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Category:   Application (Generic)  >   uux Vendors:   Caldera/SCO
Caldera OpenServer UNIX-to-UNIX System Command Execution Utility 'uux' Has Buffer Overflow That Lets Local Users Grab Root
SecurityTracker Alert ID:  1004783
SecurityTracker URL:  http://securitytracker.com/id/1004783
CVE Reference:   GENERIC-MAP-NOMATCH   (Links to External Site)
Date:  Jul 16 2002
Impact:   Execution of arbitrary code via local system, Root access via local system
Fix Available:  Yes  Vendor Confirmed:  Yes  

Description:   A buffer overflow vulnerability was reported in the UNIX-to-UNIX system command execution utility (uux) on Caldera's OpenServer. A local user may be able to execute arbitrary code with root privileges.

Caldera reported that a local user can provide a long status file name to the uux program to trigger a memory fault and cause arbitrary code to be executed with root privileges. No further details were provided.

Caldera credits KF <dotslash at snosoft.com> with discovering this bug.

Impact:   A local user can execute arbitrary code with root privileges to obtain root access on the system.
Solution:   Caldera has issued a fix for OpenServer.

For OpenServer 5.0.5:

Location of Fixed Binaries

ftp://ftp.caldera.com/pub/updates/OpenServer/CSSA-2002-SCO.34


Verification

MD5 (VOL.000.000) = 77bd1623ed1d220f976736124b743fc7

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


Installing Fixed Binaries

Upgrade the affected binaries with the following commands:

1) Download the VOL* files to the /tmp directory

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


For OpenServer 5.0.6:

Location of Fixed Binaries

ftp://ftp.caldera.com/pub/updates/OpenServer/CSSA-2002-SCO.34


Verification

MD5 (VOL.000.000) = 77bd1623ed1d220f976736124b743fc7

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


Installing Fixed Binaries

Upgrade the affected binaries with the following commands:

1) Download the VOL* files to the /tmp directory

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

Vendor URL:  www.caldera.com/support/security/index.html (Links to External Site)
Cause:   Boundary error
Underlying OS:  UNIX (Open UNIX-SCO)
Underlying OS Comments:  OpenServer 5.0.5, 5.0.6

Message History:   None.


 Source Message Contents

Subject:  Security Update: [CSSA-2002-SCO.34] OpenServer 5.0.5 OpenServer 5.0.6 : uux status file name buffer overflow


--uZ3hkaAS1mZxFaxD
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To: bugtraq@securityfocus.com announce@lists.caldera.com scoannmod@xenitec.on.ca

______________________________________________________________________________

		Caldera International, Inc.  Security Advisory

Subject:		OpenServer 5.0.5 OpenServer 5.0.6 : uux status file name buffer overflow
Advisory number: 	CSSA-2002-SCO.34
Issue date: 		2002 July 15
Cross reference:
______________________________________________________________________________


1. Problem Description

	A very long status file name given to the uux program would
	cause it to memory fault. This could be used by a malicious
	local user to gain privilege.


2. Vulnerable Supported Versions

	System				Binaries
	----------------------------------------------------------------------
	OpenServer 5.0.5		/usr/bin/uux
	OpenServer 5.0.6		/usr/bin/uux


3. Solution

	The proper solution is to install the latest packages.


4. OpenServer 5.0.5

	4.1 Location of Fixed Binaries

	ftp://ftp.caldera.com/pub/updates/OpenServer/CSSA-2002-SCO.34


	4.2 Verification

	MD5 (VOL.000.000) = 77bd1623ed1d220f976736124b743fc7

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


	4.3 Installing Fixed Binaries

		Upgrade the affected binaries with the following commands:

	1) Download the VOL* files to the /tmp directory

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


5. OpenServer 5.0.6

	5.1 Location of Fixed Binaries

	ftp://ftp.caldera.com/pub/updates/OpenServer/CSSA-2002-SCO.34


	5.2 Verification

	MD5 (VOL.000.000) = 77bd1623ed1d220f976736124b743fc7

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


	5.3 Installing Fixed Binaries

		Upgrade the affected binaries with the following commands:

	1) Download the VOL* files to the /tmp directory

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


6. References

	Specific references for this advisory:
		none

	Caldera security resources:
		http://www.caldera.com/support/security/index.html

	This security fix closes Caldera incidents sr865287, fz521102,
	erg712066.


7. Disclaimer

	Caldera International, Inc. 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 Caldera products.


8. Acknowledgements

	KF <dotslash@snosoft.com> discovered and researched this
	vulnerability.

______________________________________________________________________________

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