Description
The DNS message parsing code in `named` includes a section whose computational complexity is overly high. It does not cause problems for typical DNS traffic, but crafted queries and responses may cause excessive CPU load on the affected `named` instance by exploiting this flaw. This issue affects both authoritative servers and recursive resolvers.
This issue affects BIND 9 versions 9.0.0 through 9.16.45, 9.18.0 through 9.18.21, 9.19.0 through 9.19.19, 9.9.3-S1 through 9.11.37-S1, 9.16.8-S1 through 9.16.45-S1, and 9.18.11-S1 through 9.18.21-S1.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| ISC | BIND 9 | 9.0.0 – ≤ 9.16.45, 9.18.0 – ≤ 9.18.21, 9.19.0 – ≤ 9.19.19, 9.9.3-S1 – ≤ 9.11.37-S1, 9.16.8-S1 – ≤ 9.16.45-S1, 9.18.11-S1 – ≤ 9.18.21-S1 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | bind9 | 1:9.19.21-1 | — |
| Debian 13 | bind9 | 1:9.19.21-1 | — |
| Debian 12 | bind9 | 1:9.18.24-1 | DSA-5621-1 |
| Debian 11 | bind9 | 1:9.16.48-1 | DSA-5621-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.04 LTS | isc-dhcp | No fix yet | — |
| Ubuntu 25.10 | isc-dhcp | No fix yet | — |
| Ubuntu 24.04 LTS | isc-dhcp | No fix yet | — |
| Ubuntu 22.04 LTS | bind9 | 1:9.18.18-0ubuntu0.22.04.2 | USN-6633-1 |
| Ubuntu 22.04 LTS | bind9-libs | No fix yet | — |
| Ubuntu 20.04 LTS | bind9 | 1:9.16.48-0ubuntu0.20.04.1 | USN-6642-1 |
| Ubuntu 20.04 LTS | bind9-libs | No fix yet | — |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 18.04 LTS | bind9 | No fix yet | — |
| Ubuntu Pro 16.04 LTS | bind9 | No fix yet | — |
| Ubuntu Pro 14.04 LTS | bind9 | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 9 | bind +9 | 32:9.16.23-14.el9_3.4 | RHSA-2024:2551, RHSA-2024:1789 |
| RHEL 9 | bind-dyndb-ldap | 11.9-8.el9_3.3 | RHSA-2024:2551, RHSA-2024:1789 |
| RHEL 8 | bind +16 | 32:9.11.36-11.el8_9.1 | RHSA-2024:3271, RHSA-2024:1782 |
| RHEL 8 | bind9.16 +8 | 32:9.16.23-0.16.el8_9.2 | RHSA-2024:1781 |
| RHEL 7 | bind +15 | 32:9.11.4-26.P2.el7_9.16 | RHSA-2024:3741 |
| RHEL 7 | bind-dyndb-ldap | 11.1-7.el7_9.1 | RHSA-2024:3741 |
| RHEL 7 | dhcp +4 | 12:4.2.5-83.el7_9.2 | RHSA-2024:3741 |
Show 9 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 9.2 EUS | bind +9 | 32:9.16.23-11.el9_2.4 | RHSA-2024:1803 |
| RHEL 9.2 EUS | bind-dyndb-ldap | 11.9-8.el9_2.2 | RHSA-2024:1803 |
| RHEL 9.0 EUS | bind +8 | 32:9.16.23-1.el9_0.5 | RHSA-2024:1800 |
| RHEL 9.0 EUS | bind-dyndb-ldap | 11.9-7.el9_0.1 | RHSA-2024:1800 |
| RHEL 8.8 EUS | bind +16 | 32:9.11.36-8.el8_8.4 | RHSA-2024:2721 |
| RHEL 8.8 EUS | bind9.16 +8 | 32:9.16.23-0.14.el8_8.4 | RHSA-2024:1648 |
| RHEL 8.8 EUS | dhcp +5 | 12:4.3.6-49.el8_8.1 | RHSA-2024:2721 |
| RHEL 8.6 EUS | bind +16 | 32:9.11.36-3.el8_6.7 | RHSA-2024:2720 |
| RHEL 8.6 EUS | bind9.16 +8 | 32:9.16.23-0.7.el8_6.5 | RHSA-2024:1647 |
| RHEL 8.6 EUS | dhcp +5 | 12:4.3.6-47.el8_6.2 | RHSA-2024:2720 |
| RHEL 8.4 TUS | bind +16 | 32:9.11.26-4.el8_4.4 | RHSA-2024:2821 |
| RHEL 8.4 TUS | dhcp +5 | 12:4.3.6-44.el8_4.3 | RHSA-2024:2821 |
| RHEL 8.4 E4S | bind +16 | 32:9.11.26-4.el8_4.4 | RHSA-2024:2821 |
| RHEL 8.4 E4S | dhcp +5 | 12:4.3.6-44.el8_4.3 | RHSA-2024:2821 |
| RHEL 8.4 AUS | bind +16 | 32:9.11.26-4.el8_4.4 | RHSA-2024:2821 |
| RHEL 8.4 AUS | dhcp +5 | 12:4.3.6-44.el8_4.3 | RHSA-2024:2821 |
| RHEL 8.2 AUS | bind +16 | 32:9.11.13-6.el8_2.7 | RHSA-2024:2890 |
| RHEL 8.2 AUS | dhcp +5 | 12:4.3.6-40.el8_2.3 | RHSA-2024:2890 |
| RHEL 6 ELS | bind +5 | 32:9.8.2-0.68.rc1.el6_10.14 | RHSA-2025:0039 |
| RHEL 6 ELS | bind-dyndb-ldap | 2.3-8.el6_10.1 | RHSA-2025:0039 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 9 | bind +9 | 32:9.16.23-14.el9_3.4 | ALSA-2024:2551, ALSA-2024:1789 |
| AlmaLinux 9 | bind-dyndb-ldap | 11.9-8.el9_3.3.alma.1 | ALSA-2024:2551, ALSA-2024:1789 |
| AlmaLinux 8 | bind +16 | 32:9.11.36-11.el8_9.1 | ALSA-2024:3271, ALSA-2024:1782 |
| AlmaLinux 8 | bind9.16 +8 | 32:9.16.23-0.16.el8_9.2.alma.1 | ALSA-2024:1781 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 9 | bind | 2:9.16.23-18.el9_4.1 | RLSA-2024:2551 |
| Rocky Linux 9 | bind-dyndb-ldap | 11.9-9.el9_4 | RLSA-2024:2551 |
| Rocky Linux 8 | bind | 2:9.11.36-11.el8_9.1 | RLSA-2024:3271, RLSA-2024:1782 |
| Rocky Linux 8 | bind9.16 | 2:9.16.23-0.16.el8_9.2 | RLSA-2024:1781 |
| Rocky Linux 8 | dhcp | 2:4.3.6-49.el8_9.1 | RLSA-2024:3271, RLSA-2024:1782 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP6 | bind | 9.16.6-150300.22.44.1 | SUSE-SU-2024:1982-1 |
| SLES 15 SP5 | bind | 9.16.48-150500.8.16.1 | SUSE-SU-2024:0574-1 |
| SLES 15 SP4 | bind | 9.16.48-150400.5.40.1 | SUSE-SU-2024:0590-1 |
| SLES 15 SP3 | bind | 9.16.6-150300.22.44.1 | SUSE-SU-2024:1982-1 |
| SLES 15 SP2 | bind | 9.16.6-150000.12.74.2 | SUSE-SU-2024:2033-1 |
| SLES 15 SP2 | libuv | 1.18.0-150000.3.2.1 | SUSE-SU-2024:2033-1 |
Show 12 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP5 | bind | 9.11.22-3.52.1 | SUSE-SU-2024:1894-1 |
| SLES for SAP 15 SP4 | bind | 9.16.48-150400.5.40.1 | SUSE-SU-2024:0590-1 |
| SLES for SAP 15 SP3 | bind | 9.16.6-150300.22.44.1 | SUSE-SU-2024:1982-1 |
| SLES for SAP 15 SP2 | bind | 9.16.6-150000.12.74.2 | SUSE-SU-2024:2033-1 |
| SLES for SAP 15 SP2 | libuv | 1.18.0-150000.3.2.1 | SUSE-SU-2024:2033-1 |
| SLES for SAP 12 SP5 | bind | 9.11.22-3.52.1 | SUSE-SU-2024:1894-1 |
| SLE HPC 15 SP4 | bind | 9.16.48-150400.5.40.1 | SUSE-SU-2024:0590-1 |
| SLE HPC 15 SP3 | bind | 9.16.6-150300.22.44.1 | SUSE-SU-2024:1982-1 |
| SLE HPC 15 SP2 | bind | 9.16.6-150000.12.74.2 | SUSE-SU-2024:2033-1 |
| SLE HPC 15 SP2 | libuv | 1.18.0-150000.3.2.1 | SUSE-SU-2024:2033-1 |
| SUSE Manager Server 4.3 | bind | 9.16.48-150400.5.40.1 | SUSE-SU-2024:0590-1 |
| SUSE Manager Proxy 4.3 | bind | 9.16.48-150400.5.40.1 | SUSE-SU-2024:0590-1 |
| SUSE Manager Client Tools for SLE Micro 5 | bind | 9.16.6-150000.12.74.2 | SUSE-SU-2024:2033-1 |
| SUSE Manager Client Tools for SLE Micro 5 | libuv | 1.18.0-150000.3.2.1 | SUSE-SU-2024:2033-1 |
| SUSE Enterprise Storage 7.1 | bind | 9.16.6-150300.22.44.1 | SUSE-SU-2024:1982-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | bind | 9.18.24-1.1 | openSUSE-SU-2024:13687-1 |
| openSUSE Leap 15.5 | bind | 9.16.48-150500.8.16.1 | SUSE-SU-2024:0574-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | bind | 9.18.24-r0 | — |
| Alpine v3.23 | bind | 9.18.24-r0 | — |
| Alpine v3.22 | bind | 9.18.24-r0 | — |
| Alpine v3.21 | bind | 9.18.24-r0 | — |
| Alpine v3.20 | bind | 9.18.24-r0 | — |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | bind | 9.18.24-r0 | — |
| Alpine v3.18 | bind | 9.18.24-r0 | — |
| Alpine v3.17 | bind | 9.18.24-r0 | — |
| Alpine v3.16 | bind | 9.16.48-r0 | — |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | bind +17 | 32:9.16.48-1.amzn2023.0.1 | ALAS2023-2024-550 |
| Amazon Linux 2 | bind +15 | 32:9.11.4-26.P2.amzn2.13.8 | ALAS2-2024-2625 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | bind | 9.19.21-1 | — |
| Azure Linux 2 (CBL-Mariner) | bind | 9.16.48-1 | — |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 9 | bind +9 | 32:9.16.23-14.el9_3.4 | ELSA-2024-2551, ELSA-2024-1789 |
| Oracle Linux 9 | bind-dyndb-ldap | 11.9-8.el9_3.3 | ELSA-2024-2551, ELSA-2024-1789 |
| Oracle Linux 8 | bind +16 | 32:9.11.36-11.el8_9.1 | ELSA-2024-3271, ELSA-2024-1782 |
| Oracle Linux 8 | bind9.16 +8 | 32:9.16.23-0.16.el8_9.2 | ELSA-2024-1781 |
| Oracle Linux 8 | dhcp-libs +4 | 12:4.3.6-49.el8_9.1 | ELSA-2024-3271, ELSA-2024-1782 |
| Oracle Linux 7 | bind +15 | 32:9.11.4-26.P2.el7_9.16 | ELSA-2024-3741 |
| Oracle Linux 7 | bind-dyndb-ldap | 11.1-7.el7_9.1 | ELSA-2024-3741 |
| Oracle Linux 7 | dhcp +4 | 12:4.2.5-83.0.3.el7_9.2 | ELSA-2024-3741 |
Wolfi
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Wolfi rolling | bind | 9.18.24-r0 | — |
Advisories 50
- ALSA-2024:2551 Important: bind security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2024:1789 Important: bind security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2024:1781 Important: bind9.16 security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2024:1782 Important: bind and dhcp security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2024:3271 Important: bind and dhcp security update AlmaLinux Security Advisories · Oct 29, 2026
- WID-SEC-2024-0386 Internet Systems Consortium BIND: Mehrere Schwachstellen ermöglichen Denial of Service BSI CERT-Bund (WID) · Oct 25, 2026
- RHSA-2025:0039 Red Hat Security Advisory: bind and bind-dyndb-ldap security update Red Hat Security Advisories (RHSA) · Sep 20, 2026
- RHSA-2024:2720 Red Hat Security Advisory: bind and dhcp security update Red Hat Security Advisories (RHSA) · Sep 2, 2026
- RHSA-2024:3741 Red Hat Security Advisory: bind, bind-dyndb-ldap, and dhcp security update Red Hat Security Advisories (RHSA) · Aug 7, 2026
- RHSA-2024:3271 Red Hat Security Advisory: bind and dhcp security update Red Hat Security Advisories (RHSA) · Aug 7, 2026
- RHSA-2024:2890 Red Hat Security Advisory: bind and dhcp security update Red Hat Security Advisories (RHSA) · Aug 7, 2026
- RHSA-2024:2821 Red Hat Security Advisory: bind and dhcp security update Red Hat Security Advisories (RHSA) · Aug 7, 2026
- RHSA-2024:2721 Red Hat Security Advisory: bind and dhcp security update Red Hat Security Advisories (RHSA) · Aug 7, 2026
- RHSA-2024:2551 Red Hat Security Advisory: bind security update Red Hat Security Advisories (RHSA) · Aug 7, 2026
- RHSA-2024:1803 Red Hat Security Advisory: bind and bind-dyndb-ldap security updates Red Hat Security Advisories (RHSA) · Aug 7, 2026
- RHSA-2024:1789 Red Hat Security Advisory: bind security update Red Hat Security Advisories (RHSA) · Aug 7, 2026
- RHSA-2024:1800 Red Hat Security Advisory: bind and bind-dyndb-ldap security updates Red Hat Security Advisories (RHSA) · Aug 7, 2026
- RHSA-2024:1782 Red Hat Security Advisory: bind and dhcp security update Red Hat Security Advisories (RHSA) · Aug 7, 2026
- RHSA-2024:1781 Red Hat Security Advisory: bind9.16 security update Red Hat Security Advisories (RHSA) · Aug 7, 2026
- RHSA-2024:1647 Red Hat Security Advisory: bind9.16 security update Red Hat Security Advisories (RHSA) · Aug 7, 2026
- RHSA-2024:1648 Red Hat Security Advisory: bind9.16 security update Red Hat Security Advisories (RHSA) · Aug 7, 2026
- WID-SEC-2024-1226 Red Hat OpenShift: Mehrere Schwachstellen BSI CERT-Bund (WID) · May 11, 2026
- USN-6642-1 bind9 vulnerabilities Ubuntu Security Notices (USN) · Apr 27, 2026
- USN-6633-1 bind9 vulnerabilities Ubuntu Security Notices (USN) · Apr 27, 2026
- DSA-5621-1 bind9 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- RLSA-2024:2551 Important: bind security update Rocky Linux Security Advisories · Feb 5, 2026
- RLSA-2024:3271 Important: bind and dhcp security update Rocky Linux Security Advisories · Feb 4, 2026
- RLSA-2024:1782 Important: bind and dhcp security update Rocky Linux Security Advisories · Feb 4, 2026
- RLSA-2024:1781 Important: bind9.16 security update Rocky Linux Security Advisories · Feb 4, 2026
- SUSE-SU-2024:1894-1 Security update for bind SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:2033-1 Security update for bind SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:0590-1 Security update for bind SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:13687-1 bind-9.18.24-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:1982-1 Security update for bind SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:0574-1 Security update for bind SUSE / openSUSE Security Updates · Feb 4, 2026
- WID-SEC-2024-1307 Red Hat OpenShift Service Mesh Containers: Mehrere Schwachstellen BSI CERT-Bund (WID) · Feb 5, 2025
- NCSC-2025-0021 Kwetsbaarheden verholpen in Oracle Communications NCSC-NL (Netherlands) · Jan 22, 2025
- WID-SEC-2024-1313 IBM QRadar SIEM: Mehrere Schwachstellen BSI CERT-Bund (WID) · Dec 1, 2024
- WID-SEC-2024-1248 Xerox FreeFlow Print Server: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 21, 2024
- NCSC-2024-0433 Kwetsbaarheden verholpen in Siemens producten NCSC-NL (Netherlands) · Nov 12, 2024
- SSA-915275 SSA-915275: Multiple Vulnerabilities in SINEC INS Before V1.0 SP2 Update 3 Siemens ProductCERT · Nov 12, 2024
- ICSA-24-319-08 Siemens SINEC INS CISA ICS & IT advisories · Nov 12, 2024
- ALAS2-2024-2625 Important: bind security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Aug 20, 2024
- ELSA-2024-3741 Important: bind, bind-dyndb-ldap, and dhcp security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Jun 10, 2024
- ELSA-2024-3271 Important: bind and dhcp security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · May 29, 2024
- ELSA-2024-2551 Important: bind security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · May 7, 2024
- ELSA-2024-1781 Important: bind9.16 security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Apr 11, 2024
- ELSA-2024-1789 Important: bind security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Apr 11, 2024
- ELSA-2024-1782 Important: bind and dhcp security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Apr 11, 2024
- ALAS2023-2024-550 Important: bind security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Mar 5, 2024
References
- CVE-2023-4408 vendor-advisory
- http://www.openwall.com/lists/oss-security/2024/02/13/1
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PNNHZSZPG2E7NBMBNYPGHCFI4V4XRWNQ/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/RGS7JN6FZXUSTC2XKQHH27574XOULYYJ/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/HVRDSJVZKMCXKKPP6PNR62T7RWZ3YSDZ/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZDZFMEKQTZ4L7RY46FCENWFB5MDT263R/
- https://security.netapp.com/advisory/ntap-20240426-0001/