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CVE-2021-25219

CVE.org · Published

Historical CVEsJSONAI instructions

Record status
Published
Identifier year (not publication year)
2021
Source publication
Source updated
Imported by cveboard
Source snapshot
cve_2026-10-24_midnight_baseline ·

Plain text

CNA source text (English)

Lame cache can be abused to severely degrade resolver performance

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.

Scoped product and version facts

Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.

Exploitation unknown; this catalogue does not assess exploitation.

BIND9

Vendor
ISC
Product
BIND9
Platforms
Unknown
Default status
Unknown
BIND9 · Scoped product and version facts
Version (version)Status (status)Version scheme (versionType)Exclusive end (lessThan)Inclusive end (lessThanOrEqual)Status changes (at → status)
Open Source Branches 9.3 through 9.11 9.3.0 through versions before 9.11.36affectedUnavailableUnavailableUnavailableNone listed
Open Source Branches 9.12 through 9.16 9.12.0 through versions before 9.16.22affectedUnavailableUnavailableUnavailableNone listed
Supported Preview Branches 9.9-S through 9.11-S 9.9.3-S1 through versions before 9.11.36-S1affectedUnavailableUnavailableUnavailableNone listed
Supported Preview Branch 9.16-S 9.16.8-S1 through versions before 9.16.22-S1affectedUnavailableUnavailableUnavailableNone listed
Development Branch 9.17 9.17.0 through versions before 9.17.19affectedUnavailableUnavailableUnavailableNone listed