Is CVE-2021-25219 actively exploited?

CVE-2021-25219 has no public evidence of in-the-wild exploitation as of 2024-11-21.

What is the CVSS score for CVE-2021-25219?

CVE-2021-25219 has a CVSS score of 5.3 (MEDIUM severity). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.

How do I patch CVE-2021-25219?

Patch guidance is available from isc security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2021-25219.

Which products are affected by CVE-2021-25219?

43 products: isc bind, isc bind, isc bind, isc bind, isc bind, and 38 more.

CVE-2021-25219 - remediation guidance & executive summary

Description

In BIND 9.3.0 -> 9.11.35, 9.12.0 -> 9.16.21, and versions 9.9.3-S1 -> 9.11.35-S1 and 9.16.8-S1 -> 9.16.21-S1 of BIND Supported Preview Edition, as well as release versions 9.17.0 -> 9.17.18 of the BIND 9.17 development branch, exploitation of broken authoritative servers using a flaw in response processing can cause degradation in BIND resolver performance. The way the lame cache is currently designed makes it possible for its internal data structures to grow almost infinitely, which may cause significant delays in client query processing.

CVSS Metrics

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Attack Vector: network
Complexity: low
Privileges: none
User Action: none
Scope: unchanged
Confidentiality: none
Integrity: none
Availability: low
Weaknesses: NVD-CWE-noinfo

Metadata

Primary Vendor: ISC
Published: 10/27/2021
Last Modified: 11/21/2024
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

Affected Products

isc : bindisc : bindisc : bindisc : bindisc : bindisc : bindisc : bindisc : bindisc : bindisc : bindisc : bindisc : bindisc : bindisc : bindisc : bindisc : bindisc : bindisc : bindisc : bindisc : bindisc : bindisc : bindisc : bindisc : binddebian : debian_linuxdebian : debian_linuxdebian : debian_linuxfedoraproject : fedorafedoraproject : fedorafedoraproject : fedoranetapp : h300s_firmwarenetapp : h500s_firmwarenetapp : h700s_firmwarenetapp : h300e_firmwarenetapp : h500e_firmwarenetapp : h700e_firmwarenetapp : h410s_firmwarenetapp : h410c_firmwarenetapp : cloud_backupsiemens : sinec_infrastructure_network_servicesoracle : http_serveroracle : http_serveroracle : zfs_storage_appliance_kit

Remediation Guidance

Executive Summary

View on NIST NVD