ISS Security Brief: Remote Buffer Overflow Vulnerability in Sun RPC

From: X-Force (
Date: 07/31/02

Date: Wed, 31 Jul 2002 12:22:04 -0400 (EDT)
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Internet Security Systems Security Brief
July 31, 2002

Remote Buffer Overflow Vulnerability in Sun RPC


Internet Security Systems (ISS) X-Force has discovered a buffer overflow
in the xdr_array filter primitive. This function is a part of the Sun RPC
library, and it is used in multiple RPC services. Any native or third party
software that uses the xdr_array function may be vulnerable. Vulnerable RPC
services are installed and enabled by default on the affected software


The buffer overflow vulnerability can allow remote attackers to execute
arbitrary commands on a target system with superuser privileges. Attackers
pose the most serious risk when attacking unprotected networks, or improperly
protected networks

Affected Versions:

Sun Microsystems Solaris 2.5.1
Sun Microsystems Solaris 2.6
Sun Microsystems Solaris 7
Sun Microsystems Solaris 8
Sun Microsystems Solaris 9

Note: The versions above were tested and found to be vulnerable. Additional
commercial and open-source Unix operating systems use implementations of Sun
RPC, and may also be vulnerable.

For the complete ISS X-Force Security Advisory, please visit:

About Internet Security Systems (ISS)
Founded in 1994, Internet Security Systems (ISS) (Nasdaq: ISSX) is a
pioneer and world leader in software and services that protect critical
online resources from an ever-changing spectrum of threats and misuse.
Internet Security Systems is headquartered in Atlanta, GA, with
additional operations throughout the Americas, Asia, Australia, Europe
and the Middle East.

Copyright (c) 2002 Internet Security Systems, Inc. All rights reserved

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