Bug 2164039 (CVE-2022-3924)

Summary:	CVE-2022-3924 bind: sending specific queries to the resolver may cause a DoS
Product:	[Other] Security Response	Reporter:	Marian Rehak <mrehak>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	mosvald, pemensik, security-response-team
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	bind 9.16.37, bind 9.18.11, bind 9.19.9	Doc Type:	If docs needed, set a value
Doc Text:	A flaw was found in Bind. When resolver receives many queries requiring recursion, there will be a corresponding increase in the number of clients waiting for recursion to complete. This may, under certain conditions, lead to an assertion failure and a denial of service.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2023-05-16 16:33:55 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	2164398, 2164399, 2164406, 2164508
Bug Blocks:	2164033

Description Marian Rehak 2023-01-24 14:56:55 UTC

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.

Comment 3 Marian Rehak 2023-01-25 16:03:22 UTC

Created bind tracking bugs for this issue:

Affects: fedora-all [bug 2164508]

Comment 4 errata-xmlrpc 2023-05-09 07:23:42 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2023:2261 https://access.redhat.com/errata/RHSA-2023:2261

Comment 5 errata-xmlrpc 2023-05-16 08:12:38 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2023:2792 https://access.redhat.com/errata/RHSA-2023:2792

Comment 6 Product Security DevOps Team 2023-05-16 16:33:52 UTC

This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2022-3924