Bug 2064513 (CVE-2022-0396)

Summary:	CVE-2022-0396 bind: DoS from specifically crafted TCP packets
Product:	[Other] Security Response	Reporter:	TEJ RATHI <trathi>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	anon.amish, dns-sig, jorton, mosvald, mruprich, pavel, pemensik, security-response-team, suwu, tcrider, vonsch, yozone, zdohnal
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	bind 9.16.27, bind 9.18.1	Doc Type:	If docs needed, set a value
Doc Text:	A flaw was found in Bind that incorrectly handles certain crafted TCP streams. The vulnerability allows TCP connection slots to be consumed for an indefinite time frame via a specifically crafted TCP stream sent from a client. This flaw allows a remote attacker to send specially crafted TCP streams with 'keep-response-order' enabled that could cause connections to BIND to remain in CLOSE_WAIT status for an indefinite period, even after the client has terminated the connection. This issue results in BIND consuming resources, leading to a denial of service.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2022-12-06 02:20:51 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:	2068478, 2068487, 2068488
Bug Blocks:	2064517

Description TEJ RATHI 2022-03-16 04:42:11 UTC

ISC recently discovered an issue in BIND that allows TCP connection slots to be consumed for an indefinite time frame via a specifically crafted TCP stream sent from a client. This issue is present in BIND 9.16.11 to 9.16.26 (including S editions), and 9.18.0.

This issue can only be triggered on BIND servers which have keep-response-order enabled, which is not the default configuration. The keep-response-order option is an ACL block, and as such, any hosts specified within it will be able to trigger this issue on affected.

Comment 1 Petr Menšík 2022-03-17 10:35:00 UTC

bind package in RHEL9 and bind9.16 package in RHEL8 is affected. Of course also Fedora 34-37 is affected too

Comment 3 TEJ RATHI 2022-03-25 12:51:23 UTC

Created bind tracking bugs for this issue:

Affects: fedora-all [bug 2068478]

Comment 7 errata-xmlrpc 2022-11-08 09:59:24 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2022:7643 https://access.redhat.com/errata/RHSA-2022:7643

Comment 8 errata-xmlrpc 2022-11-15 10:09:10 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2022:8068 https://access.redhat.com/errata/RHSA-2022:8068

Comment 9 Product Security DevOps Team 2022-12-06 02:20:49 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-2022-0396