CVEvulnerability

CVE-2021-25219

5.3 MEDIUM Published 2021-10-27 Modified 2026-06-17 Official page ↗
Status
Modified
Published
2021-10-27
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
5.3 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
CVSS 3.1 ([email protected])
5.3 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
CVSS 2.0 ([email protected])
5.0 MEDIUM — AV:N/AC:L/Au:N/C:N/I:N/A:P

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.

Affected configurations

• isc bind (>= 9.3.0 < 9.11.36) • isc bind (>= 9.12.0 < 9.16.22) • isc bind (>= 9.17.0 < 9.17.19) • isc bind 9.9.3 • isc bind 9.9.12 • isc bind 9.9.13 • isc bind 9.10.5 • isc bind 9.10.7 • isc bind 9.11.3 • isc bind 9.11.5 • isc bind 9.11.6 • isc bind 9.11.7 • isc bind 9.11.8 • isc bind 9.11.12 • isc bind 9.11.21 • isc bind 9.11.27 • isc bind 9.11.29 • isc bind 9.11.35 • isc bind 9.16.8 • isc bind 9.16.11 • isc bind 9.16.13 • isc bind 9.16.21 • debian debian linux 9.0 • debian debian linux 10.0 • debian debian linux 11.0 • fedoraproject fedora 33 • fedoraproject fedora 34 • fedoraproject fedora 35 • netapp h300s firmware • netapp h500s firmware • netapp h700s firmware • netapp h300e firmware • netapp h500e firmware • netapp h700e firmware • netapp h410s firmware • netapp h410c firmware • netapp cloud backup • siemens sinec infrastructure network services (< 1.0.1.1) • oracle http server 12.2.1.3.0 • oracle http server 12.2.1.4.0 • oracle zfs storage appliance kit 8.8

References