Bug 1427944 (CVE-2017-6349)

Summary:	CVE-2017-6349 vim: Integer overflow at a u_read_undo memory allocation site
Product:	[Other] Security Response	Reporter:	Andrej Nemec <anemec>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	gchamoul, karsten, moshima.web, sardella, zdohnal
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	vim 8.0.0378	Doc Type:	If docs needed, set a value
Doc Text:	An integer overflow flaw was found in the way vim handled undo files. This bug could result in vim crashing when trying to process corrupted undo files.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2017-03-06 07:17:20 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:
Bug Blocks:	1427946

Description Andrej Nemec 2017-03-01 14:55:33 UTC

An integer overflow at a u_read_undo memory allocation site would occur for vim, as it does not properly validate values for tree length when reading a corrupted undo file, which may lead to resultant buffer overflows.

Upstream bug:

https://groups.google.com/forum/#!topic/vim_dev/QPZc0CY9j3Y

Upstream patch:

https://github.com/vim/vim/commit/3eb1637b1bba19519885dd6d377bd5596e91d22c