eSecurityOnline Security Advisory 3761 - Sun Solaris lbxproxy display name buffer overflow vulnerability

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

Copyright 2002 eSecurityOnline LLC. All rights reserved.

THE INFORMATION IN THIS VULNERABILITY ALERT IS PROVIDED BY
ESECURITYONLINE LLC "AS IS", "WHERE IS", WITH NO WARRANTY OF ANY KIND,
AND ESECURITYONLINE LLC HEREBY DISCLAIMS THE IMPLIED WARRANTIES OF
NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE. ESECURITYONLINE LLC SHALL HAVE NO LIABILITY FOR ANY DAMAGE,
CLAIM OR LOSS RESULTING FROM YOUR USE OF THE INFORMATION CONTAINED IN
THIS VULNERABILITY ALERT.