CVE-2021-25215 Denial of service in BIND9
Remote attackers can cause the BIND DNS server to crash by sending specific queries for DNAME records, resulting in a denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2021-25215?
CVE-2021-25215 is a high-severity denial of service vulnerability in Debian Debian Linux, published on 29 Apr 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
In BIND 9.0.0 -> 9.11.29, 9.12.0 -> 9.16.13, and versions BIND 9.9.3-S1 -> 9.11.29-S1 and 9.16.8-S1 -> 9.16.13-S1 of BIND Supported Preview Edition, as well as release versions 9.17.0 -> 9.17.11 of the BIND 9.17 development branch, when a vulnerable version of named receives a query for a record triggering the flaw described above, the named process will terminate due to a failed assertion check. The vulnerability affects all currently maintained BIND 9 branches (9.11, 9.11-S, 9.16, 9.16-S, 9.17) as well as all other versions of BIND 9.
Weakness: CWE-617
Which versions are affected by CVE-2021-25215?
It affects 16 products.
Linux distribution packages (40)
bind Red Hat:enterprise_linux:7::client | All versions | 32:9.11.4-26.P2.el7_9.5 |
bind-chroot Red Hat:enterprise_linux:7::client | All versions | 32:9.11.4-26.P2.el7_9.5 |
bind-debuginfo Red Hat:enterprise_linux:7::client | All versions | 32:9.11.4-26.P2.el7_9.5 |
bind-devel Red Hat:enterprise_linux:7::client | All versions | 32:9.11.4-26.P2.el7_9.5 |
bind-export-devel Red Hat:enterprise_linux:7::client | All versions | 32:9.11.4-26.P2.el7_9.5 |
bind-export-libs Red Hat:enterprise_linux:7::client | All versions | 32:9.11.4-26.P2.el7_9.5 |
bind-libs Red Hat:enterprise_linux:7::client | All versions | 32:9.11.4-26.P2.el7_9.5 |
bind-libs-lite Red Hat:enterprise_linux:7::client | All versions | 32:9.11.4-26.P2.el7_9.5 |
bind-license Red Hat:enterprise_linux:7::client | All versions | 32:9.11.4-26.P2.el7_9.5 |
bind-lite-devel Red Hat:enterprise_linux:7::client | All versions | 32:9.11.4-26.P2.el7_9.5 |
bind-pkcs11 Red Hat:enterprise_linux:7::client | All versions | 32:9.11.4-26.P2.el7_9.5 |
bind-pkcs11-devel Red Hat:enterprise_linux:7::client | All versions | 32:9.11.4-26.P2.el7_9.5 |
bind-pkcs11-libs Red Hat:enterprise_linux:7::client | All versions | 32:9.11.4-26.P2.el7_9.5 |
bind-pkcs11-utils Red Hat:enterprise_linux:7::client | All versions | 32:9.11.4-26.P2.el7_9.5 |
bind-sdb Red Hat:enterprise_linux:7::client | All versions | 32:9.11.4-26.P2.el7_9.5 |
bind-sdb-chroot Red Hat:enterprise_linux:7::client | All versions | 32:9.11.4-26.P2.el7_9.5 |
bind-utils Red Hat:enterprise_linux:7::client | All versions | 32:9.11.4-26.P2.el7_9.5 |
bind Red Hat:enterprise_linux:7::computenode | All versions | 32:9.11.4-26.P2.el7_9.5 |
bind-chroot Red Hat:enterprise_linux:7::computenode | All versions | 32:9.11.4-26.P2.el7_9.5 |
bind-debuginfo Red Hat:enterprise_linux:7::computenode | All versions | 32:9.11.4-26.P2.el7_9.5 |
bind-devel Red Hat:enterprise_linux:7::computenode | All versions | 32:9.11.4-26.P2.el7_9.5 |
bind-export-devel Red Hat:enterprise_linux:7::computenode | All versions | 32:9.11.4-26.P2.el7_9.5 |
bind-lite-devel Red Hat:enterprise_linux:7::computenode | All versions | 32:9.11.4-26.P2.el7_9.5 |
bind-pkcs11 Red Hat:enterprise_linux:7::computenode | All versions | 32:9.11.4-26.P2.el7_9.5 |
bind-pkcs11-devel Red Hat:enterprise_linux:7::computenode | All versions | 32:9.11.4-26.P2.el7_9.5 |
bind-pkcs11-libs Red Hat:enterprise_linux:7::computenode | All versions | 32:9.11.4-26.P2.el7_9.5 |
bind-pkcs11-utils Red Hat:enterprise_linux:7::computenode | All versions | 32:9.11.4-26.P2.el7_9.5 |
bind-sdb Red Hat:enterprise_linux:7::computenode | All versions | 32:9.11.4-26.P2.el7_9.5 |
bind-sdb-chroot Red Hat:enterprise_linux:7::computenode | All versions | 32:9.11.4-26.P2.el7_9.5 |
bind Red Hat:enterprise_linux:7::server | All versions | 32:9.11.4-26.P2.el7_9.5 |
bind-chroot Red Hat:enterprise_linux:7::server | All versions | 32:9.11.4-26.P2.el7_9.5 |
bind-debuginfo Red Hat:enterprise_linux:7::server | All versions | 32:9.11.4-26.P2.el7_9.5 |
bind-devel Red Hat:enterprise_linux:7::server | All versions | 32:9.11.4-26.P2.el7_9.5 |
bind-export-devel Red Hat:enterprise_linux:7::server | All versions | 32:9.11.4-26.P2.el7_9.5 |
bind-export-libs Red Hat:enterprise_linux:7::server | All versions | 32:9.11.4-26.P2.el7_9.5 |
bind-libs Red Hat:enterprise_linux:7::server | All versions | 32:9.11.4-26.P2.el7_9.5 |
bind-libs-lite Red Hat:enterprise_linux:7::server | All versions | 32:9.11.4-26.P2.el7_9.5 |
bind-license Red Hat:enterprise_linux:7::server | All versions | 32:9.11.4-26.P2.el7_9.5 |
bind-lite-devel Red Hat:enterprise_linux:7::server | All versions | 32:9.11.4-26.P2.el7_9.5 |
bind-pkcs11 Red Hat:enterprise_linux:7::server | All versions | 32:9.11.4-26.P2.el7_9.5 |
Products include Debian Debian Linux, Fedoraproject Fedora, Isc Bind, Netapp 500f Firmware, Netapp A250 Firmware, Netapp Active Iq Unified Manager and 10 more.
How do I fix CVE-2021-25215?
Upgrade to a fixed version.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2021-25215 being exploited?
There is no known exploitation of CVE-2021-25215 in the wild and no public exploit code.
Other vulnerabilities in Debian Debian Linux
Sources
Also known as ALPINE-CVE-2021-25215, DEBIAN-CVE-2021-25215, GHSA-r4mp-379r-9756, RHSA-2021:1468, RHSA-2021:1469, RHSA-2021:1475 and 9 more.