Bug 1667592 (CVE-2019-5719)

Summary:	CVE-2019-5719 wireshark: ISAKMP dissector crash in epan/dissectors/packet-isakmp.c
Product:	[Other] Security Response	Reporter:	Laura Pardo <lpardo>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED WONTFIX	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	mruprich
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	wireshark 2.6.6, wireshark 2.4.12	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-06-29 20:56:05 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:	1667593, 1686923
Bug Blocks:	1667594

Description Laura Pardo 2019-01-18 22:00:41 UTC

In Wireshark 2.6.0 to 2.6.5 and 2.4.0 to 2.4.11, the ISAKMP dissector could crash. This was addressed in epan/dissectors/packet-isakmp.c by properly handling the case of a missing decryption data block.


References:
https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=15374
https://www.wireshark.org/security/wnpa-sec-2019-04.html

Upstream Patch:
https://code.wireshark.org/review/gitweb?p=wireshark.git;a=commit;h=b5b02f2a9b8772d8814096f86c60a32889d61f2c

Comment 1 Laura Pardo 2019-01-18 22:00:51 UTC

Created wireshark tracking bugs for this issue:

Affects: fedora-all [bug 1667593]

Comment 3 Riccardo Schirone 2019-03-08 16:41:59 UTC

Function dissect_transform() in packet-isakmp.c has a NULL pointer dereference flaw. The `decr` parameter may be NULL, but it is dereferenced without any check, thus leading to a crash.