Sending a flood of dynamic DNS updates may cause `named` to allocate large amounts of memory. This, in turn, may cause `named` to exit due to a lack of free memory. We are not aware of any cases where this has been exploited.
Memory is allocated prior to the checking of access permissions (ACLs) and is retained during the processing of a dynamic update from a client whose access credentials are accepted. Memory allocated to clients that are not permitted to send updates is released immediately upon rejection. The scope of this vulnerability is limited therefore to trusted clients who are permitted to make dynamic zone changes.
If a dynamic update is REFUSED, memory will be released again very quickly. Therefore it is only likely to be possible to degrade or stop `named` by sending a flood of unaccepted dynamic updates comparable in magnitude to a query flood intended to achieve the same detrimental outcome.
BIND 9.11 and earlier branches are also affected, but through exhaustion of internal resources rather than memory constraints. This may reduce performance but should not be a significant problem for most servers. Therefore we don't intend to address this for BIND versions prior to BIND 9.16. This issue affects BIND 9 versions 9.16.0 through 9.16.36, 9.18.0 through 9.18.10, 9.19.0 through 9.19.8, and 9.16.8-S1 through 9.16.36-S1.
CVSS Details
- CVSS 3.1 Base Score: 7.5
- CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade bind9.16-develUpgrade bind-pkcs11-libsUpgrade bind9.16-utilsUpgrade bind9.16Upgrade bind-pkcs11-develUpgrade bind-lite-develUpgrade bind-utilsUpgrade bind9.16-licenseUpgrade bind9.16-docUpgrade python3-bindUpgrade bind-sdb-chrootUpgrade bind9.16-dnssec-utilsUpgrade bind-docUpgrade bind-pkcs11-utilsUpgrade bind-dnssec-docUpgrade bind-pkcs11Upgrade bind-dnssec-utilsUpgrade bind-chrootUpgrade bind9.16-chrootUpgrade python3-bind9.16Upgrade bind-export-develUpgrade bind-sdbUpgrade bindUpgrade bind9.16-libsUpgrade bind-develUpgrade bind-licenseUpgrade bind-export-libsUpgrade bind-libs-liteUpgrade bind-libs | May 15, 2023 | Jan 26, 2023 |
| Alpine Linux | — | Upgrade bind | Aug 22, 2024 | Jan 25, 2023 |
| Amazon Linux Ami 2 | — | Upgrade bind-pkcs11-libsUpgrade bind-utilsUpgrade bind-export-libsUpgrade bind-licenseUpgrade bind-pkcs11-develUpgrade bind-pkcs11Upgrade bind-sdb-chrootUpgrade bind-sdbUpgrade bind-develUpgrade bindUpgrade bind-libsUpgrade bind-export-develUpgrade bind-libs-liteUpgrade bind-debuginfoUpgrade bind-lite-develUpgrade bind-pkcs11-utilsUpgrade bind-chroot | Jan 10, 2025 | Jan 26, 2023 |
| Amazon_linux_2023 | — | Upgrade bind-develUpgrade bind-debugsourceUpgrade bind-dlz-sqlite3-debuginfoUpgrade bindUpgrade bind-dlz-mysqlUpgrade bind-dnssec-utils-debuginfoUpgrade bind-licenseUpgrade bind-pkcs11Upgrade bind-dlz-ldap-debuginfoUpgrade python3-bindUpgrade bind-dlz-ldapUpgrade bind-pkcs11-develUpgrade bind-dlz-mysql-debuginfoUpgrade bind-dnssec-utilsUpgrade bind-libs-debuginfoUpgrade bind-dlz-filesystem-debuginfoUpgrade bind-utilsUpgrade bind-dlz-sqlite3Upgrade bind-dnssec-docUpgrade bind-debuginfoUpgrade bind-chrootUpgrade bind-pkcs11-debuginfoUpgrade bind-pkcs11-libs-debuginfoUpgrade bind-pkcs11-utilsUpgrade bind-dlz-filesystemUpgrade bind-libsUpgrade bind-pkcs11-utils-debuginfoUpgrade bind-pkcs11-libsUpgrade bind-utils-debuginfo | Feb 17, 2025 | Jan 25, 2023 |
| Centos_linux | — | Upgrade bind-develUpgrade python3-bindUpgrade bind9.16-dnssec-utilsUpgrade bind-libs-lite-debuginfoUpgrade bind-pkcs11-utils-debuginfoUpgrade bind9.16-dnssec-utils-debuginfoUpgrade bind-libsUpgrade bind-dnssec-utils-debuginfoUpgrade bind9.16-utils-debuginfoUpgrade bind-debuginfoUpgrade bind-pkcs11-libsUpgrade bind9.16-debugsourceUpgrade bind9.16Upgrade bind-pkcs11-develUpgrade python3-bind9.16Upgrade bind9.16-debuginfoUpgrade bind-export-libs-debuginfoUpgrade bind-pkcs11Upgrade bind9.16-libs-debuginfoUpgrade bind9.16-chrootUpgrade bind9.16-utilsUpgrade bind-pkcs11-libs-debuginfoUpgrade bind-pkcs11-utilsUpgrade bind-export-develUpgrade bind-libs-debuginfoUpgrade bind-dnssec-docUpgrade bind-export-libsUpgrade bind-utils-debuginfoUpgrade bind-lite-develUpgrade bind9.16-licenseUpgrade bind9.16-libsUpgrade bind-sdb-debuginfoUpgrade bind-sdb-chrootUpgrade bindUpgrade bind-utilsUpgrade bind-libs-liteUpgrade bind-dnssec-utilsUpgrade bind-licenseUpgrade bind-sdbUpgrade bind-pkcs11-debuginfoUpgrade bind-chrootUpgrade bind-debugsource | May 15, 2023 | Jan 26, 2023 |
| Debian | — | Upgrade bind9 | Jan 30, 2023 | Jan 26, 2023 |
| Dns Bind | — | Upgrade ISC BIND to latest version | Mar 7, 2023 | Jan 26, 2023 |
| Huawei Euleros 2_0_sp11 | — | Upgrade bind-dnssec-utilsUpgrade bindUpgrade bind-dnssec-docUpgrade bind-libsUpgrade bind-pkcs11-utilsUpgrade bind-pkcs11-libsUpgrade bind-utilsUpgrade bind-pkcs11Upgrade python3-bindUpgrade bind-chrootUpgrade bind-license | May 8, 2023 | Jan 26, 2023 |
| Ibm Aix | — | Apply the fix or workaround for bind_advisory23 | Jul 27, 2023 | Jan 26, 2023 |
| Oracle_linux | — | Upgrade bind-pkcs11Upgrade bind-sdbUpgrade bind9.16-libsUpgrade bind9.16-docUpgrade bind-dnssec-docUpgrade bind-lite-develUpgrade bind-chrootUpgrade bind-pkcs11-libsUpgrade bindUpgrade bind-utilsUpgrade bind-libs-liteUpgrade bind-pkcs11-utilsUpgrade bind-docUpgrade bind-develUpgrade bind9.16-develUpgrade bind-dnssec-utilsUpgrade bind-pkcs11-develUpgrade bind-sdb-chrootUpgrade bind9.16-chrootUpgrade bind9.16Upgrade bind9.16-utilsUpgrade bind-export-develUpgrade python3-bindUpgrade bind9.16-licenseUpgrade bind-licenseUpgrade bind-libsUpgrade bind9.16-dnssec-utilsUpgrade bind-export-libsUpgrade python3-bind9.16 | May 18, 2023 | Jan 25, 2023 |
| Redhat_linux | — | Upgrade bind-debuginfoUpgrade bind-utils-debuginfoUpgrade bind-develUpgrade bind9.16-develUpgrade bindUpgrade bind-pkcs11Upgrade bind9.16-chrootUpgrade bind-dnssec-docUpgrade bind-debugsourceUpgrade bind-dnssec-utilsUpgrade bind-docUpgrade bind-libs-liteUpgrade bind9.16-utils-debuginfoUpgrade bind-libs-lite-debuginfoUpgrade bind9.16-dnssec-utilsUpgrade dhcp-server-debuginfoUpgrade bind-pkcs11-utilsUpgrade bind9.16Upgrade bind9.16-libs-debuginfoUpgrade bind-export-develUpgrade bind-libsUpgrade bind-sdbUpgrade bind-chrootUpgrade bind-export-libs-debuginfoUpgrade dhcp-libsUpgrade bind-utilsUpgrade bind-lite-develUpgrade dhcp-clientUpgrade bind9.16-licenseUpgrade dhcp-relay-debuginfoUpgrade dhcp-relayUpgrade bind-pkcs11-libs-debuginfoUpgrade bind-export-libsUpgrade bind9.16-utilsNo solution existsUpgrade bind9.16-debuginfoUpgrade bind9.16-docUpgrade dhcp-debuginfoUpgrade dhcp-client-debuginfoUpgrade bind-pkcs11-utils-debuginfoUpgrade bind-pkcs11-libsUpgrade bind-libs-debuginfoUpgrade bind9.16-dnssec-utils-debuginfoUpgrade python3-bindUpgrade dhcp-serverUpgrade bind9.16-libsUpgrade python3-bind9.16Upgrade dhcp-libs-debuginfoUpgrade dhcp-debugsourceUpgrade dhcp-commonUpgrade bind-licenseUpgrade bind-sdb-chrootUpgrade bind-sdb-debuginfoUpgrade bind-dnssec-utils-debuginfoUpgrade bind-pkcs11-debuginfoUpgrade bind-pkcs11-develUpgrade bind9.16-debugsource | May 15, 2023 | Jan 26, 2023 |
| Suse | — | suse-upgrade-bindsuse-upgrade-bind-chrootenvsuse-upgrade-bind-develsuse-upgrade-bind-docsuse-upgrade-bind-utilssuse-upgrade-libbind9-1600suse-upgrade-libdns1605suse-upgrade-libirs-develsuse-upgrade-libirs1601suse-upgrade-libisc1606suse-upgrade-libisccc1600suse-upgrade-libisccfg1600suse-upgrade-libns1604suse-upgrade-python3-bind | Feb 13, 2023 | Jan 26, 2023 |
| Ubuntu | — | Upgrade bind9 | Mar 22, 2023 | Jan 26, 2023 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Jan 20, 2025 | Jan 25, 2023 |
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