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 bind-sdb-chrootUpgrade bind-pkcs11-develUpgrade bind9.16-licenseUpgrade bind-pkcs11-libsUpgrade python3-bindUpgrade bind9.16-docUpgrade bind9.16-develUpgrade bind-lite-develUpgrade bind9.16Upgrade bind-utilsUpgrade bind9.16-utilsUpgrade bind9.16-dnssec-utilsUpgrade bind-sdbUpgrade python3-bind9.16Upgrade bind-pkcs11-utilsUpgrade bind9.16-chrootUpgrade bind-dnssec-utilsUpgrade bind-docUpgrade bind-pkcs11Upgrade bind-libs-liteUpgrade bind-export-develUpgrade bindUpgrade bind-develUpgrade bind-libsUpgrade bind-licenseUpgrade bind9.16-libsUpgrade bind-dnssec-docUpgrade bind-chrootUpgrade bind-export-libs | May 15, 2023 | Jan 26, 2023 |
| Alpine Linux | — | Upgrade bind | Aug 22, 2024 | Jan 25, 2023 |
| Amazon Linux Ami 2 | — | Upgrade bind-pkcs11-develUpgrade bind-utilsUpgrade bind-pkcs11-libsUpgrade bind-export-libsUpgrade bind-licenseUpgrade bind-sdb-chrootUpgrade bind-libs-liteUpgrade bind-develUpgrade bindUpgrade bind-export-develUpgrade bind-sdbUpgrade bind-pkcs11-utilsUpgrade bind-pkcs11Upgrade bind-chrootUpgrade bind-libsUpgrade bind-lite-develUpgrade bind-debuginfo | Jan 10, 2025 | Jan 26, 2023 |
| Amazon_linux_2023 | — | Upgrade bind-libs-debuginfoUpgrade bind-dlz-mysql-debuginfoUpgrade bind-pkcs11-develUpgrade bindUpgrade bind-dlz-ldapUpgrade bind-dlz-mysqlUpgrade bind-pkcs11Upgrade bind-licenseUpgrade bind-dnssec-utilsUpgrade bind-debugsourceUpgrade bind-develUpgrade python3-bindUpgrade bind-dnssec-utils-debuginfoUpgrade bind-dlz-ldap-debuginfoUpgrade bind-dlz-sqlite3-debuginfoUpgrade bind-pkcs11-debuginfoUpgrade bind-chrootUpgrade bind-dnssec-docUpgrade bind-debuginfoUpgrade bind-dlz-filesystemUpgrade bind-pkcs11-utilsUpgrade bind-pkcs11-libs-debuginfoUpgrade bind-pkcs11-libsUpgrade bind-utils-debuginfoUpgrade bind-libsUpgrade bind-dlz-sqlite3Upgrade bind-utilsUpgrade bind-pkcs11-utils-debuginfoUpgrade bind-dlz-filesystem-debuginfo | Feb 17, 2025 | Jan 25, 2023 |
| Centos_linux | — | Upgrade bind-libsUpgrade bind9.16-libs-debuginfoUpgrade bind-libs-lite-debuginfoUpgrade bind-pkcs11Upgrade bind-develUpgrade bind9.16Upgrade bind9.16-utils-debuginfoUpgrade python3-bind9.16Upgrade bind-dnssec-utils-debuginfoUpgrade bind-pkcs11-libsUpgrade bind-pkcs11-libs-debuginfoUpgrade bind9.16-chrootUpgrade bind9.16-utilsUpgrade bind-pkcs11-develUpgrade bind-export-libs-debuginfoUpgrade bind9.16-dnssec-utilsUpgrade bind9.16-debuginfoUpgrade bind-debuginfoUpgrade bind-pkcs11-utils-debuginfoUpgrade bind9.16-debugsourceUpgrade python3-bindUpgrade bind9.16-dnssec-utils-debuginfoUpgrade bind9.16-licenseUpgrade bind-dnssec-docUpgrade bind-pkcs11-utilsUpgrade bind-utilsUpgrade bind-sdb-debuginfoUpgrade bind-debugsourceUpgrade bind-export-libsUpgrade bind-lite-develUpgrade bind-utils-debuginfoUpgrade bind-export-develUpgrade bindUpgrade bind-licenseUpgrade bind-libs-debuginfoUpgrade bind-dnssec-utilsUpgrade bind-chrootUpgrade bind-pkcs11-debuginfoUpgrade bind-sdbUpgrade bind-sdb-chrootUpgrade bind-libs-liteUpgrade bind9.16-libs | 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-licenseUpgrade python3-bindUpgrade bind-chrootUpgrade bind-dnssec-utilsUpgrade bind-pkcs11Upgrade bind-dnssec-docUpgrade bindUpgrade bind-libsUpgrade bind-pkcs11-libsUpgrade bind-utilsUpgrade bind-pkcs11-utils | 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 bind9.16-docUpgrade bind9.16-libsUpgrade bind-sdbUpgrade bind-pkcs11-utilsUpgrade bind-libs-liteUpgrade bind-docUpgrade bind-utilsUpgrade bindUpgrade bind-chrootUpgrade bind-develUpgrade bind-pkcs11-libsUpgrade bind-lite-develUpgrade bind-pkcs11Upgrade bind9.16-develUpgrade bind-dnssec-docUpgrade bind-licenseUpgrade bind9.16Upgrade bind9.16-chrootUpgrade bind9.16-licenseUpgrade bind-export-develUpgrade python3-bindUpgrade bind-dnssec-utilsUpgrade bind-libsUpgrade bind-pkcs11-develUpgrade bind-export-libsUpgrade bind-sdb-chrootUpgrade python3-bind9.16Upgrade bind9.16-utilsUpgrade bind9.16-dnssec-utils | May 18, 2023 | Jan 25, 2023 |
| Redhat_linux | — | Upgrade dhcp-relay-debuginfoUpgrade bind-sdb-debuginfoUpgrade dhcp-commonUpgrade bind-licenseUpgrade bind-dnssec-utils-debuginfoUpgrade bind-pkcs11-develUpgrade dhcp-client-debuginfoUpgrade bind9.16-debugsourceUpgrade bind-export-libsUpgrade bind9.16-docUpgrade dhcp-debuginfoUpgrade dhcp-clientUpgrade bind-pkcs11-libs-debuginfoUpgrade bind-pkcs11-debuginfoUpgrade bind9.16-debuginfoUpgrade bind-libs-debuginfoUpgrade bind-pkcs11-utils-debuginfoUpgrade bind-pkcs11-libsUpgrade dhcp-relayUpgrade bind9.16-libsUpgrade bind-sdb-chrootUpgrade python3-bind9.16Upgrade bind9.16-dnssec-utils-debuginfoUpgrade dhcp-serverUpgrade bind9.16-utilsUpgrade python3-bindUpgrade dhcp-debugsourceUpgrade bind9.16-licenseUpgrade dhcp-libs-debuginfoNo solution existsUpgrade bind-pkcs11-utilsUpgrade bind-dnssec-docUpgrade bind9.16-libs-debuginfoUpgrade bind-libsUpgrade bind-dnssec-utilsUpgrade bindUpgrade bind-export-libs-debuginfoUpgrade dhcp-libsUpgrade bind9.16-dnssec-utilsUpgrade bind-libs-lite-debuginfoUpgrade bind-lite-develUpgrade bind-sdbUpgrade bind-chrootUpgrade bind-debuginfoUpgrade bind-pkcs11Upgrade bind-debugsourceUpgrade bind9.16-chrootUpgrade bind-utilsUpgrade bind9.16-utils-debuginfoUpgrade bind9.16-develUpgrade bind-develUpgrade bind-utils-debuginfoUpgrade dhcp-server-debuginfoUpgrade bind9.16Upgrade bind-libs-liteUpgrade bind-docUpgrade bind-export-devel | May 15, 2023 | Jan 26, 2023 |
| Suse | — | Upgrade libisccc1600Upgrade libisc1606Upgrade libns1604Upgrade libisccfg1600Upgrade python3-bindUpgrade libirs1601Upgrade libdns1605Upgrade bind-utilsUpgrade bind-develUpgrade libbind9-1600Upgrade bind-docUpgrade bind-chrootenvUpgrade libirs-develUpgrade 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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