Packages
- unbound - validating, recursive, caching DNS resolver
Details
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.
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.
Update instructions
In general, a standard system update will make all the necessary changes.
Learn more about how to get the fixes.The problem can be corrected by updating your system to the following package versions:
| Ubuntu Release | Package Version | ||
|---|---|---|---|
| 25.04 plucky | libunbound8 – 1.22.0-1ubuntu1.1 | ||
| unbound – 1.22.0-1ubuntu1.1 | |||
| 24.04 noble | libunbound8 – 1.19.2-1ubuntu3.5 | ||
| unbound – 1.19.2-1ubuntu3.5 | |||
| 22.04 jammy | libunbound8 – 1.13.1-1ubuntu5.11 | ||
| unbound – 1.13.1-1ubuntu5.11 | |||
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