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