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UNIRAS Brief - 545/04 - Two Debian Security Advisories



 
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   UNIRAS (UK Govt CERT) Briefing Notice - 545/04 dated 04.10.04  Time: 16:10  
  UNIRAS is part of NISCC (National Infrastructure Security Co-ordination Centre)
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  UNIRAS material is also available from its website at www.uniras.gov.uk and
         Information about NISCC is available from www.niscc.gov.uk
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Title
=====

Two Debian Security Advisories:

1. Debian Security Advisory DSA 555-1 - New frenet6 packages fix potential information leak
            
2. Debian Security Advisory DSA 556-1 - New netkit-telnet packages fix invalid free
                


Detail
====== 

1. Simon Josefsson noticed that the tspc.conf configuration file in freenet6, a client to 
configure an IPv6 tunnel to freenet6.net, is set world readable.  This file can contain 
the username and the password used to contact the IPv6 tunnelbroker freenet6.net.


2. Michal Zalewski discovered a bug in the netkit-telnet server (telnetd) whereby a remote 
attacker could cause the telnetd process to free an invalid pointer.  This causes the 
telnet server process to crash, leading to a straightforward denial of service (inetd 
will disable the service if telnetd is crashed repeatedly), or possibly the execution 
of arbitrary code with the privileges of the telnetd process (by default, the 'telnetd'
user).




            ESB-2004.0617 -- Debian Security Advisory DSA 555-1
            New frenet6 packages fix potential information leak
                              1 October 2004


Product:                freenet6
Publisher:              Debian
Operating System:       Debian GNU/Linux 3.0
Impact:                 Inappropriate Access
                        Access Privileged Data
Access:                 Existing Account
CVE Names:              CAN-2004-0563

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Hash: SHA1

- - - --------------------------------------------------------------------------
Debian Security Advisory DSA 555-1                     security@xxxxxxxxxx
http://www.debian.org/security/                             Martin Schulze
September 30th, 2004                    http://www.debian.org/security/faq
- - - --------------------------------------------------------------------------

Package        : freenet6
Vulnerability  : wrong file permissions
Problem-Type   : local
Debian-specific: yes
CVE ID         : CAN-2004-0563
Debian Bug     : 254709

Simon Josefsson noticed that the tspc.conf configuration file in freenet6, a client to
configure an IPv6 tunnel to freenet6.net, is set world readable.  This file can contain
the username and the password used to contact the IPv6 tunnelbroker freenet6.net.

For the stable distribution (woody) this problem has been fixed in version 0.9.6-1woody2.

For the unstable distribution (sid) this problem has been fixed in version 1.0-2.2.

We recommend that you upgrade your freenet6 package.


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/f/freenet6/freenet6_0.9.6-1woody2.dsc
      Size/MD5 checksum:      577 07d5a61effbf3748e61db855bf0afb4a
    http://security.debian.org/pool/updates/main/f/freenet6/freenet6_0.9.6-1woody2.diff.gz
      Size/MD5 checksum:    12385 9a30a4b9420bd4949e375358f974addc
    http://security.debian.org/pool/updates/main/f/freenet6/freenet6_0.9.6.orig.tar.gz
      Size/MD5 checksum:   334333 c846c0e734d93c7abdc1553781e1fa5b

  Alpha architecture:

    http://security.debian.org/pool/updates/main/f/freenet6/freenet6_0.9.6-1woody2_alpha.deb
      Size/MD5 checksum:    42380 3865b018d1808f349ade4d0d9e010af1

  ARM architecture:

    http://security.debian.org/pool/updates/main/f/freenet6/freenet6_0.9.6-1woody2_arm.deb
      Size/MD5 checksum:    39996 a9f3b9d6b98173bdbc0173b32b602698

  Intel IA-32 architecture:

    http://security.debian.org/pool/updates/main/f/freenet6/freenet6_0.9.6-1woody2_i386.deb
      Size/MD5 checksum:    38434 2217e61b208d1a7a0ba7aa358861946a

  Intel IA-64 architecture:

    http://security.debian.org/pool/updates/main/f/freenet6/freenet6_0.9.6-1woody2_ia64.deb
      Size/MD5 checksum:    54672 d8f7d48de839f7b117cb91da4880f1e3

  HP Precision architecture:

    http://security.debian.org/pool/updates/main/f/freenet6/freenet6_0.9.6-1woody2_hppa.deb
      Size/MD5 checksum:    39498 efb23a7b33d5c75dc12774b924f7adb7

  Motorola 680x0 architecture:

    http://security.debian.org/pool/updates/main/f/freenet6/freenet6_0.9.6-1woody2_m68k.deb
      Size/MD5 checksum:    37766 2c81680bcbd3a113e1e3f3cd08446e7c

  Big endian MIPS architecture:

    http://security.debian.org/pool/updates/main/f/freenet6/freenet6_0.9.6-1woody2_mips.deb
      Size/MD5 checksum:    40490 0181be8c2a012f601872e02284ad22e6

  Little endian MIPS architecture:

    http://security.debian.org/pool/updates/main/f/freenet6/freenet6_0.9.6-1woody2_mipsel.deb
      Size/MD5 checksum:    40538 a2f052292ddfadd2cf5f99d67e4b20fa

  PowerPC architecture:

    http://security.debian.org/pool/updates/main/f/freenet6/freenet6_0.9.6-1woody2_powerpc.deb
      Size/MD5 checksum:    38578 5e0aad661c57e19ed64376ee5d59a932

  IBM S/390 architecture:

    http://security.debian.org/pool/updates/main/f/freenet6/freenet6_0.9.6-1woody2_s390.deb
      Size/MD5 checksum:    39094 3e3f26c92e1ff8169bc5016a8215e11e

  Sun Sparc architecture:

    http://security.debian.org/pool/updates/main/f/freenet6/freenet6_0.9.6-1woody2_sparc.deb
      Size/MD5 checksum:    41458 1d3b8998d4dc533f4e6af82386e92515


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




2. 
            ESB-2004.0619 -- Debian Security Advisory DSA 556-1
                New netkit-telnet packages fix invalid free
                              4 October 2004


        
Product:                netkit-telnet
Publisher:              Debian
Operating System:       Debian GNU/Linux 3.0
Impact:                 Execute Arbitrary Code/Commands
                        Denial of Service
Access:                 Remote/Unauthenticated
CVE Names:              CAN-2004-0911

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Hash: SHA1

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Debian Security Advisory DSA 556-1                     security@xxxxxxxxxx
http://www.debian.org/security/                             Matt Zimmerman
October 2nd, 2004                       http://www.debian.org/security/faq
- - - --------------------------------------------------------------------------

Package        : netkit-telnet
Vulnerability  : invalid free(3)
Problem-Type   : remote
Debian-specific: yes
CVE ID         : CAN-2004-0911
Debian Bug     : 273694

Michal Zalewski discovered a bug in the netkit-telnet server (telnetd) whereby a remote 
attacker could cause the telnetd process to free an invalid pointer.  This causes the 
telnet server process to crash, leading to a straightforward denial of service (inetd 
will disable the service if telnetd is crashed repeatedly), or possibly the execution 
of arbitrary code with the privileges of the telnetd process (by default, the 'telnetd'
user).

For the stable distribution (woody) this problem has been fixed in version 0.17-18woody1.

For the unstable distribution (sid) this problem has been fixed in version 0.17-26.

We recommend that you upgrade your netkit-telnetpackage.


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/n/netkit-telnet/netkit-telnet_0.17-18woody1.dsc
      Size/MD5 checksum:      602 9b997bc6951c08c4f22c29dfe8fd6cfb
    http://security.debian.org/pool/updates/main/n/netkit-telnet/netkit-telnet_0.17-18woody1.diff.gz
      Size/MD5 checksum:    22010 29a22dc590270539e60e040fe33678a3
    http://security.debian.org/pool/updates/main/n/netkit-telnet/netkit-telnet_0.17.orig.tar.gz
      Size/MD5 checksum:   133749 d6beabaaf53fe6e382c42ce3faa05a36

  Alpha architecture:

    http://security.debian.org/pool/updates/main/n/netkit-telnet/telnet_0.17-18woody1_alpha.deb
      Size/MD5 checksum:    84080 64e59060bcc7713c33051b129eb7a7b2
    http://security.debian.org/pool/updates/main/n/netkit-telnet/telnetd_0.17-18woody1_alpha.deb
      Size/MD5 checksum:    45712 dc1f4eba203e25e0e69fde84d0c68deb

  ARM architecture:

    http://security.debian.org/pool/updates/main/n/netkit-telnet/telnet_0.17-18woody1_arm.deb
      Size/MD5 checksum:    69840 cee0940a812e1c14b3541bd408d8e772
    http://security.debian.org/pool/updates/main/n/netkit-telnet/telnetd_0.17-18woody1_arm.deb
      Size/MD5 checksum:    39534 78a51c224f171e029799183b8ba42357

  Intel IA-32 architecture:

    http://security.debian.org/pool/updates/main/n/netkit-telnet/telnet_0.17-18woody1_i386.deb
      Size/MD5 checksum:    70668 8f16858a8702fa7840c60fa272f336b5
    http://security.debian.org/pool/updates/main/n/netkit-telnet/telnetd_0.17-18woody1_i386.deb
      Size/MD5 checksum:    37344 48eadf90962f7641c9b109e6ed0b31e4

  Intel IA-64 architecture:

    http://security.debian.org/pool/updates/main/n/netkit-telnet/telnet_0.17-18woody1_ia64.deb
      Size/MD5 checksum:   102662 7ba021e10ae96097686b70c2b29c281d
    http://security.debian.org/pool/updates/main/n/netkit-telnet/telnetd_0.17-18woody1_ia64.deb
      Size/MD5 checksum:    52356 a87e16a648e472e06c0bcacdee2a3465

  HP Precision architecture:

    http://security.debian.org/pool/updates/main/n/netkit-telnet/telnet_0.17-18woody1_hppa.deb
      Size/MD5 checksum:    69878 436ca10d3adf53cf95d0fb1532fe8ca4
    http://security.debian.org/pool/updates/main/n/netkit-telnet/telnetd_0.17-18woody1_hppa.deb
      Size/MD5 checksum:    43430 f782d2555aba39ac4a3fc375601cbe41

  Motorola 680x0 architecture:

    http://security.debian.org/pool/updates/main/n/netkit-telnet/telnet_0.17-18woody1_m68k.deb
      Size/MD5 checksum:    67062 53604751760b712a28141bbfea772f02
    http://security.debian.org/pool/updates/main/n/netkit-telnet/telnetd_0.17-18woody1_m68k.deb
      Size/MD5 checksum:    37350 b8ba70a9e2b9c94edfbc2d5ad482f5f5

  Big endian MIPS architecture:

    http://security.debian.org/pool/updates/main/n/netkit-telnet/telnet_0.17-18woody1_mips.deb
      Size/MD5 checksum:    80782 34f5870ce7c7e90a7337e4ace622c145
    http://security.debian.org/pool/updates/main/n/netkit-telnet/telnetd_0.17-18woody1_mips.deb
      Size/MD5 checksum:    42520 005a24828fe4c192cbcaaa1b9e4a4b09

  Little endian MIPS architecture:

    http://security.debian.org/pool/updates/main/n/netkit-telnet/telnet_0.17-18woody1_mipsel.deb
      Size/MD5 checksum:    80670 b9cea5d2edda4f8c9453789c27aae058
    http://security.debian.org/pool/updates/main/n/netkit-telnet/telnetd_0.17-18woody1_mipsel.deb
      Size/MD5 checksum:    42490 cdb8fbe3737a45b2d215d36f8952c6ee

  PowerPC architecture:

    http://security.debian.org/pool/updates/main/n/netkit-telnet/telnet_0.17-18woody1_powerpc.deb
      Size/MD5 checksum:    73142 0f784e76f7d00238a9e9b13b880682db
    http://security.debian.org/pool/updates/main/n/netkit-telnet/telnetd_0.17-18woody1_powerpc.deb
      Size/MD5 checksum:    40184 5e9eddd27a6424698068bc990a98e6da

  IBM S/390 architecture:

    http://security.debian.org/pool/updates/main/n/netkit-telnet/telnet_0.17-18woody1_s390.deb
      Size/MD5 checksum:    73064 15178fb0215922e8084015c1745db52d
    http://security.debian.org/pool/updates/main/n/netkit-telnet/telnetd_0.17-18woody1_s390.deb
      Size/MD5 checksum:    41132 b8842ed3b2b92196b78872bfd7486dd6

  Sun Sparc architecture:

    http://security.debian.org/pool/updates/main/n/netkit-telnet/telnet_0.17-18woody1_sparc.deb
      Size/MD5 checksum:    74078 367023264c0accb466316b5ef9479b54
    http://security.debian.org/pool/updates/main/n/netkit-telnet/telnetd_0.17-18woody1_sparc.deb
      Size/MD5 checksum:    45226 477922c39e0ed5ca85ff8209a93f6386

  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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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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For additional information or assistance, please contact the HELP Desk by 
telephone or Not Protectively Marked information may be sent via 
EMail to: uniras@xxxxxxxxxxxx

Office Hours:
Mon - Fri: 08:30 - 17:00 Hrs
Tel: +44 (0) 870 487 0748 Ext 4511
Fax: +44 (0) 870 487 0749

Outside of Office Hours:
On Call Duty Officer:
Tel: +44 (0) 870 487 0748 and follow the prompts

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

Reference to any specific commercial product, process, or service by trade 
name, trademark manufacturer, or otherwise, does not constitute or imply 
its endorsement, recommendation, or favouring by UNIRAS or NISCC.  The views 
and opinions of authors expressed within this notice shall not be used for 
advertising or product endorsement purposes.

Neither UNIRAS or NISCC shall also accept responsibility for any errors 
or omissions contained within this briefing notice. In particular, they shall 
not be liable for any loss or damage whatsoever, arising from or in connection 
with the usage of information contained within this notice.

UNIRAS is a member of the Forum of Incident Response and Security Teams (FIRST) 
and has contacts with other international Incident Response Teams (IRTs) in 
order to foster cooperation and coordination in incident prevention, to prompt 
rapid reaction to incidents, and to promote information sharing amongst its 
members and the community at large. 
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<End of UNIRAS Briefing>

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