[UNIX] Sun Solaris admintool -d and PRODVERS Buffer Overflow Vulnerabilities

From: support@securiteam.com
Date: 04/30/02 

From: support@securiteam.com
To: list@securiteam.com
Date: Tue, 30 Apr 2002 22:47:05 +0200 (CEST)

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  Sun Solaris admintool -d and PRODVERS Buffer Overflow Vulnerabilities
------------------------------------------------------------------------

SUMMARY

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.

DETAILS

Vulnerable systems:
 * Solaris 2.5, 2.5.1, 2.6, 7, 8 SPARC and x86

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.

Sun:
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

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

ADDITIONAL INFORMATION

The information has been provided by
<mailto:researchteam5@esecurityonline.com> researchteam5.

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