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Category:   Application (Generic)  >   dietlibc Vendors:   Debian
(Debian Issues Fix for 'dietlibc') Sun RPC Library Integer Overflow in xdrmem_getbytes() May Let Remote Users Execute Arbitrary Code
SecurityTracker Alert ID:  1006403
SecurityTracker URL:  http://securitytracker.com/id/1006403
CVE Reference:   CAN-2003-0028   (Links to External Site)
Date:  Mar 28 2003
Impact:   Denial of service via network, Execution of arbitrary code via network, Root access via network, User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  

Description:   An integer overflow vulnerability was reported in the Sun RPC External Data Representation (XDR) library and related implementations, including libnsl, libc, and glibc. A remote user may be able to cause arbitrary code to be executed by an application that uses one of the affected libraries.

It is reported that the xdrmem_getbytes() function contains an integer overflow that could result in dynamic memory allocation errors. Depending on how the application that uses the function is implemented, a buffer overflow could occur.

No further details were provided.

[Editor's note: The report appeared to be an advance copy of a CERT vulnerability note. However, the text not distributed by CERT. The text contained a CERT copyright notice, so we are unable to redistributed it at this time.]

Impact:   A remote user may be able to cause arbitrary code to be executed by an application that uses one of the affected libraries. The specific impact will depend on the application.
Solution:   Debian has released a fix in version 0.12-2.5 for the stable distribution (woody) and in version 0.22-2 for the unstable distribution (sid).

Debian GNU/Linux 3.0 alias woody:

Source archives:

http://security.debian.org/pool/updates/main/d/dietlibc/dietlibc_0.12-2.5.dsc
Size/MD5 checksum: 581 2b472a6986de2fe5e3561d7932ccb5bc
http://security.debian.org/pool/updates/main/d/dietlibc/dietlibc_0.12-2.5.diff.gz
Size/MD5 checksum: 9040 e49f1c3c007033258fcc8d171f3c42f6
http://security.debian.org/pool/updates/main/d/dietlibc/dietlibc_0.12.orig.tar.gz
Size/MD5 checksum: 415823 1b9019cc4e717470603d2716a602ec51

Architecture independent components:

http://security.debian.org/pool/updates/main/d/dietlibc/dietlibc-doc_0.12-2.5_all.deb
Size/MD5 checksum: 19032 2289d430c97d33c0a12a5eeff11fd945

Alpha architecture:

http://security.debian.org/pool/updates/main/d/dietlibc/dietlibc-dev_0.12-2.5_alpha.deb
Size/MD5 checksum: 264314 279ee6b13535b8500877abf35cd616f4

ARM architecture:

http://security.debian.org/pool/updates/main/d/dietlibc/dietlibc-dev_0.12-2.5_arm.deb
Size/MD5 checksum: 239226 59571adaf2d6981176f87d256d633e6e

Intel IA-32 architecture:

http://security.debian.org/pool/updates/main/d/dietlibc/dietlibc-dev_0.12-2.5_i386.deb
Size/MD5 checksum: 230736 d6766661ce15e7d0bb981dd4283af35c

Big endian MIPS architecture:

http://security.debian.org/pool/updates/main/d/dietlibc/dietlibc-dev_0.12-2.5_mips.deb
Size/MD5 checksum: 252976 3c99fd2d77addfb7a67fc60e9a6018d6

Little endian MIPS architecture:

http://security.debian.org/pool/updates/main/d/dietlibc/dietlibc-dev_0.12-2.5_mipsel.deb
Size/MD5 checksum: 251836 0e41a80c3ba91df8c6e3c79de5461953

PowerPC architecture:

http://security.debian.org/pool/updates/main/d/dietlibc/dietlibc-dev_0.12-2.5_powerpc.deb
Size/MD5 checksum: 246132 b519307b907470bea80fcfc7176473a5

Sun Sparc architecture:

http://security.debian.org/pool/updates/main/d/dietlibc/dietlibc-dev_0.12-2.5_sparc.deb
Size/MD5 checksum: 239174 cecf12ea63e4c51684c4dea394a5f8ed

Cause:   Boundary error
Underlying OS:   Linux (Debian)

Message History:   This archive entry is a follow-up to the message listed below.
Mar 16 2003 Sun RPC Library Integer Overflow in xdrmem_getbytes() May Let Remote Users Execute Arbitrary Code



 Source Message Contents

Date:  Fri, 28 Mar 2003 07:41:48 +0100 (CET)
Subject:  [SECURITY] [DSA 272-1] New dietlibc packages fix arbitrary code execution


-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

- --------------------------------------------------------------------------
Debian Security Advisory DSA 272-1                     security@debian.org
http://www.debian.org/security/                             Martin Schulze
March 28th, 2003                        http://www.debian.org/security/faq
- --------------------------------------------------------------------------

Package        : dietlibc
Vulnerability  : integer overflow
Problem-Type   : remote
Debian-specific: no
CVE Id         : CAN-2003-0028
CERT advisory  : VU#516825 CA-2003-10

eEye Digital Security discovered an integer overflow in the
xdrmem_getbytes() function of glibc, that is also present in dietlibc,
a small libc useful especially for small and embedded systems.  This
function is part of the XDR encoder/decoder derived from Sun's RPC
implementation.  Depending upon the application, this vulnerability
can cause buffer overflows and could possibly be exploited to execute
arbitray code.

For the stable distribution (woody) this problem has been
fixed in version 0.12-2.5.

The old stable distribution (potato) does not contain dietlibc
packages.

For the unstable distribution (sid) this problem has been
fixed in version 0.22-2.

We recommend that you upgrade your dietlibc packages.


Upgrade Instructions
- --------------------

wget url
        will fetch the file for you
dpkg -i file.deb
        will install the referenced file.

If you are using the apt-get package manager, use the line for
sources.list as given below:

apt-get update
        will update the internal database
apt-get upgrade
        will install corrected packages

You may use an automated update by adding the resources from the
footer to the proper configuration.


Debian GNU/Linux 3.0 alias woody
- --------------------------------

  Source archives:

    http://security.debian.org/pool/updates/main/d/dietlibc/dietlibc_0.12-2.5.dsc
      Size/MD5 checksum:      581 2b472a6986de2fe5e3561d7932ccb5bc
    http://security.debian.org/pool/updates/main/d/dietlibc/dietlibc_0.12-2.5.diff.gz
      Size/MD5 checksum:     9040 e49f1c3c007033258fcc8d171f3c42f6
    http://security.debian.org/pool/updates/main/d/dietlibc/dietlibc_0.12.orig.tar.gz
      Size/MD5 checksum:   415823 1b9019cc4e717470603d2716a602ec51

  Architecture independent components:

    http://security.debian.org/pool/updates/main/d/dietlibc/dietlibc-doc_0.12-2.5_all.deb
      Size/MD5 checksum:    19032 2289d430c97d33c0a12a5eeff11fd945

  Alpha architecture:

    http://security.debian.org/pool/updates/main/d/dietlibc/dietlibc-dev_0.12-2.5_alpha.deb
      Size/MD5 checksum:   264314 279ee6b13535b8500877abf35cd616f4

  ARM architecture:

    http://security.debian.org/pool/updates/main/d/dietlibc/dietlibc-dev_0.12-2.5_arm.deb
      Size/MD5 checksum:   239226 59571adaf2d6981176f87d256d633e6e

  Intel IA-32 architecture:

    http://security.debian.org/pool/updates/main/d/dietlibc/dietlibc-dev_0.12-2.5_i386.deb
      Size/MD5 checksum:   230736 d6766661ce15e7d0bb981dd4283af35c

  Big endian MIPS architecture:

    http://security.debian.org/pool/updates/main/d/dietlibc/dietlibc-dev_0.12-2.5_mips.deb
      Size/MD5 checksum:   252976 3c99fd2d77addfb7a67fc60e9a6018d6

  Little endian MIPS architecture:

    http://security.debian.org/pool/updates/main/d/dietlibc/dietlibc-dev_0.12-2.5_mipsel.deb
      Size/MD5 checksum:   251836 0e41a80c3ba91df8c6e3c79de5461953

  PowerPC architecture:

    http://security.debian.org/pool/updates/main/d/dietlibc/dietlibc-dev_0.12-2.5_powerpc.deb
      Size/MD5 checksum:   246132 b519307b907470bea80fcfc7176473a5

  Sun Sparc architecture:

    http://security.debian.org/pool/updates/main/d/dietlibc/dietlibc-dev_0.12-2.5_sparc.deb
      Size/MD5 checksum:   239174 cecf12ea63e4c51684c4dea394a5f8ed


  These files will probably be moved into the stable distribution on
  its next revision.

- ---------------------------------------------------------------------------------
For apt-get: deb http://security.debian.org/ stable/updates main
For dpkg-ftp: ftp://security.debian.org/debian-security dists/stable/updates/main
Mailing list: debian-security-announce@lists.debian.org
Package info: `apt-cache show <pkg>' and http://packages.debian.org/<pkg>

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