TUCoPS :: SGI :: ciacg026.txt

SGI Permissions Panel

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	     __________________________________________________________

		       The U.S.	Department of Energy
		    Computer Incident Advisory Capability
			   ___	__ __	 _     ___
			  /	  |	/_\   /
			  \___	__|__  /   \  \___
	     __________________________________________________________

			     INFORMATION BULLETIN

		  IRIX Desktop Permissions Panel Vulnerability

May 23,	1996 18:00 GMT						   Number G-26
______________________________________________________________________________
PROBLEM:       A vulnerability has been	discovered in the Desktop Permissions
	       tool on the IRIX	5.3, 6.1, and 6.2 operating systems under the
	       IRIX desktop environment.
PLATFORM:      SGI platforms running IRIX 5.3, 6.1 or 6.2 operating systems
DAMAGE:	       A user that can start up	the IRIX desktop graphical permissions
	       tool could modify permissions on	files they don't own (ex:
	       root-owned files)
SOLUTION:      See the attached	SGI bulletin below for more information	on
	       patch availability.
______________________________________________________________________________


[ SGI Bulletin Begin]
______________________________________________________________________________
		Silicon	Graphics Inc. Security Advisory

	Title:	 IRIX 5.3, 6.1,	6.2 Desktop Permissions	Panel
	Number:	 19960501-01-PX
	Date:	 May 21, 1996
______________________________________________________________________________
Silicon	Graphics provides this information freely to the SGI user community
for its	consideration, interpretation, implementation and use.	 Silicon
Graphics recommends that this information be acted upon	as soon	as possible.

Silicon	Graphics  will	not  be	 liable	 for any  indirect, special, or
consequential damages arising from the use of, failure to use or improper
use of any of the instructions or information in this Security Advisory.
______________________________________________________________________________


- - --------------
- - --- Impact ---
- - --------------


A vulnerability	has been discovered in the IRIX	5.3, 6.1, and 6.2
operating systems regarding the	permissions tool under the IRIX
desktop	environment.

Normally, this tool is used by users to	modify the permissions on their
files and files	they are privileged for.  Under	certain	conditions, a user
may be able to modify the permissions for restricted files.  This is SGI
Bug #375613.

In order to exploit this vulnerability,	it is necessary	to have	access
to a local account that	can start the graphical	permissions tool.
Refer to SGI Security Advisory 19951002	and/or system documentation
regarding password issues.

SGI Engineering	has investigated this issue and	recommends the following
steps for neutralizing the exposure.  It is HIGHLY RECOMMENDED that these
measures be done on ALL	SGI systems running IRIX 5.3, 6.1, and 6.2.
This issue will	be corrected in	future releases	of IRIX.



- - ----------------
- - --- Solution ---
- - ----------------



**** IRIX 5.2, 6.0, 6.0.1 ****

IRIX operating system versions 5.2, 6.0, and 6.0.1 are not vulnerable.
No further action is required.


**** IRIX 5.3 ****

For the	IRIX operating system version 5.3, an inst-able	patch has been
generated and made available via anonymous FTP and your	service/support
provider.  The patch is	number 1324 and	will only install on IRIX 5.3.

The SGI	anonymous FTP site is sgigate.sgi.com (204.94.209.1) or	its
mirror,	ftp.sgi.com.   Patch 1324 can be found in the following
directories on the FTP server:

	~ftp/Security

		or

	~ftp/Patches/5.3

			##### Checksums	####

The actual patch will be a tar file containing the following files:


Filename:		  README.patch.1324
Algorithm #1 (sum -r):	  36453	8 README.patch.1324
Algorithm #2 (sum):	  40114	8 README.patch.1324
MD5 checksum:		  028F5506433A1B9F770F1809D741EF98

Filename:		  patchSG0001324
Algorithm #1 (sum -r):	  10430	1 patchSG0001324
Algorithm #2 (sum):	  35624	1 patchSG0001324
MD5 checksum:		  F7C85F5A0870BA4C08DD62F181C81F2E

Filename:		  patchSG0001324.desktop_eoe_sw
Algorithm #1 (sum -r):	  40704	106 patchSG0001324.desktop_eoe_sw
Algorithm #2 (sum):	  32497	106 patchSG0001324.desktop_eoe_sw
MD5 checksum:		  EAF31E523E150A29FCF487B1C2802F50

Filename:		  patchSG0001324.idb
Algorithm #1 (sum -r):	  62749	2 patchSG0001324.idb
Algorithm #2 (sum):	  58166	2 patchSG0001324.idb
MD5 checksum:		  96E559406CA6ABD75ACAA879776D028E



**** IRIX 6.1 ****

For the	IRIX operating system version 6.1, an inst-able	patch has been
generated and made available via anonymous FTP and your	service/support
provider.  The patch is	number 1325 and	will only install on IRIX 6.1.

The SGI	anonymous FTP site is sgigate.sgi.com (204.94.209.1) or	its
mirror,	ftp.sgi.com.   Patch 1325 can be found in the following
directories on the FTP server:

	~ftp/Security

		or

	~ftp/Patches/6.1

			##### Checksums	####

The actual patch will be a tar file containing the following files:


Filename:		  README.patch.1325
Algorithm #1 (sum -r):	  64561	8 README.patch.1325
Algorithm #2 (sum):	  40513	8 README.patch.1325
MD5 checksum:		  846AECCEA5658BAFC843999968EC1F19

Filename:		  patchSG0001325
Algorithm #1 (sum -r):	  49679	1 patchSG0001325
Algorithm #2 (sum):	  31737	1 patchSG0001325
MD5 checksum:		  277DC0914388DB42CAF4F67166B6AD84

Filename:		  patchSG0001325.desktop_eoe_sw
Algorithm #1 (sum -r):	  23688	106 patchSG0001325.desktop_eoe_sw
Algorithm #2 (sum):	  16622	106 patchSG0001325.desktop_eoe_sw
MD5 checksum:		  F9C6CBB8085916980F6FB0E750ED2739

Filename:		  patchSG0001325.idb
Algorithm #1 (sum -r):	  44246	2 patchSG0001325.idb
Algorithm #2 (sum):	  58029	2 patchSG0001325.idb
MD5 checksum:		  7B5A50A754D4F2BCF43B2FB36402D2B9



**** IRIX 6.2 ****

For the	IRIX operating system version 6.2, an inst-able	patch has been
generated and made available via anonymous FTP and your	service/support
provider.  The patch is	number 1326 and	will only install on IRIX 6.2.

The SGI	anonymous FTP site is sgigate.sgi.com (204.94.209.1) or	its
mirror,	ftp.sgi.com.   Patch 1326 can be found in the following
directories on the FTP server:

	~ftp/Security

		or

	~ftp/Patches/6.2

			##### Checksums	####

The actual patch will be a tar file containing the following files:


Filename:		  README.patch.1326
Algorithm #1 (sum -r):	  26556	8 README.patch.1326
Algorithm #2 (sum):	  40503	8 README.patch.1326
MD5 checksum:		  100284465A0FC83BCDA9F51276628C2F

Filename:		  patchSG0001326
Algorithm #1 (sum -r):	  09453	1 patchSG0001326
Algorithm #2 (sum):	  33991	1 patchSG0001326
MD5 checksum:		  F22B45302095D815129FCDB52204F947

Filename:		  patchSG0001326.desktop_eoe_sw
Algorithm #1 (sum -r):	  33276	105 patchSG0001326.desktop_eoe_sw
Algorithm #2 (sum):	  65086	105 patchSG0001326.desktop_eoe_sw
MD5 checksum:		  10798EFCDAB679BC26DE18A007666599

Filename:		  patchSG0001326.idb
Algorithm #1 (sum -r):	  34209	2 patchSG0001326.idb
Algorithm #2 (sum):	  57308	2 patchSG0001326.idb
MD5 checksum:		  3F7CA27CB954C83ACA7E711B1F29139F



- - ------------------------
- - --- Acknowledgments ---
- - ------------------------

Silicon	Graphics wishes	to thank Aaron Mantel of NASA for his
assistance in this matter.



- - -----------------------------------------
- - --- SGI Security Information/Contacts	---
- - -----------------------------------------

Past SGI Advisories and	security patches can be	obtained via
anonymous FTP from sgigate.sgi.com or its mirror, ftp.sgi.com.
These security patches and advisories are provided freely to
all interested parties.	  For issues with the patches on the
FTP sites, email can be	sent to	cse-security-alert@csd.sgi.com.

For assistance obtaining or working with security patches, please
contact	your SGI support provider.

If there are questions about this document, email can be sent to
cse-security-alert@csd.sgi.com.

Silicon	Graphics provides a free security mailing list service.	The
wiretap	service	allows interested parties to self-subscribe to receive
(via email) all	SGI Security Advisories	when released.

     mail external-majordomo@postofc.corp.sgi.com

     [BODY of "subscribe wiretap YourEmailAddress"]

For reporting *NEW* SGI	security issues, email can be sent to
security-alert@sgi.com or contact your SGI support provider.  A
support	contract is not	required for submitting	a security report.

For those customers with WWW capability, the Silicon Graphics Security
Headquarters webpages serve as a focal point for security related
information for	the Silicon Graphics environment.  The URL is:

     http://www.sgi.com/Support/Secur/security.html

[ End SGI Bulletin ]
_______________________________________________________________________________

CIAC wishes to acknowledge the contributions of	Silicon	Graphics for the
information contained in this bulletin.
_______________________________________________________________________________

CIAC, the Computer Incident Advisory Capability, is the	computer
security incident response team	for the	U.S. Department	of Energy
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This document was prepared as an account of work sponsored by an
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LAST 10	CIAC BULLETINS ISSUED (Previous	bulletins available from CIAC)

G-16: SGI rpc.statd Program Security Vulnerabilities
G-17: Vulnerabilities in Sample	HTTPD CGIs
G-18: Digital OSF/1 dxconsole Security Vulnerability
G-19: IBM AIX rmail Vulnerability
G-20: Vulnerability in NCSA and	Apache httpd Servers
G-21: Vulnerabilities in PCNFSD	Program
G-22: rpc.statd	Vulnerability
G-23: Solaris NIS+ Configuration Vulnerability
G-24: FreeBSD Security Vulnerabilities
G-25: SUN statd	Program	Vulnerability

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Notes 08 - 4/4/95      A Courtney update

Notes 09 - 4/24/95     More on the "Good Times"	virus urban legend

Notes 10 - 6/16/95     PKZ300B Trojan, Logdaemon/FreeBSD, vulnerability
		       in S/Key, EBOLA Virus Hoax, and Caibua Virus

Notes 11 - 7/31/95     Virus Update, Hats Off to Administrators,
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Notes 12 - 9/12/95     Securely	configuring Public Telnet Services, X
		       Windows,	beta release of	Merlin,	Microsoft Word
		       Macro Viruses, Allegations of Inappropriate Data
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Notes 96-01 - 3/18/96  Java and	JavaScript Vulnerabilities, FIRST
		       Conference Announcement,	Security and Web Search
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