Amazon Linux 2023 Security Advisory: ALAS2023-2025-1105
Advisory Released Date: 2025-08-08
Advisory Updated Date: 2025-08-08
Severity:
Important
Issue Overview:
If a `named` caching resolver is configured with `serve-stale-enable` `yes`, and with `stale-answer-client-timeout` set to `0` (the only allowable value other than `disabled`), and if the resolver, in the process of resolving a query, encounters a CNAME chain involving a specific combination of cached or authoritative records, the daemon will abort with an assertion failure.
This issue affects BIND 9 versions 9.20.0 through 9.20.10, 9.21.0 through 9.21.9, and 9.20.9-S1 through 9.20.10-S1. (CVE-2025-40777)
Affected Packages:
bind
Issue Correction:
Run dnf update bind --releasever 2023.8.20250808 or dnf update --advisory ALAS2023-2025-1105 --releasever 2023.8.20250808 to update your system.
More information on how to update your system can be found on this page: Amazon Linux 2023 documentation
New Packages:
aarch64:
bind-utils-debuginfo-9.18.33-1.amzn2023.0.3.aarch64
bind-chroot-9.18.33-1.amzn2023.0.3.aarch64
bind-dnssec-utils-debuginfo-9.18.33-1.amzn2023.0.3.aarch64
bind-debuginfo-9.18.33-1.amzn2023.0.3.aarch64
bind-utils-9.18.33-1.amzn2023.0.3.aarch64
bind-dnssec-utils-9.18.33-1.amzn2023.0.3.aarch64
bind-libs-debuginfo-9.18.33-1.amzn2023.0.3.aarch64
bind-debugsource-9.18.33-1.amzn2023.0.3.aarch64
bind-libs-9.18.33-1.amzn2023.0.3.aarch64
bind-devel-9.18.33-1.amzn2023.0.3.aarch64
bind-9.18.33-1.amzn2023.0.3.aarch64
noarch:
bind-license-9.18.33-1.amzn2023.0.3.noarch
bind-doc-9.18.33-1.amzn2023.0.3.noarch
src:
bind-9.18.33-1.amzn2023.0.3.src
x86_64:
bind-dnssec-utils-debuginfo-9.18.33-1.amzn2023.0.3.x86_64
bind-chroot-9.18.33-1.amzn2023.0.3.x86_64
bind-devel-9.18.33-1.amzn2023.0.3.x86_64
bind-libs-debuginfo-9.18.33-1.amzn2023.0.3.x86_64
bind-utils-9.18.33-1.amzn2023.0.3.x86_64
bind-debuginfo-9.18.33-1.amzn2023.0.3.x86_64
bind-debugsource-9.18.33-1.amzn2023.0.3.x86_64
bind-utils-debuginfo-9.18.33-1.amzn2023.0.3.x86_64
bind-dnssec-utils-9.18.33-1.amzn2023.0.3.x86_64
bind-9.18.33-1.amzn2023.0.3.x86_64
bind-libs-9.18.33-1.amzn2023.0.3.x86_64