Bug 519266 (CVE-2008-7068)

Summary:	CVE-2008-7068 php: dba_replace() file corruption vulnerability
Product:	[Other] Security Response	Reporter:	Vincent Danen <vdanen>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	jorton
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
URL:	http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2008-7068
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2009-08-25 21:42:15 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 Vincent Danen 2009-08-25 21:07:56 UTC

Common Vulnerabilities and Exposures assigned an identifier CVE-2008-7068 to
the following vulnerability:

Name: CVE-2008-7068
URL: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-7068
Assigned: 20090824
Reference: SREASONRES:20081127 PHP 5.2.6 dba_replace() destroying file
Reference: URL: http://securityreason.com/achievement_securityalert/58
Reference: BUGTRAQ:20081127 SecurityReason : PHP 5.2.6 dba_replace() destroying file
Reference: URL: http://www.securityfocus.com/archive/1/archive/1/498746/100/0/threaded
Reference: BUGTRAQ:20081206 Re: SecurityReason : PHP 5.2.6 dba_replace() destroying file
Reference: URL: http://www.securityfocus.com/archive/1/498981/100/0/threaded
Reference: BUGTRAQ:20081206 Re: SecurityReason : PHP 5.2.6 dba_replace() destroying file
Reference: URL: http://www.securityfocus.com/archive/1/498982/100/0/threaded
Reference: CONFIRM: http://cvs.php.net/viewvc.cgi/php-src/NEWS?r1=1.2027.2.547.2.1313&r2=1.2027.2.547.2.1314&
Reference: OSVDB:52206
Reference: URL: http://www.osvdb.org/52206
Reference: XF:php-dbareplace-file-corruption(47316)
Reference: URL: http://xforce.iss.net/xforce/xfdb/47316

The dba_replace function in PHP 5.2.6 and 4.x allows context-dependent
attackers to cause a denial of service (file truncation) via a key
with the NULL byte.  NOTE: this might only be a vulnerability in
limited circumstances in which the attacker can modify or add database
entries but does not have permissions to truncate the file.

Comment 1 Vincent Danen 2009-08-25 21:34:12 UTC

This is not a security issue.  A user with read and write access to a file can reasonably be expected to manipulate the contents of the file, including truncating it.  Instead of using dba_replace(), a user could simply fopen() the file in write mode and write an empty string to it, which provides the same end-result.

Comment 2 Vincent Danen 2009-08-25 21:45:19 UTC

For posterity, the patch to fix this issue is here: http://cvs.php.net/viewvc.cgi/php-src/ext/dba/libinifile/inifile.c?r1=1.14.2.1.2.4&r2=1.14.2.1.2.5&view=patch

Comment 3 Tomas Hoger 2009-08-27 08:02:22 UTC

Further discussion about the issue:
  http://thread.gmane.org/gmane.comp.security.oss.general/1438