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ESB-2005.0286 -- SCOSA-2005.11 -- SCO OpenServer cscope: local attacker can overwrite arbitrary files

Date: 08 April 2005
References: ESB-2004.0790  

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===========================================================================
             AUSCERT External Security Bulletin Redistribution

                      ESB-2005.0286 -- SCOSA-2005.11
    SCO OpenServer cscope: local attacker can overwrite arbitrary files
                               8 April 2005

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           cscope
Publisher:         SCO
Operating System:  SCO OpenServer 5.0.6 and 5.0.7
Impact:            Overwrite Arbitrary Files
                   Increased Privileges
Access:            Existing Account
CVE Names:         CAN-2004-0996

Ref:               ESB-2004.0790

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______________________________________________________________________________

			SCO Security Advisory

Subject:		OpenServer 5.0.6 OpenServer 5.0.7 : cscope local attacker can remove arbitrary files
Advisory number: 	SCOSA-2005.11
Issue date: 		2005 April 7
Cross reference:	sr892180 fz530504 erg712739 CAN-2004-0996
______________________________________________________________________________


1. Problem Description

	cscope is a developer's tool for browsing source code.

	cscope creates temporary files with an easily predictable
	file name. A local attacker could exploit this vulnerability
	and possibly gain elevated privileges on the system. 

	The Common Vulnerabilities and Exposures project (cve.mitre.org)
	has assigned the name CAN-2004-0996 to this issue.


2. Vulnerable Supported Versions

	System				Binaries
	----------------------------------------------------------------------
	OpenServer 5.0.6 		/usr/ccs/bin/cscope
	OpenServer 5.0.7		/usr/ccs/bin/cscope 

3. Solution

	The proper solution is to install the latest packages.

4. OpenServer 5.0.6

	4.1 Location of Fixed Binaries

	ftp://ftp.sco.com/pub/updates/OpenServer/SCOSA-2005.11

	4.2 Verification

	MD5 (VOL.000.000) = 1fb21699e2a86a2aeb390a57219ff567

	md5 is available for download from
		ftp://ftp.sco.com/pub/security/tools

	4.3 Installing Fixed Binaries

	Upgrade the affected binaries with the following sequence:

	1) Download the VOL* files to a directory

	2) Run the custom command, specify an install from media
	images, and specify the directory as the location of the
	images.


5. OpenServer 5.0.7

	5.1 Location of Fixed Binaries

	ftp://ftp.sco.com/pub/updates/OpenServer/SCOSA-2005.11

	5.2 Verification

	MD5 (VOL.000.000) = 1fb21699e2a86a2aeb390a57219ff567

	md5 is available for download from
		ftp://ftp.sco.com/pub/security/tools

	5.3 Installing Fixed Binaries

	Upgrade the affected binaries with the following sequence:

	1) Download the VOL* files to a directory

	2) Run the custom command, specify an install from media
	images, and specify the directory as the location of the
	images.


6. References

	Specific references for this advisory:
		http://xforce.iss.net/xforce/xfdb/18125 
		http://www.securityfocus.com/bid/11697 
		http://marc.theaimsgroup.com/?l=bugtraq&m=110133485519690&w=2 
		http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0996

	SCO security resources:
		http://www.sco.com/support/security/index.html

	SCO security advisories via email
		http://www.sco.com/support/forums/security.html

	This security fix closes SCO incidents sr892180 fz530504
	erg712739.


7. Disclaimer

	SCO is not responsible for the misuse of any of the information
	we provide on this website and/or through our security
	advisories. Our advisories are a service to our customers
	intended to promote secure installation and use of SCO
	products.


8. Acknowledgments

	SCO would like to thank Gangstuck / Psirac <research@rexotec.com>
	who disclosed this vulnerability. Jeremy Bae from STG
	Security Inc <swbae@stgsecurity.com> also disclosed this
	vulnerability to the vendor.

______________________________________________________________________________

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===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072

Internet Email: auscert@auscert.org.au
Facsimile:      (07) 3365 7031
Telephone:      (07) 3365 4417 (International: +61 7 3365 4417)
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                On call after hours for member emergencies only.
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