eSecurityOnline Security Advisory 2397 - Sun Solaris admintool -d and PRODVERS buffer overflow vulnerabilities

[researchteam5 () esecurityonline com]

eSO Security Advisory:  2397  
Discovery Date:         March 28, 2000 
ID:                     eSO:2397
Title:                  Sun Solaris admintool -d and PRODVERS buffer
                        overflow vulnerabilities 
Impact:                 Local attackers can gain root privileges
Affected Technology:    Solaris 2.5, 2.5.1, 2.6, 7, 8 SPARC and x86 
Vendor Status:          Patches are available
Discovered By:          Kevin Kotas of the eSecurityOnline Research
                        and Development Team 
CVE Reference:          CAN-2002-0089 

Advisory Location:
http://www.eSecurityOnline.com/advisories/eSO2397.asp 

Description:
The Sun Solaris admintool utility is vulnerable to multiple buffer
overflow conditions that allow a local attacker to gain root access.
The problems are due to insufficient bounds checking on command line
options and on a configuration file variable. An attacker can use a 
carefully constructed string with the -d command line option or with
the PRODVERS .cdtoc file variable to gain root privileges.

The first buffer overflow is related to command line execution of
admintool with the -d switch, when a long string is used with 
"/Solaris" present.

The second buffer overflow occurs due to a lack of bounds checking 
for the PRODVERS argument in the .cdtoc file. The .cdtoc file is used
to specify variables for installation media. Through the
software/edit/add feature, a local directory can be specified that
contains a .cdtoc file. The file can contain a string of data for
the PRODVERS variable that will cause the program to crash or execute
code when processed.  

Technical Recommendation:
Apply the following patches.

Solaris 2.5: 
103247-16

Solaris 2.5_x86:
103245-16

Solaris 2.5.1:
103558-16

Solaris 2.5.1_x86: 
103559-16

Solaris 2.6: 
105800-07

Solaris 2.6_x86: 
105801-07

Solaris 7: 
108721-02

Solaris 7_x86: 
108722-02

Solaris 8: 
10453-01

Solaris 8_x86:
110454-01

As a workaround solution, remove the setuid permissions with the following:
chmod -s /usr/bin/admintool  

Vendor site:
http://sunsolve.sun.com  

Acknowledgements:
eSecurityOnline would like to thank Sun Microsystems and the Sun security
team for their cooperation in resolving the issue.  

Copyright 2002 eSecurityOnline LLC.  All rights reserved.  

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