Security readout for executives and security teams
This flaw can make affected BIND DNS servers crash, causing DNS service disruption. It is narrow: only BIND 9.16.19, 9.17.16, and 9.16.19-S1 are listed, and the condition involves RRL with UDP responses that require fragmentation. Exposure is limited to organizations running the exact affected BIND versions with RRL enabled, especially DNS services reachable by untrusted networks. Systems on other BIND versions are not identified as affected in the supplied sources. Treat as a high-priority availability risk for DNS infrastructure. It is not a data theft issue, but DNS outages can affect applications, email, and customer access. Patch confirmed exposed systems promptly. Mitigation focus: Check ISC and OS vendor advisories for fixed BIND packages.; Upgrade affected BIND installations according to vendor guidance.; Prioritize internet-facing DNS servers using RRL..
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
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ATT&CK lookup starting points
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CVE-2021-25218 mapping review
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Open ATT&CK lookup- Severity
- High
- CVSS
- 7.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CNA and ADP enrichment extracted from CVE v5
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CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H3.93.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.5HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://kb.isc.org/v1/docs/cve-2021-25218CVE reference · x_refsource_CONFIRM
- FEDORA-2021-fbb258debfCVE reference · vendor-advisory, x_refsource_FEDORA
- https://security.netapp.com/advisory/ntap-20210909-0002/CVE reference · x_refsource_CONFIRM
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.