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UNIRAS Briefing - 550/2004 - Debian Security Advisory DSA 557-1 - New rp-pppoe packages fix potential root compromise.



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                                  UNIRAS (UK Gov CERT)
                                Advisory Type: Briefing

Id: 20041005-00751               Ref: 550/2004             Date: 05 October 2004   Time: 15:59
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Title: Debian Security Advisory DSA 557-1 - New rp-pppoe packages fix potential root compromise.

Abstract: Max Vozeler discovered a vulnerability in pppoe, the PPP over Ethernet driver from Roaring Penguin. 
When the program is running setuid root (which is not the case in a default Debian installation), 
an attacker could overwrite any file on the file system.
Comment: Max Vozeler discovered a vulnerability in pppoe, the PPP over Ethernet driver from Roaring Penguin. 
When the program is running setuid root (which is not the case in a default Debian installation), 
an attacker could overwrite any file on the file system.
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Title
=====

Debian Security Advisory DSA 557-1 - New rp-pppoe packages fix potential root compromise.

Detail
====== 

Max Vozeler discovered a vulnerability in pppoe, the PPP over Ethernet driver from Roaring Penguin. 
When the program is running setuid root (which is not the case in a default Debian installation), 
an attacker could overwrite any file on the file system.



            ESB-2004.0621 -- Debian Security Advisory DSA 557-1
            New rp-pppoe packages fix potential root compromise
                              5 October 2004


Product:                rp-pppoe, pppoe
Publisher:              Debian
Operating System:       Debian GNU/Linux 3.0
                        Linux variants
Impact:                 Overwrite Arbitrary Files
Access:                 Existing Account
CVE Names:              CAN-2004-0564

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Debian Security Advisory DSA 557-1                     security@xxxxxxxxxx
http://www.debian.org/security/                             Martin Schulze
October 4th, 2004                       http://www.debian.org/security/faq
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Package        : rp-pppoe, pppoe
Vulnerability  : missing privilegue dropping
Problem-Type   : local
Debian-specific: no
CVE ID         : CAN-2004-0564

Max Vozeler discovered a vulnerability in pppoe, the PPP over Ethernet driver from Roaring Penguin.  When the program is running setuid root (which is not the case in a default Debian installation), an attacker could overwrite any file on the file system.

For the stable distribution (woody) this problem has been fixed in version 3.3-1.2.

For the unstable distribution (sid) this problem has been fixed in version 3.5-4.

We recommend that you upgrade your pppoe package.


Upgrade Instructions
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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
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  Source archives:

    http://security.debian.org/pool/updates/main/r/rp-pppoe/rp-pppoe_3.3-1.2.dsc
      Size/MD5 checksum:      571 20a98e281e9effbdbe253d5f1ec7c07b
    http://security.debian.org/pool/updates/main/r/rp-pppoe/rp-pppoe_3.3-1.2.diff.gz
      Size/MD5 checksum:    17171 840c64159a02c63bcd84ad84acbcfbbe
    http://security.debian.org/pool/updates/main/r/rp-pppoe/rp-pppoe_3.3.orig.tar.gz
      Size/MD5 checksum:   171480 1cd6bc22f7601f769bb654db4a15b15d

  Alpha architecture:

    http://security.debian.org/pool/updates/main/r/rp-pppoe/pppoe_3.3-1.2_alpha.deb
      Size/MD5 checksum:    83104 ea1e596bbd07d28d272c723ef627b935

  ARM architecture:

    http://security.debian.org/pool/updates/main/r/rp-pppoe/pppoe_3.3-1.2_arm.deb
      Size/MD5 checksum:    60492 6f90f09bbb0115dd8b5aa08970fc7007

  Intel IA-32 architecture:

    http://security.debian.org/pool/updates/main/r/rp-pppoe/pppoe_3.3-1.2_i386.deb
      Size/MD5 checksum:    54276 765e571caff2562b74bdae9636712d58

  Intel IA-64 architecture:

    http://security.debian.org/pool/updates/main/r/rp-pppoe/pppoe_3.3-1.2_ia64.deb
      Size/MD5 checksum:    90212 c03d1045236ee6aaf0bec77e287b0a50

  HP Precision architecture:

    http://security.debian.org/pool/updates/main/r/rp-pppoe/pppoe_3.3-1.2_hppa.deb
      Size/MD5 checksum:    64064 8669b8c254a243fbb4620e9cf5ac5905

  Motorola 680x0 architecture:

    http://security.debian.org/pool/updates/main/r/rp-pppoe/pppoe_3.3-1.2_m68k.deb
      Size/MD5 checksum:    51000 23a16fdf89476bdf62107667d9f71d50

  Big endian MIPS architecture:

    http://security.debian.org/pool/updates/main/r/rp-pppoe/pppoe_3.3-1.2_mips.deb
      Size/MD5 checksum:    68078 750310a89f7f34d0e8921efb45999cda

  Little endian MIPS architecture:

    http://security.debian.org/pool/updates/main/r/rp-pppoe/pppoe_3.3-1.2_mipsel.deb
      Size/MD5 checksum:    68320 eb2c9ea82226df16363392e78ab04fb1

  PowerPC architecture:

    http://security.debian.org/pool/updates/main/r/rp-pppoe/pppoe_3.3-1.2_powerpc.deb
      Size/MD5 checksum:    56970 dd068ef0338515cc0a846ed1dfdf0dbc

  IBM S/390 architecture:

    http://security.debian.org/pool/updates/main/r/rp-pppoe/pppoe_3.3-1.2_s390.deb
      Size/MD5 checksum:    58376 8b520d4fc7ff356d40e7f7fc1b10b8e3

  Sun Sparc architecture:

    http://security.debian.org/pool/updates/main/r/rp-pppoe/pppoe_3.3-1.2_sparc.deb
      Size/MD5 checksum:    64326 c5523f8e12ec9bd01a003912df5611a7


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

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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@xxxxxxxxxxxxxxxx
Package info: `apt-cache show <pkg>' and http://packages.debian.org/<pkg>

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Acknowledgements

UNIRAS wishes to acknowledge the contributions of AusCERT for the information
contained in this Briefing.
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Updates

This Briefing contains the information released by the original author. Some 
of the information may have changed since it was released. If the vulnerability 
affects you, it may be prudent to retrieve the advisory from the canonical site 
to ensure that you receive the most current information concerning that problem.
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