Bug 1234887 (CVE-2015-4646)

Summary:	CVE-2015-4646 squashfs-tools: stack overflow in read_fragment_table_4 due to fix for CVE-2015-4645
Product:	[Other] Security Response	Reporter:	Vasyl Kaigorodov <vkaigoro>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED WONTFIX	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	bruno, carnil, jarod, jrusnack, peterm, tcallawa
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2015-10-09 21:01:45 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:	1234888
Bug Blocks:	1234889

Description Vasyl Kaigorodov 2015-06-23 12:57:53 UTC

After applying CVE-2015-4645 fix, squashfs-tools become vulnerable to stack overflow issue - the stack VLA allocation of fragment_table_index[] can easily exceed RLIMIT_STACK.

Upstream bug report: https://github.com/devttys0/sasquatch/pull/5
Upstream fix: https://github.com/gcanalesb/sasquatch/commit/6777e08cc38bc780d27c69c1d8c272867b74524f

Comment 1 Vasyl Kaigorodov 2015-06-23 12:58:33 UTC

Created squashfs-tools tracking bugs for this issue:

Affects: fedora-all [bug 1234888]