CVE-2021-25219

Severity

53%

Complexity

39%

Confidentiality

23%

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 3.1 Base Score 5.3. CVSS Attack Vector: network. CVSS Attack Complexity: low. CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L).

CVSS 2.0 Base Score 5. CVSS Attack Vector: network. CVSS Attack Complexity: low. CVSS Vector: (AV:N/AC:L/Au:N/C:N/I:N/A:P).

Overview

First reported 3 years ago

2021-10-27 21:15:00

Last updated 3 years ago

2021-11-28 23:31:00

Affected Software

ISC BIND 9.9.3 S1 Supported Preview Edition

9.9.3

ISC BIND 9.10.5 S1 Supported Preview Edition

9.10.5

ISC BIND 9.10.7 S1 Supported Preview Edition

9.10.7

ISC BIND 9.11.3 S1 Supported Preview Edition

9.11.3

ISC BIND 9.11.5 S3 Supported Preview Edition

9.11.5

ISC BIND 9.11.5 S5 Supported Preview Edition

9.11.5

ISC BIND 9.11.6 S1 Supported Preview Edition

9.11.6

ISC BIND 9.11.7 S1 Supported Preview Edition

9.11.7

Debian Linux 9.0

9.0

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