CVE-2021-25214

In BIND 9.8.5 -> 9.8.8, 9.9.3 -> 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 9 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 malformed IXFR triggering the flaw described above, the named process will terminate due to a failed assertion the next time the transferred secondary zone is refreshed.

• CWE-617

• https://www.openwall.com/lists/oss-security/2021/04/29/1Mailing List, Third Party Advisory
• https://www.openwall.com/lists/oss-security/2021/04/29/2Mailing List, Third Party Advisory
• https://www.openwall.com/lists/oss-security/2021/04/29/3Mailing List, Third Party Advisory
• https://www.openwall.com/lists/oss-security/2021/04/29/4Mailing List, Third Party Advisory
• https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdfPatch, Third Party Advisory
• https://kb.isc.org/v1/docs/cve-2021-25214Vendor Advisory
• https://lists.debian.org/debian-lts-announce/2021/05/msg00001.htmlMailing List, Third Party Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VEC2XG4Q2ODTN2C4CGXEIXU3EUTBMK7L/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZDSRPCJQ7MZC6CENH5PO3VQOFI7VSWBE/
• https://security.netapp.com/advisory/ntap-20210521-0006/Third Party Advisory
• https://www.debian.org/security/2021/dsa-4909Third Party Advisory
• https://www.openwall.com/lists/oss-security/2021/04/29/1Mailing List, Third Party Advisory
• https://www.openwall.com/lists/oss-security/2021/04/29/2Mailing List, Third Party Advisory
• https://www.openwall.com/lists/oss-security/2021/04/29/3Mailing List, Third Party Advisory
• https://www.openwall.com/lists/oss-security/2021/04/29/4Mailing List, Third Party Advisory
• https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdfPatch, Third Party Advisory
• https://kb.isc.org/v1/docs/cve-2021-25214Vendor Advisory
• https://lists.debian.org/debian-lts-announce/2021/05/msg00001.htmlMailing List, Third Party Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VEC2XG4Q2ODTN2C4CGXEIXU3EUTBMK7L/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZDSRPCJQ7MZC6CENH5PO3VQOFI7VSWBE/
• https://security.netapp.com/advisory/ntap-20210521-0006/Third Party Advisory
• https://www.debian.org/security/2021/dsa-4909Third Party Advisory

Published

Apr 29, 2021

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2021-25208Arbitrary file upload vulnerability in SourceCodester Travel…9.8
• CVE-2021-25209SQL injection vulnerability in SourceCodester Theme Park Tic…9.8
• CVE-2021-25210Arbitrary file upload vulnerability in SourceCodester Alumni…9.8
• CVE-2021-25211Arbitrary file upload vulnerability in SourceCodester Orderi…9.8
• CVE-2021-25212SQL injection vulnerability in SourceCodester Alumni Managem…9.8
• CVE-2021-25213SQL injection vulnerability in SourceCodester Travel Managem…9.8
• CVE-2021-25215In BIND 9.0.0 -> 9.11.29, 9.12.0 -> 9.16.13, and versions BI…7.5
• CVE-2021-25216In BIND 9.5.0 -> 9.11.29, 9.12.0 -> 9.16.13, and versions BI…9.8
• CVE-2021-25217In ISC DHCP 4.1-ESV-R1 -> 4.1-ESV-R16, ISC DHCP 4.4.0 -> 4.4…7.4
• CVE-2021-25218In BIND 9.16.19, 9.17.16. Also, version 9.16.19-S1 of BIND S…7.5
• CVE-2021-25219In BIND 9.3.0 -> 9.11.35, 9.12.0 -> 9.16.21, and versions 9.…5.3
• CVE-2021-25220BIND 9.11.0 -> 9.11.36 9.12.0 -> 9.16.26 9.17.0 -> 9.18.0 BI…6.8