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CVE PROGRAM SOURCE RECORD5.3 Medium

CVE-2021-25219

Lame cache can be abused to severely degrade resolver performance

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Status
Published
Published
Updated
Assigning organization
isc

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 products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

ISC BIND9

  • Open Source Branches 9.3 through 9.11 9.3.0 through versions before 9.11.36affected
  • Open Source Branches 9.12 through 9.16 9.12.0 through versions before 9.16.22affected
  • Supported Preview Branches 9.9-S through 9.11-S 9.9.3-S1 through versions before 9.11.36-S1affected
  • Supported Preview Branch 9.16-S 9.16.8-S1 through versions before 9.16.22-S1affected
  • Development Branch 9.17 9.17.0 through versions before 9.17.19affected

References