Important: bind

Issue Overview:

The DNS message parsing code in named includes a section whose computational complexity is overly high. It does not cause problems for typical DNS traffic, but crafted queries and responses may cause excessive CPU load on the affected named instance by exploiting this flaw. This issue affects both authoritative servers and recursive resolvers.
This issue affects BIND 9 versions 9.0.0 through 9.16.45, 9.18.0 through 9.18.21, 9.19.0 through 9.19.19, 9.9.3-S1 through 9.11.37-S1, 9.16.8-S1 through 9.16.45-S1, and 9.18.11-S1 through 9.18.21-S1. (CVE-2023-4408)

Affected Packages:

bind

Note:

This advisory is applicable to Amazon Linux 2 (AL2) Core repository. Visit this FAQ section for the difference between AL2 Core and AL2 Extras advisories.

Issue Correction:
Run yum update bind to update your system.

New Packages:

aarch64:  
    bind-9.11.4-26.P2.amzn2.13.8.aarch64  
    bind-pkcs11-9.11.4-26.P2.amzn2.13.8.aarch64  
    bind-pkcs11-utils-9.11.4-26.P2.amzn2.13.8.aarch64  
    bind-pkcs11-libs-9.11.4-26.P2.amzn2.13.8.aarch64  
    bind-pkcs11-devel-9.11.4-26.P2.amzn2.13.8.aarch64  
    bind-sdb-9.11.4-26.P2.amzn2.13.8.aarch64  
    bind-libs-lite-9.11.4-26.P2.amzn2.13.8.aarch64  
    bind-libs-9.11.4-26.P2.amzn2.13.8.aarch64  
    bind-utils-9.11.4-26.P2.amzn2.13.8.aarch64  
    bind-devel-9.11.4-26.P2.amzn2.13.8.aarch64  
    bind-lite-devel-9.11.4-26.P2.amzn2.13.8.aarch64  
    bind-chroot-9.11.4-26.P2.amzn2.13.8.aarch64  
    bind-sdb-chroot-9.11.4-26.P2.amzn2.13.8.aarch64  
    bind-export-libs-9.11.4-26.P2.amzn2.13.8.aarch64  
    bind-export-devel-9.11.4-26.P2.amzn2.13.8.aarch64  
    bind-debuginfo-9.11.4-26.P2.amzn2.13.8.aarch64  
  
i686:  
    bind-9.11.4-26.P2.amzn2.13.8.i686  
    bind-pkcs11-9.11.4-26.P2.amzn2.13.8.i686  
    bind-pkcs11-utils-9.11.4-26.P2.amzn2.13.8.i686  
    bind-pkcs11-libs-9.11.4-26.P2.amzn2.13.8.i686  
    bind-pkcs11-devel-9.11.4-26.P2.amzn2.13.8.i686  
    bind-sdb-9.11.4-26.P2.amzn2.13.8.i686  
    bind-libs-lite-9.11.4-26.P2.amzn2.13.8.i686  
    bind-libs-9.11.4-26.P2.amzn2.13.8.i686  
    bind-utils-9.11.4-26.P2.amzn2.13.8.i686  
    bind-devel-9.11.4-26.P2.amzn2.13.8.i686  
    bind-lite-devel-9.11.4-26.P2.amzn2.13.8.i686  
    bind-chroot-9.11.4-26.P2.amzn2.13.8.i686  
    bind-sdb-chroot-9.11.4-26.P2.amzn2.13.8.i686  
    bind-export-libs-9.11.4-26.P2.amzn2.13.8.i686  
    bind-export-devel-9.11.4-26.P2.amzn2.13.8.i686  
    bind-debuginfo-9.11.4-26.P2.amzn2.13.8.i686  
  
noarch:  
    bind-license-9.11.4-26.P2.amzn2.13.8.noarch  
  
src:  
    bind-9.11.4-26.P2.amzn2.13.8.src  
  
x86_64:  
    bind-9.11.4-26.P2.amzn2.13.8.x86_64  
    bind-pkcs11-9.11.4-26.P2.amzn2.13.8.x86_64  
    bind-pkcs11-utils-9.11.4-26.P2.amzn2.13.8.x86_64  
    bind-pkcs11-libs-9.11.4-26.P2.amzn2.13.8.x86_64  
    bind-pkcs11-devel-9.11.4-26.P2.amzn2.13.8.x86_64  
    bind-sdb-9.11.4-26.P2.amzn2.13.8.x86_64  
    bind-libs-lite-9.11.4-26.P2.amzn2.13.8.x86_64  
    bind-libs-9.11.4-26.P2.amzn2.13.8.x86_64  
    bind-utils-9.11.4-26.P2.amzn2.13.8.x86_64  
    bind-devel-9.11.4-26.P2.amzn2.13.8.x86_64  
    bind-lite-devel-9.11.4-26.P2.amzn2.13.8.x86_64  
    bind-chroot-9.11.4-26.P2.amzn2.13.8.x86_64  
    bind-sdb-chroot-9.11.4-26.P2.amzn2.13.8.x86_64  
    bind-export-libs-9.11.4-26.P2.amzn2.13.8.x86_64  
    bind-export-devel-9.11.4-26.P2.amzn2.13.8.x86_64  
    bind-debuginfo-9.11.4-26.P2.amzn2.13.8.x86_64  

Additional References

Red Hat: CVE-2023-4408

Mitre: CVE-2023-4408