This issue can affect BIND 9 resolvers with `stale-answer-enable yes;` that also make use of the option `stale-answer-client-timeout`, configured with a value greater than zero.
If the resolver receives many queries that require recursion, there will be a corresponding increase in the number of clients that are waiting for recursion to complete. If there are sufficient clients already waiting when a new client query is received so that it is necessary to SERVFAIL the longest waiting client (see BIND 9 ARM `recursive-clients` limit and soft quota), then it is possible for a race to occur between providing a stale answer to this older client and sending an early timeout SERVFAIL, which may cause an assertion failure. This issue affects BIND 9 versions 9.16.12 through 9.16.36, 9.18.0 through 9.18.10, 9.19.0 through 9.19.8, and 9.16.12-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 | alma-upgrade-bindalma-upgrade-bind-chrootalma-upgrade-bind-develalma-upgrade-bind-dnssec-docalma-upgrade-bind-dnssec-utilsalma-upgrade-bind-docalma-upgrade-bind-libsalma-upgrade-bind-licensealma-upgrade-bind-utilsalma-upgrade-bind9.16alma-upgrade-bind9.16-chrootalma-upgrade-bind9.16-develalma-upgrade-bind9.16-dnssec-utilsalma-upgrade-bind9.16-docalma-upgrade-bind9.16-libsalma-upgrade-bind9.16-licensealma-upgrade-bind9.16-utilsalma-upgrade-python3-bindalma-upgrade-python3-bind9.16 | May 15, 2023 | Jan 26, 2023 | |
| Alpine Linux | alpine-linux-upgrade-bind | Aug 22, 2024 | Jan 25, 2023 | |
| Amazon_linux_2023 | amazon-linux-2023-upgrade-bindamazon-linux-2023-upgrade-bind-chrootamazon-linux-2023-upgrade-bind-debuginfoamazon-linux-2023-upgrade-bind-debugsourceamazon-linux-2023-upgrade-bind-develamazon-linux-2023-upgrade-bind-dlz-filesystemamazon-linux-2023-upgrade-bind-dlz-filesystem-debuginfoamazon-linux-2023-upgrade-bind-dlz-ldapamazon-linux-2023-upgrade-bind-dlz-ldap-debuginfoamazon-linux-2023-upgrade-bind-dlz-mysqlamazon-linux-2023-upgrade-bind-dlz-mysql-debuginfoamazon-linux-2023-upgrade-bind-dlz-sqlite3amazon-linux-2023-upgrade-bind-dlz-sqlite3-debuginfoamazon-linux-2023-upgrade-bind-dnssec-docamazon-linux-2023-upgrade-bind-dnssec-utilsamazon-linux-2023-upgrade-bind-dnssec-utils-debuginfoamazon-linux-2023-upgrade-bind-libsamazon-linux-2023-upgrade-bind-libs-debuginfoamazon-linux-2023-upgrade-bind-licenseamazon-linux-2023-upgrade-bind-pkcs11amazon-linux-2023-upgrade-bind-pkcs11-debuginfoamazon-linux-2023-upgrade-bind-pkcs11-develamazon-linux-2023-upgrade-bind-pkcs11-libsamazon-linux-2023-upgrade-bind-pkcs11-libs-debuginfoamazon-linux-2023-upgrade-bind-pkcs11-utilsamazon-linux-2023-upgrade-bind-pkcs11-utils-debuginfoamazon-linux-2023-upgrade-bind-utilsamazon-linux-2023-upgrade-bind-utils-debuginfoamazon-linux-2023-upgrade-python3-bind | Feb 17, 2025 | Jan 25, 2023 | |
| Centos_linux | — | centos-upgrade-bindcentos-upgrade-bind-chrootcentos-upgrade-bind-debuginfocentos-upgrade-bind-debugsourcecentos-upgrade-bind-dnssec-doccentos-upgrade-bind-dnssec-utilscentos-upgrade-bind-dnssec-utils-debuginfocentos-upgrade-bind-libscentos-upgrade-bind-libs-debuginfocentos-upgrade-bind-licensecentos-upgrade-bind-utilscentos-upgrade-bind-utils-debuginfocentos-upgrade-bind9-16centos-upgrade-bind9-16-chrootcentos-upgrade-bind9-16-debuginfocentos-upgrade-bind9-16-debugsourcecentos-upgrade-bind9-16-dnssec-utilscentos-upgrade-bind9-16-dnssec-utils-debuginfocentos-upgrade-bind9-16-libscentos-upgrade-bind9-16-libs-debuginfocentos-upgrade-bind9-16-licensecentos-upgrade-bind9-16-utilscentos-upgrade-bind9-16-utils-debuginfocentos-upgrade-python3-bindcentos-upgrade-python3-bind9-16 | May 15, 2023 | Jan 26, 2023 |
| Debian | debian-upgrade-bind9 | Jan 30, 2023 | Jan 26, 2023 | |
| Dns Bind | upgrade-isc-bind-latest | Mar 7, 2023 | Jan 26, 2023 | |
| Huawei Euleros 2_0_sp11 | huawei-euleros-2_0_sp11-upgrade-bindhuawei-euleros-2_0_sp11-upgrade-bind-chroothuawei-euleros-2_0_sp11-upgrade-bind-dnssec-dochuawei-euleros-2_0_sp11-upgrade-bind-dnssec-utilshuawei-euleros-2_0_sp11-upgrade-bind-libshuawei-euleros-2_0_sp11-upgrade-bind-licensehuawei-euleros-2_0_sp11-upgrade-bind-pkcs11huawei-euleros-2_0_sp11-upgrade-bind-pkcs11-libshuawei-euleros-2_0_sp11-upgrade-bind-pkcs11-utilshuawei-euleros-2_0_sp11-upgrade-bind-utilshuawei-euleros-2_0_sp11-upgrade-python3-bind | May 8, 2023 | Jan 26, 2023 | |
| Ibm Aix | ibm-aix-bind_advisory23 | Jul 27, 2023 | Jan 26, 2023 | |
| Oracle_linux | — | oracle-linux-upgrade-bindoracle-linux-upgrade-bind9-16oracle-linux-upgrade-bind9-16-chrootoracle-linux-upgrade-bind9-16-develoracle-linux-upgrade-bind9-16-dnssec-utilsoracle-linux-upgrade-bind9-16-docoracle-linux-upgrade-bind9-16-libsoracle-linux-upgrade-bind9-16-licenseoracle-linux-upgrade-bind9-16-utilsoracle-linux-upgrade-bind-chrootoracle-linux-upgrade-bind-develoracle-linux-upgrade-bind-dnssec-docoracle-linux-upgrade-bind-dnssec-utilsoracle-linux-upgrade-bind-docoracle-linux-upgrade-bind-libsoracle-linux-upgrade-bind-licenseoracle-linux-upgrade-bind-utilsoracle-linux-upgrade-python3-bindoracle-linux-upgrade-python3-bind9-16 | May 18, 2023 | Jan 25, 2023 |
| Redhat_linux | redhat-upgrade-bindredhat-upgrade-bind-chrootredhat-upgrade-bind-debuginforedhat-upgrade-bind-debugsourceredhat-upgrade-bind-develredhat-upgrade-bind-dnssec-docredhat-upgrade-bind-dnssec-utilsredhat-upgrade-bind-dnssec-utils-debuginforedhat-upgrade-bind-docredhat-upgrade-bind-libsredhat-upgrade-bind-libs-debuginforedhat-upgrade-bind-licenseredhat-upgrade-bind-utilsredhat-upgrade-bind-utils-debuginforedhat-upgrade-bind9-16redhat-upgrade-bind9-16-chrootredhat-upgrade-bind9-16-debuginforedhat-upgrade-bind9-16-debugsourceredhat-upgrade-bind9-16-develredhat-upgrade-bind9-16-dnssec-utilsredhat-upgrade-bind9-16-dnssec-utils-debuginforedhat-upgrade-bind9-16-docredhat-upgrade-bind9-16-libsredhat-upgrade-bind9-16-libs-debuginforedhat-upgrade-bind9-16-licenseredhat-upgrade-bind9-16-utilsredhat-upgrade-bind9-16-utils-debuginforedhat-upgrade-python3-bindredhat-upgrade-python3-bind9-16 | May 15, 2023 | Jan 26, 2023 | |
| Suse | — | suse-upgrade-bindsuse-upgrade-bind-docsuse-upgrade-bind-utilssuse-upgrade-python3-bind | Feb 13, 2023 | Jan 26, 2023 |
| Ubuntu | ubuntu-upgrade-bind9 | Mar 22, 2023 | Jan 26, 2023 | |
| Vmware Photon_os | vmware-photon_os_update_tdnf | Jan 20, 2025 | Jan 25, 2023 |
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