high
7.5
CWE
617
Advisory Published
CVE Published
Updated

CVE-2021-25215: An assertion check can fail while answering queries for DNAME records that require the DNAME to be processed to resolve itself

First published: Wed Apr 28 2021(Updated: )

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.

Credit: security-officer@isc.org

Affected SoftwareAffected VersionHow to fix
debian/bind9<=1:9.11.5.P4+dfsg-5.1+deb10u3<=1:9.11.5.P4+dfsg-5.1<=1:9.16.13-1
1:9.11.5.P4+dfsg-5.1+deb10u5
1:9.16.15-1
IBM Cloud Pak for Security (CP4S)<=1.7.2.0
IBM Cloud Pak for Security (CP4S)<=1.7.1.0
IBM Cloud Pak for Security (CP4S)<=1.7.0.0
debian/bind9
1:9.11.5.P4+dfsg-5.1+deb10u7
1:9.11.5.P4+dfsg-5.1+deb10u9
1:9.16.44-1~deb11u1
1:9.18.19-1~deb12u1
1:9.19.17-1
Debian Debian Linux=9.0
Debian Debian Linux=10.0
ISC BIND>=9.0.0<9.11.31
ISC BIND>=9.12.0<9.16.15
ISC BIND>=9.17.0<9.17.12
ISC BIND=9.9.3-s1
ISC BIND=9.9.12-s1
ISC BIND=9.9.13-s1
ISC BIND=9.10.5-s1
ISC BIND=9.10.7-s1
ISC BIND=9.11.3-s1
ISC BIND=9.11.5-s3
ISC BIND=9.11.5-s5
ISC BIND=9.11.5-s6
ISC BIND=9.11.6-s1
ISC BIND=9.11.7-s1
ISC BIND=9.11.8-s1
ISC BIND=9.11.12-s1
ISC BIND=9.11.21-s1
ISC BIND=9.11.27-s1
ISC BIND=9.11.29-s1
ISC BIND=9.16.8-s1
ISC BIND=9.16.11-s1
ISC BIND=9.16.13-s1
Fedoraproject Fedora=33
Fedoraproject Fedora=34
Netapp Active Iq Unified Manager Vmware Vsphere
Netapp Cloud Backup
Netapp H300s Firmware
Netapp H300s
Netapp H500s Firmware
Netapp H500s
Netapp H700s Firmware
Netapp H700s
Netapp H300e Firmware
Netapp H300e
Netapp H500e Firmware
Netapp H500e
Netapp H700e Firmware
Netapp H700e
Netapp H410s Firmware
Netapp H410s
Netapp A250 Firmware
Netapp A250
Netapp 500f Firmware
Netapp 500f
Oracle Tekelec Platform Distribution>=7.4.0<=7.7.1
Siemens Sinec Infrastructure Network Services<1.0.1.1

Remedy

https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf

Remedy

https://www.oracle.com/security-alerts/cpuoct2021.html

Remedy

Upgrade to the patched release most closely related to your current version of BIND: BIND 9.11.31 BIND 9.16.15 BIND 9.17.12 BIND Supported Preview Edition is a special feature preview branch of BIND provided to eligible ISC support customers. BIND 9.11.31-S1 BIND 9.16.15-S1

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • What is the vulnerability ID of this ISC BIND vulnerability?

    The vulnerability ID of this ISC BIND vulnerability is CVE-2021-25215.

  • What is the severity level of CVE-2021-25215?

    CVE-2021-25215 has a severity level of high.

  • Which versions of BIND are affected by CVE-2021-25215?

    Versions 9.0.0 to 9.11.29, 9.12.0 to 9.16.13, 9.9.3-S1 to 9.11.29-S1, 9.16.8-S1 to 9.16.13-S1, and 9.17.0 to 9.17.11 of BIND are affected by CVE-2021-25215.

  • How can I fix the CVE-2021-25215 vulnerability?

    To fix the CVE-2021-25215 vulnerability, upgrade to BIND version 9.11.5.P4+dfsg-5.1+deb10u7, 9.11.5.P4+dfsg-5.1+deb10u9, 9.16.44-1~deb11u1, 9.18.19-1~deb12u1, or 9.19.17-1.

  • Are there any references I can check for more information about CVE-2021-25215?

    Yes, you can check the following references for more information about CVE-2021-25215: [1](http://www.openwall.com/lists/oss-security/2021/04/29/1), [2](http://www.openwall.com/lists/oss-security/2021/04/29/2), [3](http://www.openwall.com/lists/oss-security/2021/04/29/3).

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