CVE-2022-3924

2023-01-2500:00:00

ubuntu.com

7.5 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

5 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:N/AC:L/Au:N/C:N/I:N/A:P

0.001 Low

EPSS

Percentile

34.0%

JSON

This issue can affect BIND 9 resolvers with stale-answer-enable yes; that
also make use of the option stale-answer-client-timeout, configured with
a value greater than zero. If the resolver receives many queries that
require recursion, there will be a corresponding increase in the number of
clients that are waiting for recursion to complete. If there are sufficient
clients already waiting when a new client query is received so that it is
necessary to SERVFAIL the longest waiting client (see BIND 9 ARM
recursive-clients limit and soft quota), then it is possible for a race
to occur between providing a stale answer to this older client and sending
an early timeout SERVFAIL, which may cause an assertion failure. This issue
affects BIND 9 versions 9.16.12 through 9.16.36, 9.18.0 through 9.18.10,
9.19.0 through 9.19.8, and 9.16.12-S1 through 9.16.36-S1.

Notes

Author	Note
alexmurray	As of isc-dhcp-4.4.3-1, isc-dhcp vendors bind9 libs
mdeslaur	This issue was introduced in 9.16.12

OSVersionArchitecturePackageVersionFilename
ubuntu22.04noarchbind9< 1:9.18.1-1ubuntu1.3UNKNOWN
ubuntu22.10noarchbind9< 1:9.18.4-2ubuntu2.1UNKNOWN
ubuntu23.04noarchbind9< 1:9.18.11-2ubuntu1UNKNOWN