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Home » Hacking News » RedHat RHSA-2003:089-00: sun RPC XDR integer overflow

RedHat RHSA-2003:089-00: sun RPC XDR integer overflow

by Nikola Strahija on March 22nd, 2003 An integer overflow is present in the xdrmem_getbytes() function of glibc 2.3.1 and earlier. Depending upon the application, this vulnerability could cause buffer overflows and may be exploitable leading to arbitrary code execution.

Red Hat Security Advisory

Synopsis: Updated glibc packages fix vulnerabilities in RPC XDR decoder
Advisory ID: RHSA-2003:089-00
Issue date: 2003-03-19
Updated on: 2003-03-19
Product: Red Hat Linux
Keywords: sun RPC XDR integer overflow
Cross references:
Obsoletes: RHSA-2002:166
CVE Names: CAN-2003-0028

1. Topic:

Updated glibc packages are available to fix an integer overflow in the XDR

2. Relevant releases/architectures:

Red Hat Linux 6.2 - i386
Red Hat Linux 7.0 - i386, i686
Red Hat Linux 7.1 - i386, i686
Red Hat Linux 7.2 - i386, i686, ia64
Red Hat Linux 7.3 - i386, i686
Red Hat Linux 8.0 - i386, i686

3. Problem description:

The glibc package contains standard libraries that are used by
multiple programs on the system. Sun RPC is a remote procedure call
framework that allows clients to invoke procedures in a server process
over a network. XDR is a mechanism for encoding data structures for use
with RPC. Glibc contains an XDR encoder/decoder derived from Sun's RPC
implementation, which was demonstrated to be vulnerable to an integer

An integer overflow is present in the xdrmem_getbytes() function of glibc
2.3.1 and earlier. Depending upon the application, this vulnerability
could cause buffer overflows and may be exploitable leading to arbitrary
code execution.

All users should upgrade to these errata packages which contain patches to
the glibc libraries and therefore are not vulnerable to these issues.

Red Hat would like to thank eEye Digital Security for alerting us to this

The Red Hat Linux 8.0 errata packages also contain a number of bugfixes
that are not security related. For details, see the list of bugzilla bugs
fixed by this errata or the ChangeLog.

4. Solution:

Before applying this update, make sure all previously released errata
relevant to your system have been applied.

To update all RPMs for your particular architecture, run:

rpm -Fvh [filenames]

where [filenames] is a list of the RPMs you wish to upgrade. Only those
RPMs which are currently installed will be updated. Those RPMs which are
not installed but included in the list will not be updated. Note that you
can also use wildcards (*.rpm) if your current directory *only* contains the
desired RPMs.

Please note that this update is also available via Red Hat Network. Many
people find this an easier way to apply updates. To use Red Hat Network,
launch the Red Hat Update Agent with the following command:


This will start an interactive process that will result in the appropriate
RPMs being upgraded on your system.

5. Bug IDs fixed ( for more info):

76531 - /etc/group breaks when lines longer than 671 characters
77467 - upgrade to RH 8.0 glibc breaks mysql remote connections
81901 - character limit on any line in /etc/group - not to exceed 860
82565 - Commands that access group names fails when NIS group is large
82619 - maximum number of users in group
82645 - SEGV in __res_nquery (/lib/
82662 - regex library handle initialized values and crashes

6. RPMs required:

Red Hat Linux 6.2:



Red Hat Linux 7.0:




Red Hat Linux 7.1:




Red Hat Linux 7.2:





Red Hat Linux 7.3:




Red Hat Linux 8.0:




7. Verification:

MD5 sum Package Name
62e0ab4e2bdad458361ec80d8245d258 6.2/en/os/SRPMS/glibc-2.1.3-29.src.rpm
a348d457ad41811c1a3eac0df0a87fc7 6.2/en/os/i386/glibc-2.1.3-29.i386.rpm
a27dc4287275e31d1d880e97363a968d 6.2/en/os/i386/glibc-devel-2.1.3-29.i386.rpm
c552a2a1ea608b8a84ed1b566522d254 6.2/en/os/i386/glibc-profile-2.1.3-29.i386.rpm
8aecbace9b0d4ff6a967622e11bc496f 6.2/en/os/i386/nscd-2.1.3-29.i386.rpm
9d85a9a6151dce2d1dbe0e927f04245f 7.0/en/os/SRPMS/glibc-2.2.4-
c42fac72eaf7701ca065a4ccb6f0153a 7.0/en/os/i386/glibc-2.2.4-
26e54d659fb58b28738b9405035d568f 7.0/en/os/i386/glibc-common-2.2.4-
3b4b852082782a52ffdee7f429015bf5 7.0/en/os/i386/glibc-devel-2.2.4-
131c0cdf232d5c1813c8a148e9560be0 7.0/en/os/i386/glibc-profile-2.2.4-
f6ae3bd79665488945f50d0edcf65177 7.0/en/os/i386/nscd-2.2.4-
580ac0d305eb59884725d030d97cccc2 7.0/en/os/i686/glibc-2.2.4-
ecdba77a6d14da22cb177e0abf414a63 7.1/en/os/SRPMS/glibc-2.2.4-32.src.rpm
8acd0559a855451e799844642aba68a1 7.1/en/os/i386/glibc-2.2.4-32.i386.rpm
5f8e424f8f8bea96b8148569fe76f676 7.1/en/os/i386/glibc-common-2.2.4-32.i386.rpm
69adfa611538eccb1f9af0060ebc1005 7.1/en/os/i386/glibc-devel-2.2.4-32.i386.rpm
8979153117cbbe8e9dc339832d90371b 7.1/en/os/i386/glibc-profile-2.2.4-32.i386.rpm
8f47e69a49d039028e5e5871a61404d5 7.1/en/os/i386/nscd-2.2.4-32.i386.rpm
f95a9614f0903e665d4868db72343672 7.1/en/os/i686/glibc-2.2.4-32.i686.rpm
ecdba77a6d14da22cb177e0abf414a63 7.2/en/os/SRPMS/glibc-2.2.4-32.src.rpm
8acd0559a855451e799844642aba68a1 7.2/en/os/i386/glibc-2.2.4-32.i386.rpm
5f8e424f8f8bea96b8148569fe76f676 7.2/en/os/i386/glibc-common-2.2.4-32.i386.rpm
69adfa611538eccb1f9af0060ebc1005 7.2/en/os/i386/glibc-devel-2.2.4-32.i386.rpm
8979153117cbbe8e9dc339832d90371b 7.2/en/os/i386/glibc-profile-2.2.4-32.i386.rpm
8f47e69a49d039028e5e5871a61404d5 7.2/en/os/i386/nscd-2.2.4-32.i386.rpm
f95a9614f0903e665d4868db72343672 7.2/en/os/i686/glibc-2.2.4-32.i686.rpm
007dc5f3cb374d14336f3f266d3bea2b 7.2/en/os/ia64/glibc-2.2.4-32.ia64.rpm
15d563b7bd87efed597e6743f90ce9b8 7.2/en/os/ia64/glibc-common-2.2.4-32.ia64.rpm
f3d7ece002e59df71d66e2466253841b 7.2/en/os/ia64/glibc-devel-2.2.4-32.ia64.rpm
979b15fd0df46f1466d18531da482ae9 7.2/en/os/ia64/glibc-profile-2.2.4-32.ia64.rpm
3cf31f2cbfdeda6a9b3798b06b53ca77 7.2/en/os/ia64/nscd-2.2.4-32.ia64.rpm
f42271d9ace5d8251c6ff7cce6731c0b 7.3/en/os/SRPMS/glibc-2.2.5-43.src.rpm
97277f54447fae6c37d8bb1e49f99481 7.3/en/os/i386/glibc-2.2.5-43.i386.rpm
e2e952edc1bf2807d0f158d4983d73dc 7.3/en/os/i386/glibc-common-2.2.5-43.i386.rpm
f907c32e672a1408aa6cc89ae16e0f2f 7.3/en/os/i386/glibc-debug-2.2.5-43.i386.rpm
806d2c9e33a65e05df0719b67c1c061f 7.3/en/os/i386/glibc-debug-static-2.2.5-43.i386.rpm
0400f0b2775a7c964ef29f226cfe438b 7.3/en/os/i386/glibc-devel-2.2.5-43.i386.rpm
746b89ddddd31a998257b0daf24960f0 7.3/en/os/i386/glibc-profile-2.2.5-43.i386.rpm
5f7f2463520d9437c6288a9003198683 7.3/en/os/i386/glibc-utils-2.2.5-43.i386.rpm
5aa6664f6fb5af7d4bdb93570ff57eff 7.3/en/os/i386/nscd-2.2.5-43.i386.rpm
d42a1e3194a7e1e81fb25224c2a90c26 7.3/en/os/i686/glibc-2.2.5-43.i686.rpm
a16799782d9d5c482813af751d3060d8 7.3/en/os/i686/glibc-debug-2.2.5-43.i686.rpm
005f2233e8c3ec021aa213403aba0b33 8.0/en/os/SRPMS/glibc-2.3.2-4.80.src.rpm
4ed3fad01d2ac1659dc4de82d3ca9edd 8.0/en/os/i386/glibc-2.3.2-4.80.i386.rpm
94c9971ef7bf51245ca09e98219af92d 8.0/en/os/i386/glibc-common-2.3.2-4.80.i386.rpm
7df5a7116dd106597c7ea7931b7a460a 8.0/en/os/i386/glibc-debug-2.3.2-4.80.i386.rpm
7c8f863f43aa26a74e6a726f81f90711 8.0/en/os/i386/glibc-debug-static-2.3.2-4.80.i386.rpm
e60bc3fdee3d4d475f04207ed27a8485 8.0/en/os/i386/glibc-devel-2.3.2-4.80.i386.rpm
533ff8650b033979b853fae7e9ebc291 8.0/en/os/i386/glibc-profile-2.3.2-4.80.i386.rpm
37c9041bb23e92247c2702d768b04fde 8.0/en/os/i386/glibc-utils-2.3.2-4.80.i386.rpm
7a1afdd22dea604552aefc4b552ca721 8.0/en/os/i386/nscd-2.3.2-4.80.i386.rpm
820e9b6185c1dae6d41ec417ab5889f0 8.0/en/os/i686/glibc-2.3.2-4.80.i686.rpm
c74fdf5b7defb143e114813419d10db6 8.0/en/os/i686/glibc-debug-2.3.2-4.80.i686.rpm

These packages are GPG signed by Red Hat, Inc. for security. Our key
is available at

You can verify each package with the following command:

rpm --checksig -v

If you only wish to verify that each package has not been corrupted or
tampered with, examine only the md5sum with the following command:


8. References:

9. Contact:

The Red Hat security contact is . More contact
details at

Copyright 2003 Red Hat, Inc.

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