eSO Security Advisory: 3761 
Discovery Date: July 5, 2001 
ID: eSO:3761 
Title: Sun Solaris lbxproxy display name buffer 
                        overflow vulnerability 
Impact: Local attackers can gain group root privileges 
Affected Technology: Sun Solaris 8 x86 
Vendor Status: Vendor notified 
Discovered By: Kevin Kotas of the eSecurityOnline Research 
                        and Development Team 
CVE Reference: CAN-2002-0090 

Advisory Location: 
http://www.eSecurityOnline.com/advisories/eSO3761.asp 

Description: 
Sun Solaris lbxproxy is vulnerable to a buffer overflow condition that 
can allow an attacker to execute arbitrary code. The overflow occurs 
due to insufficient bounds checking on the display command line 
option. A display name can be given that, when processed, will alter 
program execution. 

Technical Recommendation: 
As a workaround solution, remove the setgid bit from the program. 

chmod -s /usr/openwin/bin/lbxproxy 

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