ELA-1567-2 unbound security update

cache poisoning vulnerability

2025-12-01
Packageunbound
Version1.9.0-2+deb10u8 (buster)
Related CVEs CVE-2025-11411


Yuxiao Wu, Yunyi Zhang, Baojun Liu and Haixin Duan discovered that the initial fix for CVE-2025-11411 as applied in ELA 1567-1 did not fully fix the vulnerability. Updated packages correcting this issue are now available.

Additionally, this update includes a fix for potential amplification DDoS attacks due to improperly following cleared RD flags.



For Debian 10 buster, these problems have been fixed in version 1.9.0-2+deb10u8.

We recommend that you upgrade your unbound packages.

Further information about Extended LTS security advisories can be found in the dedicated section of our website.