vulnerability

Oracle Linux: CVE-2021-25219: ELSA-2022-2092: bind security, bug fix, and enhancement update (MODERATE)

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Severity
5
CVSS
(AV:N/AC:L/Au:N/C:N/I:N/A:P)
Published
Oct 27, 2021
Added
May 18, 2022
Modified
Dec 3, 2025

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.
A flaw was found in the way bind processes broken responses from authoritative servers. This caching mechanism could be abused by an attacker to significantly degrade resolver performance.

Solutions

oracle-linux-upgrade-bindoracle-linux-upgrade-bind-chrootoracle-linux-upgrade-bind-develoracle-linux-upgrade-bind-export-develoracle-linux-upgrade-bind-export-libsoracle-linux-upgrade-bind-libsoracle-linux-upgrade-bind-libs-liteoracle-linux-upgrade-bind-licenseoracle-linux-upgrade-bind-lite-develoracle-linux-upgrade-bind-pkcs11oracle-linux-upgrade-bind-pkcs11-develoracle-linux-upgrade-bind-pkcs11-libsoracle-linux-upgrade-bind-pkcs11-utilsoracle-linux-upgrade-bind-sdboracle-linux-upgrade-bind-sdb-chrootoracle-linux-upgrade-bind-utilsoracle-linux-upgrade-python3-bind

References

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