Bug 2025662 (CVE-2021-39921, wnpa-sec-2021-14)

Summary:	CVE-2021-39921 wireshark: modbus dissector crash
Product:	[Other] Security Response	Reporter:	Guilherme de Almeida Suckevicz <gsuckevi>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	alekcejk, denis, huzaifas, lemenkov, mruprich, peter, rvokal, sergey.avseyev
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	wireshark 3.4.10	Doc Type:	If docs needed, set a value
Doc Text:	A NULL pointer exception flaw was found in Wireshark. A process failure on crafted or malformed input in the Modbus dissector can cause a denial of service via a packet injection or crafted capture file.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2022-04-18 00:57:47 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:	2025663, 2029891
Bug Blocks:	2025696

Description Guilherme de Almeida Suckevicz 2021-11-22 17:39:39 UTC

NULL pointer exception in the Modbus dissector in Wireshark 3.4.0 to 3.4.9 and 3.2.0 to 3.2.17 allows denial of service via packet injection or crafted capture file.

Reference:
https://www.wireshark.org/security/wnpa-sec-2021-14.html

Comment 1 Guilherme de Almeida Suckevicz 2021-11-22 17:39:56 UTC

Created wireshark tracking bugs for this issue:

Affects: fedora-all [bug 2025663]

Comment 3 devthomp 2021-12-07 16:22:42 UTC

Reproducer:
https://svn.devel.redhat.com/repos/srtvulns/trunk/components/wireshark/CVE-2021-39921/

Comment 10 Product Security DevOps Team 2022-04-18 00:57:45 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-2021-39921