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 python3-bindUpgrade bind-lite-develUpgrade bind-sdb-chrootUpgrade bind-pkcs11-libsUpgrade bind9.16-licenseUpgrade bind9.16-utilsUpgrade bind-utilsUpgrade bind9.16-docUpgrade bind9.16Upgrade bind-pkcs11-develUpgrade bind9.16-develUpgrade bind-sdbUpgrade bind9.16-chrootUpgrade bindUpgrade bind-docUpgrade bind-dnssec-utilsUpgrade bind-develUpgrade python3-bind9.16Upgrade bind-pkcs11Upgrade bind9.16-dnssec-utilsUpgrade bind-pkcs11-utilsUpgrade bind-export-develUpgrade bind-dnssec-docUpgrade bind-libs-liteUpgrade bind-licenseUpgrade bind-export-libsUpgrade bind9.16-libsUpgrade bind-libsUpgrade bind-chroot | May 15, 2023 | Jan 26, 2023 |
| Alpine Linux | — | Upgrade bind | Aug 22, 2024 | Jan 25, 2023 |
| Amazon Linux Ami 2 | — | Upgrade bind-utilsUpgrade bind-pkcs11-develUpgrade bind-export-libsUpgrade bind-pkcs11-libsUpgrade bind-licenseUpgrade bind-libsUpgrade bind-debuginfoUpgrade bind-lite-develUpgrade bind-libs-liteUpgrade bind-sdbUpgrade bind-develUpgrade bind-export-develUpgrade bindUpgrade bind-sdb-chrootUpgrade bind-pkcs11-utilsUpgrade bind-pkcs11Upgrade bind-chroot | Jan 10, 2025 | Jan 26, 2023 |
| Amazon_linux_2023 | — | Upgrade bind-dlz-sqlite3-debuginfoUpgrade bind-dlz-ldap-debuginfoUpgrade bind-debugsourceUpgrade bind-dlz-mysql-debuginfoUpgrade bind-dlz-ldapUpgrade bind-dnssec-utilsUpgrade bind-pkcs11Upgrade bind-libs-debuginfoUpgrade bind-dlz-mysqlUpgrade bind-licenseUpgrade python3-bindUpgrade bindUpgrade bind-develUpgrade bind-pkcs11-develUpgrade bind-dnssec-utils-debuginfoUpgrade bind-utilsUpgrade bind-debuginfoUpgrade bind-pkcs11-utils-debuginfoUpgrade bind-utils-debuginfoUpgrade bind-dlz-sqlite3Upgrade bind-dnssec-docUpgrade bind-chrootUpgrade bind-pkcs11-libs-debuginfoUpgrade bind-pkcs11-utilsUpgrade bind-dlz-filesystemUpgrade bind-pkcs11-libsUpgrade bind-libsUpgrade bind-pkcs11-debuginfoUpgrade bind-dlz-filesystem-debuginfo | Feb 17, 2025 | Jan 25, 2023 |
| Centos_linux | — | Upgrade bind-lite-develUpgrade bind-utils-debuginfoUpgrade bind-sdb-chrootUpgrade bind9.16-licenseUpgrade bind-pkcs11-debuginfoUpgrade bind-sdbUpgrade bind9.16-libsUpgrade bind-utilsUpgrade bind-chrootUpgrade bind-libs-liteUpgrade bind-dnssec-utilsUpgrade bind-libs-debuginfoUpgrade bindUpgrade bind-export-develUpgrade bind-export-libsUpgrade bind-sdb-debuginfoUpgrade bind-licenseUpgrade bind-debugsourceUpgrade bind-dnssec-docUpgrade bind-pkcs11-utilsUpgrade bind-pkcs11Upgrade bind-debuginfoUpgrade bind9.16-chrootUpgrade bind9.16-libs-debuginfoUpgrade bind9.16-debugsourceUpgrade bind-pkcs11-utils-debuginfoUpgrade bind-pkcs11-libsUpgrade bind-dnssec-utils-debuginfoUpgrade bind-develUpgrade bind-pkcs11-develUpgrade bind-libs-lite-debuginfoUpgrade bind9.16-utils-debuginfoUpgrade bind9.16-utilsUpgrade bind9.16-debuginfoUpgrade bind-pkcs11-libs-debuginfoUpgrade bind9.16-dnssec-utilsUpgrade bind-libsUpgrade python3-bindUpgrade bind9.16-dnssec-utils-debuginfoUpgrade bind-export-libs-debuginfoUpgrade python3-bind9.16Upgrade bind9.16 | 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 bind-chrootUpgrade bindUpgrade bind-pkcs11-libsUpgrade bind-libsUpgrade bind-utilsUpgrade bind-pkcs11Upgrade bind-dnssec-docUpgrade python3-bindUpgrade bind-pkcs11-utilsUpgrade 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-pkcs11-utilsUpgrade bind-chrootUpgrade bind9.16-docUpgrade bindUpgrade bind9.16-libsUpgrade bind-libs-liteUpgrade bind-docUpgrade bind-sdbUpgrade bind-dnssec-docUpgrade bind-pkcs11Upgrade bind-lite-develUpgrade bind-utilsUpgrade bind-develUpgrade bind-pkcs11-libsUpgrade bind9.16-develUpgrade python3-bindUpgrade bind-libsUpgrade bind-pkcs11-develUpgrade bind-export-libsUpgrade bind-dnssec-utilsUpgrade bind9.16-chrootUpgrade bind9.16-dnssec-utilsUpgrade bind9.16-utilsUpgrade bind-sdb-chrootUpgrade python3-bind9.16Upgrade bind-export-develUpgrade bind9.16Upgrade bind-licenseUpgrade bind9.16-license | May 18, 2023 | Jan 25, 2023 |
| Redhat_linux | — | Upgrade bind-pkcs11Upgrade bind-utils-debuginfoUpgrade bind-lite-develUpgrade bind9.16-develUpgrade bind-libsUpgrade bind9.16-utils-debuginfoUpgrade bind9.16Upgrade bind9.16-dnssec-utilsUpgrade bind9.16-chrootUpgrade bind-utilsUpgrade bind9.16-libs-debuginfoUpgrade bind-libs-lite-debuginfoUpgrade bind-export-develUpgrade bind-debuginfoUpgrade bind-pkcs11-utilsUpgrade bindUpgrade dhcp-libsUpgrade bind-develUpgrade bind-docUpgrade bind-sdbUpgrade bind-export-libs-debuginfoUpgrade bind-chrootUpgrade bind-libs-liteUpgrade dhcp-server-debuginfoUpgrade bind-dnssec-utilsUpgrade bind-debugsourceUpgrade bind-dnssec-docUpgrade bind9.16-licenseUpgrade bind9.16-debuginfoUpgrade bind-libs-debuginfoUpgrade dhcp-debuginfoUpgrade bind-export-libsUpgrade dhcp-relayUpgrade bind-pkcs11-libs-debuginfoUpgrade bind-pkcs11-utils-debuginfoUpgrade dhcp-serverUpgrade python3-bindUpgrade bind9.16-debugsourceUpgrade dhcp-commonUpgrade bind-pkcs11-libsUpgrade bind9.16-libsUpgrade python3-bind9.16Upgrade bind9.16-dnssec-utils-debuginfoUpgrade bind9.16-docUpgrade bind-pkcs11-debuginfoUpgrade bind-sdb-debuginfoUpgrade dhcp-relay-debuginfoUpgrade bind-dnssec-utils-debuginfoUpgrade dhcp-clientUpgrade dhcp-client-debuginfoUpgrade bind-pkcs11-develUpgrade bind-licenseUpgrade bind-sdb-chrootUpgrade dhcp-libs-debuginfoUpgrade bind9.16-utilsUpgrade dhcp-debugsourceNo solution exists | May 15, 2023 | Jan 26, 2023 |
| Suse | — | Upgrade bind-develUpgrade libirs-develUpgrade bind-docUpgrade libbind9-1600Upgrade bindUpgrade bind-chrootenvUpgrade libdns1605Upgrade libns1604Upgrade python3-bindUpgrade libisc1606Upgrade bind-utilsUpgrade libisccc1600Upgrade libisccfg1600Upgrade libirs1601 | 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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