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-docUpgrade bind-pkcs11-libsUpgrade bind9.16-licenseUpgrade bind-lite-develUpgrade bind-sdb-chrootUpgrade bind-pkcs11-develUpgrade bind9.16-develUpgrade bind9.16Upgrade bind9.16-utilsUpgrade bind-utilsUpgrade python3-bindUpgrade bind-export-develUpgrade bind-libs-liteUpgrade bind-sdbUpgrade bind-docUpgrade bind-chrootUpgrade bind-pkcs11Upgrade bind9.16-libsUpgrade bind9.16-chrootUpgrade bind-develUpgrade bind-libsUpgrade python3-bind9.16Upgrade bind-export-libsUpgrade bind-pkcs11-utilsUpgrade bind-licenseUpgrade bind-dnssec-utilsUpgrade bindUpgrade bind9.16-dnssec-utilsUpgrade bind-dnssec-doc | May 15, 2023 | Jan 26, 2023 |
| Alpine Linux | — | Upgrade bind | Aug 22, 2024 | Jan 25, 2023 |
| Amazon Linux Ami 2 | — | Upgrade bindUpgrade bind-export-develUpgrade bind-pkcs11-utilsUpgrade bind-libsUpgrade bind-chrootUpgrade bind-pkcs11Upgrade bind-sdb-chrootUpgrade bind-develUpgrade bind-sdbUpgrade bind-debuginfoUpgrade bind-lite-develUpgrade bind-libs-liteUpgrade bind-pkcs11-libsUpgrade bind-pkcs11-develUpgrade bind-export-libsUpgrade bind-utilsUpgrade bind-license | Jan 10, 2025 | Jan 26, 2023 |
| Amazon_linux_2023 | — | Upgrade bind-develUpgrade bindUpgrade bind-dlz-mysqlUpgrade bind-pkcs11-develUpgrade bind-dnssec-utils-debuginfoUpgrade bind-licenseUpgrade bind-dlz-ldap-debuginfoUpgrade bind-dnssec-utilsUpgrade bind-dlz-mysql-debuginfoUpgrade bind-pkcs11Upgrade bind-debugsourceUpgrade bind-dlz-sqlite3-debuginfoUpgrade python3-bindUpgrade bind-dlz-ldapUpgrade bind-libs-debuginfoUpgrade bind-pkcs11-utilsUpgrade bind-pkcs11-debuginfoUpgrade bind-utils-debuginfoUpgrade bind-pkcs11-libs-debuginfoUpgrade bind-debuginfoUpgrade bind-dnssec-docUpgrade bind-utilsUpgrade bind-dlz-sqlite3Upgrade bind-libsUpgrade bind-pkcs11-libsUpgrade bind-dlz-filesystemUpgrade bind-pkcs11-utils-debuginfoUpgrade bind-chrootUpgrade bind-dlz-filesystem-debuginfo | Feb 17, 2025 | Jan 25, 2023 |
| Centos_linux | — | Upgrade bind-libs-debuginfoUpgrade bind-licenseUpgrade bind-dnssec-utilsUpgrade bind-sdb-debuginfoUpgrade bind-sdbUpgrade bind-pkcs11-debuginfoUpgrade bind-chrootUpgrade bind9.16-libsUpgrade bind-export-develUpgrade bind-export-libsUpgrade bind-dnssec-docUpgrade bind-pkcs11-utilsUpgrade bind-utils-debuginfoUpgrade bind-lite-develUpgrade bind9.16-licenseUpgrade bindUpgrade bind-debugsourceUpgrade bind-libs-liteUpgrade bind-sdb-chrootUpgrade bind-utilsUpgrade bind9.16-chrootUpgrade python3-bindUpgrade bind9.16-utils-debuginfoUpgrade bind-export-libs-debuginfoUpgrade bind-pkcs11-develUpgrade bind9.16-dnssec-utils-debuginfoUpgrade bind9.16-debugsourceUpgrade bind-pkcs11-utils-debuginfoUpgrade bind-pkcs11-libsUpgrade bind-dnssec-utils-debuginfoUpgrade bind-develUpgrade bind-libs-lite-debuginfoUpgrade bind-debuginfoUpgrade python3-bind9.16Upgrade bind9.16Upgrade bind9.16-utilsUpgrade bind9.16-debuginfoUpgrade bind-pkcs11-libs-debuginfoUpgrade bind9.16-libs-debuginfoUpgrade bind-pkcs11Upgrade bind9.16-dnssec-utilsUpgrade bind-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-chrootUpgrade bind-dnssec-utilsUpgrade python3-bindUpgrade bind-utilsUpgrade bind-pkcs11-utilsUpgrade bind-pkcs11-libsUpgrade bind-libsUpgrade bind-pkcs11Upgrade bindUpgrade 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 bindUpgrade bind9.16-libsUpgrade bind-docUpgrade bind-utilsUpgrade bind-dnssec-docUpgrade bind-pkcs11-utilsUpgrade bind9.16-docUpgrade bind-chrootUpgrade bind-libs-liteUpgrade bind-sdbUpgrade bind-pkcs11Upgrade bind-lite-develUpgrade bind-pkcs11-libsUpgrade bind9.16-develUpgrade bind-develUpgrade bind9.16-dnssec-utilsUpgrade bind9.16-licenseUpgrade bind-sdb-chrootUpgrade bind9.16-utilsUpgrade python3-bindUpgrade bind-libsUpgrade bind-export-develUpgrade python3-bind9.16Upgrade bind-dnssec-utilsUpgrade bind-pkcs11-develUpgrade bind-export-libsUpgrade bind-licenseUpgrade bind9.16Upgrade bind9.16-chroot | May 18, 2023 | Jan 25, 2023 |
| Redhat_linux | — | No solution existsUpgrade bind9.16-debugsourceUpgrade bind9.16-utilsUpgrade bind-libs-debuginfoUpgrade dhcp-clientUpgrade bind-pkcs11-debuginfoUpgrade bind-pkcs11-utils-debuginfoUpgrade bind-pkcs11-develUpgrade dhcp-client-debuginfoUpgrade bind-sdb-debuginfoUpgrade bind-dnssec-utils-debuginfoUpgrade dhcp-relayUpgrade bind-pkcs11-libs-debuginfoUpgrade dhcp-relay-debuginfoUpgrade dhcp-libs-debuginfoUpgrade dhcp-commonUpgrade bind-licenseUpgrade bind9.16-dnssec-utils-debuginfoUpgrade python3-bindUpgrade bind-export-libsUpgrade bind-sdb-chrootUpgrade python3-bind9.16Upgrade bind9.16-libsUpgrade dhcp-serverUpgrade dhcp-debuginfoUpgrade bind9.16-licenseUpgrade bind-pkcs11-libsUpgrade bind9.16-debuginfoUpgrade dhcp-debugsourceUpgrade bind9.16-docUpgrade bind-utils-debuginfoUpgrade bind-lite-develUpgrade bind-pkcs11-utilsUpgrade bind-develUpgrade bind9.16-dnssec-utilsUpgrade bind9.16-develUpgrade bind-debuginfoUpgrade bind-pkcs11Upgrade bind-libs-lite-debuginfoUpgrade bindUpgrade bind9.16-utils-debuginfoUpgrade bind9.16-chrootUpgrade bind-sdbUpgrade bind-export-libs-debuginfoUpgrade bind-chrootUpgrade bind-utilsUpgrade dhcp-libsUpgrade bind9.16Upgrade bind9.16-libs-debuginfoUpgrade bind-libsUpgrade bind-export-develUpgrade dhcp-server-debuginfoUpgrade bind-docUpgrade bind-dnssec-utilsUpgrade bind-debugsourceUpgrade bind-dnssec-docUpgrade bind-libs-lite | May 15, 2023 | Jan 26, 2023 |
| Suse | — | Upgrade libns1604Upgrade bind-utilsUpgrade libisc1606Upgrade libisccc1600Upgrade libirs1601Upgrade libdns1605Upgrade libisccfg1600Upgrade python3-bindUpgrade bind-chrootenvUpgrade bindUpgrade bind-docUpgrade libbind9-1600Upgrade libirs-develUpgrade bind-devel | 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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