DSA 569-1: New netkit-telnet-ssl packages fix denial of service

Posted by Philipp Esselbach on: 10/18/2004 05:18 AM [ Print | 0 comment(s) ]

New netkit-telnet-ssl packages are available for Debian GNU/Linux

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Debian Security Advisory DSA 569-1 security@debian.org
http://www.debian.org/security/ Martin Schulze
October 18th, 2004 http://www.debian.org/security/faq
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Package : netkit-telnet-ssl
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 0.17.17+0.1-2woody2

For the unstable distribution (sid) this problem has been fixed in version 0.17.24+0.1-4.

We recommend that you upgrade your netkit-telnet-ssl 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/n/netkit-telnet-ssl/netkit-telnet-ssl_0.17.17+0.1-2woody2.dsc
Size/MD5 checksum: 669 c0333bf798925d74a2b0cd156eb691cc
http://security.debian.org/pool/updates/main/n/netkit-telnet-ssl/netkit-telnet-ssl_0.17.17+0.1-2woody2.diff.gz
Size/MD5 checksum: 8632 d0b418abcc29fc1790ab5aafb6836dd1
http://security.debian.org/pool/updates/main/n/netkit-telnet-ssl/netkit-telnet-ssl_0.17.17+0.1.orig.tar.gz
Size/MD5 checksum: 167658 faf2d112bc4d44f522bad3bc73da8d6d

Alpha architecture:

http://security.debian.org/pool/updates/main/n/netkit-telnet-ssl/telnet-ssl_0.17.17+0.1-2woody2_alpha.deb
Size/MD5 checksum: 101014 abb3671e001662e6e5166d716ad8bfb6
http://security.debian.org/pool/updates/main/n/netkit-telnet-ssl/telnetd-ssl_0.17.17+0.1-2woody2_alpha.deb
Size/MD5 checksum: 56848 bb8b0d77208c7f44c63e95a4f7083e21

ARM architecture:

http://security.debian.org/pool/updates/main/n/netkit-telnet-ssl/telnet-ssl_0.17.17+0.1-2woody2_arm.deb
Size/MD5 checksum: 85130 a87761b01081e99e8acc94f40f3aa50b
http://security.debian.org/pool/updates/main/n/netkit-telnet-ssl/telnetd-ssl_0.17.17+0.1-2woody2_arm.deb
Size/MD5 checksum: 48482 cabc1071adeac0c6472dfb10731d6995

Intel IA-32 architecture:

http://security.debian.org/pool/updates/main/n/netkit-telnet-ssl/telnet-ssl_0.17.17+0.1-2woody2_i386.deb
Size/MD5 checksum: 85456 5f9f99786a8a26c0dcdfacbd2da11383
http://security.debian.org/pool/updates/main/n/netkit-telnet-ssl/telnetd-ssl_0.17.17+0.1-2woody2_i386.deb
Size/MD5 checksum: 46586 fee9f04d1a9768f278537e5571300257

Intel IA-64 architecture:

http://security.debian.org/pool/updates/main/n/netkit-telnet-ssl/telnet-ssl_0.17.17+0.1-2woody2_ia64.deb
Size/MD5 checksum: 123126 5ed1d2854d7e91f90724bebcf590252f
http://security.debian.org/pool/updates/main/n/netkit-telnet-ssl/telnetd-ssl_0.17.17+0.1-2woody2_ia64.deb
Size/MD5 checksum: 66550 dd096a3593565c983d94730eae09eee9

HP Precision architecture:

http://security.debian.org/pool/updates/main/n/netkit-telnet-ssl/telnet-ssl_0.17.17+0.1-2woody2_hppa.deb
Size/MD5 checksum: 86484 f8105593d974b60cd6fcb5f23c41a890
http://security.debian.org/pool/updates/main/n/netkit-telnet-ssl/telnetd-ssl_0.17.17+0.1-2woody2_hppa.deb
Size/MD5 checksum: 53812 a2a6d0755b21d53714b34d1a3a38450c

Motorola 680x0 architecture:

http://security.debian.org/pool/updates/main/n/netkit-telnet-ssl/telnet-ssl_0.17.17+0.1-2woody2_m68k.deb
Size/MD5 checksum: 81360 2a99b7a46d1e7f4abad46afef6549351
http://security.debian.org/pool/updates/main/n/netkit-telnet-ssl/telnetd-ssl_0.17.17+0.1-2woody2_m68k.deb
Size/MD5 checksum: 45370 31cb862bbaefbcc9520834fd7393abfb

Big endian MIPS architecture:

http://security.debian.org/pool/updates/main/n/netkit-telnet-ssl/telnet-ssl_0.17.17+0.1-2woody2_mips.deb
Size/MD5 checksum: 97340 31a847f384aa1410f31785185d52bd75
http://security.debian.org/pool/updates/main/n/netkit-telnet-ssl/telnetd-ssl_0.17.17+0.1-2woody2_mips.deb
Size/MD5 checksum: 52136 311f7252452a4b39168a9ead120f71b2

Little endian MIPS architecture:

http://security.debian.org/pool/updates/main/n/netkit-telnet-ssl/telnet-ssl_0.17.17+0.1-2woody2_mipsel.deb
Size/MD5 checksum: 97156 de9a70f8a3893c6698d001970c863341
http://security.debian.org/pool/updates/main/n/netkit-telnet-ssl/telnetd-ssl_0.17.17+0.1-2woody2_mipsel.deb
Size/MD5 checksum: 52116 6086a1e35d1c224ece0083aaf798468a

PowerPC architecture:

http://security.debian.org/pool/updates/main/n/netkit-telnet-ssl/telnet-ssl_0.17.17+0.1-2woody2_powerpc.deb
Size/MD5 checksum: 88072 2b57b6050d961c729870c33346d5c95c
http://security.debian.org/pool/updates/main/n/netkit-telnet-ssl/telnetd-ssl_0.17.17+0.1-2woody2_powerpc.deb
Size/MD5 checksum: 48690 28bc44df1d4506e0231ece63f1ee8b86

IBM S/390 architecture:

http://security.debian.org/pool/updates/main/n/netkit-telnet-ssl/telnet-ssl_0.17.17+0.1-2woody2_s390.deb
Size/MD5 checksum: 88562 77152b7fa6062a90eb505216f1d26bab
http://security.debian.org/pool/updates/main/n/netkit-telnet-ssl/telnetd-ssl_0.17.17+0.1-2woody2_s390.deb
Size/MD5 checksum: 50266 c8deb57a9029c38d2fe5f08d11c8c466

Sun Sparc architecture:

http://security.debian.org/pool/updates/main/n/netkit-telnet-ssl/telnet-ssl_0.17.17+0.1-2woody2_sparc.deb
Size/MD5 checksum: 89212 7b810e8f0f16651b4c1d0e5bd4142031
http://security.debian.org/pool/updates/main/n/netkit-telnet-ssl/telnetd-ssl_0.17.17+0.1-2woody2_sparc.deb
Size/MD5 checksum: 54466 b82619bdb5299873a25cbbedf541ff15

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