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Message-ID: <200209271205.30845.aliz@gentoo.org>
From: aliz at gentoo.org (Daniel Ahlberg)
Subject: GLSA: dietlibc

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GENTOO LINUX SECURITY ANNOUNCEMENT
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PACKAGE        :dietlibc
SUMMARY        :integer overflow
DATE           :2002-09-27 10:00 UTC

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There is an integer overflow present in the xdr_array() function 
distributed as part of the Sun Microsystems XDR library. This overflow 
has been shown  to lead to remotely exploitable buffer overflows in 
multiple applications, leading to the execution of arbitrary code. 
Although the library was originally distributed by Sun Microsystems, 
multiple vendors have included the vulnerable code in their own 
implementations.

DETAIL

The XDR (external data representation) libraries are used to provide
platform-independent methods for sending data from one system process to
another, typically over a network connection. Such routines are commonly
used in remote procedure call (RPC) implementations to provide transparency 
to application programmers who need to use common interfaces to interact 
with many different types of systems. The xdr_array() function in the XDR 
library provided by Sun Microsystems contains an integer overflow that can 
lead to improperly sized dynamic memory allocation. Subsequent problems like 
buffer overflows may result, depending on how and where the vulnerable 
xdr_array() function is used.

More information can be found at:

http://cve.mitre.org/cgi-bin/cvename.cgi?name=3DCAN-2002-0391
http://www.kb.cert.org/vuls/id/192995

SOLUTION

It is recommended that all Gentoo Linux users who are running
dev-libs/dietlibc-0.16 and earlier update their systems
as follows:

emerge rsync
emerge dietlibc
emerge clean

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aliz@...too.org - GnuPG key is available at www.gentoo.org/~aliz
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