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 bindUpgrade bind-pkcs11Upgrade bind-pkcs11-utilsUpgrade bind-export-develUpgrade bind-licenseUpgrade bind9.16-dnssec-utilsUpgrade bind-libs-liteUpgrade bind-dnssec-docUpgrade bind-chrootUpgrade bind-sdbUpgrade bind-libsUpgrade bind-export-libsUpgrade python3-bind9.16Upgrade bind-develUpgrade bind-docUpgrade bind9.16-chrootUpgrade bind-dnssec-utilsUpgrade bind9.16-libsUpgrade bind-pkcs11-libsUpgrade bind-lite-develUpgrade bind9.16-develUpgrade bind-pkcs11-develUpgrade bind9.16Upgrade bind9.16-licenseUpgrade bind-utilsUpgrade bind9.16-utilsUpgrade bind9.16-docUpgrade python3-bindUpgrade bind-sdb-chroot | May 15, 2023 | Jan 26, 2023 |
| Alpine Linux | — | Upgrade bind | Aug 22, 2024 | Jan 25, 2023 |
| Amazon Linux Ami 2 | — | Upgrade bind-lite-develUpgrade bind-debuginfoUpgrade bind-libs-liteUpgrade bind-libsUpgrade bind-pkcs11Upgrade bind-chrootUpgrade bindUpgrade bind-develUpgrade bind-sdb-chrootUpgrade bind-pkcs11-utilsUpgrade bind-export-develUpgrade bind-sdbUpgrade bind-export-libsUpgrade bind-licenseUpgrade bind-pkcs11-develUpgrade bind-utilsUpgrade bind-pkcs11-libs | Jan 10, 2025 | Jan 26, 2023 |
| Amazon_linux_2023 | — | Upgrade bind-dlz-filesystem-debuginfoUpgrade bind-dlz-filesystemUpgrade bind-utils-debuginfoUpgrade bind-pkcs11-libsUpgrade bind-chrootUpgrade bind-debuginfoUpgrade bind-dnssec-docUpgrade bind-pkcs11-utils-debuginfoUpgrade bind-libsUpgrade bind-utilsUpgrade bind-pkcs11-utilsUpgrade bind-dlz-sqlite3Upgrade bind-pkcs11-libs-debuginfoUpgrade bind-pkcs11-debuginfoUpgrade bind-dlz-mysqlUpgrade bindUpgrade bind-debugsourceUpgrade bind-dlz-sqlite3-debuginfoUpgrade python3-bindUpgrade bind-pkcs11-develUpgrade bind-licenseUpgrade bind-dnssec-utils-debuginfoUpgrade bind-dlz-ldap-debuginfoUpgrade bind-pkcs11Upgrade bind-dnssec-utilsUpgrade bind-dlz-ldapUpgrade bind-libs-debuginfoUpgrade bind-dlz-mysql-debuginfoUpgrade bind-devel | Feb 17, 2025 | Jan 25, 2023 |
| Centos_linux | — | Upgrade bind-sdbUpgrade bind-chrootUpgrade bind-pkcs11-debuginfoUpgrade bind-libs-liteUpgrade bind-lite-develUpgrade bind-pkcs11-utilsUpgrade bind9.16-licenseUpgrade bind-export-develUpgrade bind-export-libsUpgrade bind-utils-debuginfoUpgrade bind-sdb-debuginfoUpgrade bind9.16-libsUpgrade bind-dnssec-utilsUpgrade bind-dnssec-docUpgrade bind-sdb-chrootUpgrade bind-libs-debuginfoUpgrade bind-licenseUpgrade bind-utilsUpgrade bindUpgrade bind-debugsourceUpgrade bind-pkcs11-libsUpgrade bind9.16-dnssec-utils-debuginfoUpgrade bind-pkcs11-develUpgrade bind-pkcs11-utils-debuginfoUpgrade bind9.16-debugsourceUpgrade bind9.16-utils-debuginfoUpgrade bind-dnssec-utils-debuginfoUpgrade bind-pkcs11Upgrade bind9.16-libs-debuginfoUpgrade bind-develUpgrade bind-libs-lite-debuginfoUpgrade bind9.16-chrootUpgrade bind-pkcs11-libs-debuginfoUpgrade python3-bind9.16Upgrade bind9.16Upgrade bind-export-libs-debuginfoUpgrade bind9.16-utilsUpgrade bind9.16-debuginfoUpgrade python3-bindUpgrade bind9.16-dnssec-utilsUpgrade bind-libsUpgrade bind-debuginfo | 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-docUpgrade bindUpgrade bind-pkcs11Upgrade bind-pkcs11-utilsUpgrade bind-utilsUpgrade bind-pkcs11-libsUpgrade bind-libsUpgrade bind-dnssec-utilsUpgrade 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-pkcs11-libsUpgrade bind9.16-develUpgrade bind-dnssec-docUpgrade bind-docUpgrade bind9.16-docUpgrade bind-chrootUpgrade bind-pkcs11Upgrade bind-pkcs11-utilsUpgrade bind-libs-liteUpgrade bind-sdbUpgrade bindUpgrade bind9.16-libsUpgrade bind-develUpgrade bind-lite-develUpgrade bind-utilsUpgrade python3-bind9.16Upgrade bind9.16-licenseUpgrade bind9.16-utilsUpgrade python3-bindUpgrade bind-dnssec-utilsUpgrade bind-export-develUpgrade bind-sdb-chrootUpgrade bind-licenseUpgrade bind-libsUpgrade bind-pkcs11-develUpgrade bind-export-libsUpgrade bind9.16-dnssec-utilsUpgrade bind9.16-chrootUpgrade bind9.16 | May 18, 2023 | Jan 25, 2023 |
| Redhat_linux | — | Upgrade bind-lite-develUpgrade bind-export-develUpgrade bind-libsUpgrade bind9.16-libs-debuginfoUpgrade bind9.16Upgrade bind-utils-debuginfoUpgrade bind-develUpgrade bind-dnssec-docUpgrade bind-docUpgrade dhcp-server-debuginfoUpgrade bind9.16-develUpgrade bind9.16-chrootUpgrade bind-utilsUpgrade bind9.16-utils-debuginfoUpgrade bind-debuginfoUpgrade bind-pkcs11Upgrade bindUpgrade bind-pkcs11-utilsUpgrade bind-libs-lite-debuginfoUpgrade dhcp-libsUpgrade bind9.16-dnssec-utilsUpgrade bind-libs-liteUpgrade bind-sdbUpgrade bind-export-libs-debuginfoUpgrade bind-chrootUpgrade bind-dnssec-utilsUpgrade bind-debugsourceUpgrade dhcp-serverUpgrade dhcp-relay-debuginfoUpgrade bind-pkcs11-debuginfoUpgrade bind-pkcs11-develUpgrade dhcp-client-debuginfoUpgrade bind-sdb-debuginfoUpgrade bind-pkcs11-libs-debuginfoUpgrade bind9.16-debuginfoUpgrade bind9.16-licenseUpgrade bind-export-libsUpgrade bind9.16-utilsNo solution existsUpgrade dhcp-relayUpgrade bind-dnssec-utils-debuginfoUpgrade python3-bindUpgrade dhcp-commonUpgrade bind9.16-debugsourceUpgrade bind-pkcs11-utils-debuginfoUpgrade dhcp-clientUpgrade bind-libs-debuginfoUpgrade python3-bind9.16Upgrade dhcp-debuginfoUpgrade bind9.16-docUpgrade dhcp-debugsourceUpgrade bind-licenseUpgrade bind-sdb-chrootUpgrade bind-pkcs11-libsUpgrade dhcp-libs-debuginfoUpgrade bind9.16-dnssec-utils-debuginfoUpgrade bind9.16-libs | May 15, 2023 | Jan 26, 2023 |
| Suse | — | Upgrade bind-chrootenvUpgrade libirs-develUpgrade bind-docUpgrade libbind9-1600Upgrade bindUpgrade bind-develUpgrade bind-utilsUpgrade libns1604Upgrade libirs1601Upgrade libisccfg1600Upgrade libisc1606Upgrade libdns1605Upgrade python3-bindUpgrade libisccc1600 | 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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