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CVE-2021-25214 BIND

Affected softwareBIND
Severity6.5 Medium CVSS 3.1 3 scores
WeaknessCWE-617
Published29 Apr 2021
Updated17 Jun 2026

Description

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.

Exploitation status

No public exploit

No exploit has been reported in the sources we check. Published 5 years ago.

  • CISA KEV not listed
  • VulnCheck KEV not listed
  • CISA Vulnrichment no assessment published
  • Indexed PoC none indexed
  • EPSS 6.4% chance in 30 days

Waratek protection

Outside Waratek scope

A Java vulnerability, but not one Waratek protects. It affects only Java on a user's desktop (applets, Web Start, JavaFX, the installer), sits in a product the Waratek agent can't be installed into, or is in a package we don't expect in business applications. The decision below says which.

  • Protection none
  • Action not pursued none
  • Review human Researcher
  • Record active
Decided by Manual classification of this CVE in the legacy dataset
Finding A manual classification set this CVE's status to Outside Waratek scope, but the CVE names a tracked product.

CVSS

6.5 MEDIUM v3.1 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H 3 metrics

We show the highest score from the newest CVSS version. Scores from different versions can't be compared, and the first score listed is sometimes a 0.0 placeholder.

VersionScoreBandVectorAssignerType
CVSS 3.1 6.5 MEDIUM CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H security-officer@isc.org Secondary published
CVSS 3.1 6.5 MEDIUM CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H NVD Primary
CVSS 2.0 4.0 none AV:N/AC:L/Au:S/C:N/I:N/A:P NVD Primary

Affected software and releases

Products and versions

15 products, 39 version entries
SourceVendorProductSchemeAffected versions
nvd debian debian linux generic 9.0 · 10.0
nvd fedoraproject fedora generic 33 · 34
nvd isc bind generic ≥ 9.8.5 and ≤ 9.8.8 · ≥ 9.9.3 and < 9.11.31 · 9.9.3:s1 · 9.9.12:s1 · 9.9.13:s1 · 9.10.5:s1 · 9.10.7:s1 · 9.11.3:s1 · 9.11.5:s3 · 9.11.5:s5 · 9.11.5:s6 · 9.11.6:s1 · 9.11.7:s1 · 9.11.8:s1 · 9.11.12:s1 · 9.11.21:s1 · 9.11.27:s1 · 9.11.29:s1 · ≥ 9.12.0 and < 9.16.15 · 9.16.8:s1 · 9.16.11:s1 · 9.16.13:s1 · ≥ 9.17.0 and < 9.17.12
nvd netapp active iq unified manager generic any version
nvd netapp aff 500f firmware generic any version
nvd netapp aff a250 firmware generic any version
nvd netapp cloud backup generic any version
nvd netapp h300e firmware generic any version
nvd netapp h300s firmware generic any version
nvd netapp h410s firmware generic any version
nvd netapp h500e firmware generic any version
nvd netapp h500s firmware generic any version
nvd netapp h700e firmware generic any version
nvd netapp h700s firmware generic any version
nvd siemens sinec infrastructure network services generic < 1.0.1.1

References

URLTags
http://www.openwall.com/lists/oss-security/2021/04/29/1 Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/04/29/2 Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/04/29/3 Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/04/29/4 Mailing List, Third Party Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf Patch, Third Party Advisory
https://kb.isc.org/v1/docs/cve-2021-25214 Vendor Advisory
https://lists.debian.org/debian-lts-announce/2021/05/msg00001.html Mailing 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

Timeline

Published2021-04-29By the CVE Program.
NVD record modified2026-06-17NVD's own last-modified date for this record.