ECOSYSTEM: < 1.23.1-r0
Update to 1.23.1-r0