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Bug 216958

Summary:	CVE-2006-5823 zlib_inflate memory corruption
Product:	Red Hat Enterprise Linux 4	Reporter:	Marcel Holtmann <holtmann>
Component:	kernel	Assignee:	Eric Sandeen <esandeen>
Status:	CLOSED ERRATA	QA Contact:	Brian Brock <bbrock>
Severity:	low	Docs Contact:
Priority:	medium
Version:	4.0	CC:	jbaron, security-response-team
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:	impact=low,source=internet,reported=20061107,public=20061107
Fixed In Version:	RHSA-2007-0014	Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2007-01-30 14:42:53 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:

Description Marcel Holtmann 2006-11-22 21:40:47 UTC

From MOKB-07-11-2006:

http://projects.info-pull.com/mokb/MOKB-07-11-2006.html

Linux 2.6.x zlib_inflate function can be abused by filesystems that depend on
zlib compression, such as cramfs. A failure to handle crafted data, result of a
read operation in a corrupted filesystem stream, may lead to memory corruption.
This particular vulnerability requires a filesystem (proof of concept for cramfs
provided) to fail validation (ex. no integrity checking) of the binary stream in
order to reach execution of zlib_inflate().

Comment 2 Jason Baron 2006-12-13 19:05:07 UTC

committed in stream U5 build 42.31. A test kernel with this patch is available
from http://people.redhat.com/~jbaron/rhel4/

Comment 3 Jason Baron 2006-12-18 21:49:46 UTC

committed in stream E5 build 42.0.4

Comment 5 Mike Gahagan 2007-01-17 22:49:35 UTC

verified with 42.0.6 using fsfuzzer

Comment 7 Red Hat Bugzilla 2007-01-30 14:42:54 UTC

An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on the solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.

http://rhn.redhat.com/errata/RHSA-2007-0014.html