Amazon Linux 2023 Security Advisory: ALAS2023-2025-1315
Advisory Released Date: 2025-12-08
Advisory Updated Date: 2025-12-08
NLnet Labs Unbound up to and including version 1.24.0 is vulnerable to possible domain hijack attacks. Promiscuous NS RRSets that complement positive DNS replies in the authority section can be used to trick resolvers to update their delegation information for the zone. Usually these RRSets are used to update the resolver's knowledge of the zone's name servers. A malicious actor can exploit the possible poisonous effect by injecting NS RRSets (and possibly their respective address records) in a reply. This could be done for example by trying to spoof a packet or fragmentation attacks. Unbound would then proceed to update the NS RRSet data it already has since the new data has enough trust for it, i.e., in-zone data for the delegation point. Unbound 1.24.1 includes a fix that scrubs unsolicited NS RRSets (and their respective address records) from replies mitigating the possible poison effect. (CVE-2025-11411)
Affected Packages:
unbound
Issue Correction:
Run dnf update unbound --releasever 2023.9.20251208 or dnf update --advisory ALAS2023-2025-1315 --releasever 2023.9.20251208 to update your system.
More information on how to update your system can be found on this page: Amazon Linux 2023 documentation
aarch64:
unbound-libs-debuginfo-1.17.1-1.amzn2023.0.10.aarch64
unbound-debuginfo-1.17.1-1.amzn2023.0.10.aarch64
unbound-devel-1.17.1-1.amzn2023.0.10.aarch64
unbound-anchor-1.17.1-1.amzn2023.0.10.aarch64
unbound-debugsource-1.17.1-1.amzn2023.0.10.aarch64
python3-unbound-debuginfo-1.17.1-1.amzn2023.0.10.aarch64
unbound-utils-debuginfo-1.17.1-1.amzn2023.0.10.aarch64
unbound-anchor-debuginfo-1.17.1-1.amzn2023.0.10.aarch64
python3-unbound-1.17.1-1.amzn2023.0.10.aarch64
unbound-utils-1.17.1-1.amzn2023.0.10.aarch64
unbound-1.17.1-1.amzn2023.0.10.aarch64
unbound-libs-1.17.1-1.amzn2023.0.10.aarch64
src:
unbound-1.17.1-1.amzn2023.0.10.src
x86_64:
unbound-debuginfo-1.17.1-1.amzn2023.0.10.x86_64
unbound-anchor-debuginfo-1.17.1-1.amzn2023.0.10.x86_64
python3-unbound-debuginfo-1.17.1-1.amzn2023.0.10.x86_64
unbound-libs-debuginfo-1.17.1-1.amzn2023.0.10.x86_64
unbound-utils-debuginfo-1.17.1-1.amzn2023.0.10.x86_64
unbound-debugsource-1.17.1-1.amzn2023.0.10.x86_64
unbound-devel-1.17.1-1.amzn2023.0.10.x86_64
unbound-utils-1.17.1-1.amzn2023.0.10.x86_64
unbound-anchor-1.17.1-1.amzn2023.0.10.x86_64
unbound-1.17.1-1.amzn2023.0.10.x86_64
unbound-libs-1.17.1-1.amzn2023.0.10.x86_64
python3-unbound-1.17.1-1.amzn2023.0.10.x86_64