Articles / Debian: telnetd-ssl AYT buf…

Debian: telnetd-ssl AYT buffer overflow

The telnet daemon contained in the netkit-telnet-ssl_0.16.3-1 package in the 'stable' (potato) distribution of Debian GNU/Linux is vulnerable to an exploitable overflow in its output handling. The original bug was found by <scut at nb.in-berlin.de>, and announced to bugtraq on Jul 18 2001. At that time, netkit-telnet versions after 0.14 were not believed to be vulnerable. On Aug 10 2001, zen-parse posted an advisory based on the same problem, for all netkit-telnet versions below 0.17. More details can be found on SecurityFocus. As Debian uses the 'telnetd' user to run in.telnetd, this is not a remote root compromise on Debian systems; the 'telnetd' user can be compromised. Fixed packages can be found at security.debian.org.
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- ------------------------------------------------------------------------
Debian Security Advisory DSA-075-1                   security@debian.org
http://www.debian.org/security/                    Robert van der Meulen
August 14, 2001
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Package        : netkit-telnet-ssl
Problem type   : remote exploit
Debian-specific: no

The telnet daemon contained in the netkit-telnet-ssl_0.16.3-1 package in
the 'stable' (potato) distribution of Debian GNU/Linux is vulnerable to an
exploitable overflow in its output handling.
The original bug was found by , and announced to
bugtraq on Jul 18 2001. At that time, netkit-telnet versions after 0.14 were
not believed to be vulnerable.
On Aug 10 2001, zen-parse posted an advisory based on the same problem, for
all netkit-telnet versions below 0.17.
More details can be found on http://www.securityfocus.com/archive/1/203000 .
As Debian uses the 'telnetd' user to run in.telnetd, this is not a remote
root compromise on Debian systems; the 'telnetd' user can be compromised.

We strongly advise you update your netkit-telnet-ssl packages to the versions
listed below.

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


Debian GNU/Linux 2.2 alias potato
- ---------------------------------

  Potato was released for alpha, arm, i386, m68k, powerpc and sparc.

  Source archives:
    http://security.debian.org/dists/stable/updates/main/source/netkit-telnet-ssl_0.16.3-1.1.diff.gz
      MD5 checksum: 953d3006b9491a441799f73633a72f05
    http://security.debian.org/dists/stable/updates/main/source/netkit-telnet-ssl_0.16.3-1.1.dsc
      MD5 checksum: aed9ded4b4d69dd852dfd5320a8a9cf5
    http://security.debian.org/dists/stable/updates/main/source/netkit-telnet-ssl_0.16.3.orig.tar.gz
      MD5 checksum: 999a416e11e9a9750b0ec2428eeabe1d

  Alpha architecture:
    http://security.debian.org/dists/stable/updates/main/binary-alpha/ssltelnet_0.16.3-1.1_alpha.deb
      MD5 checksum: 92680b907a65008e04cc0cf16ce1d87f
    http://security.debian.org/dists/stable/updates/main/binary-alpha/telnet-ssl_0.16.3-1.1_alpha.deb
      MD5 checksum: 4d4f6e8ee1e06eacb416de4733f45170
    http://security.debian.org/dists/stable/updates/main/binary-alpha/telnetd-ssl_0.16.3-1.1_alpha.deb
      MD5 checksum: dec52e65bb6304fd353e2af33adedb7c

  ARM architecture:
    http://security.debian.org/dists/stable/updates/main/binary-arm/ssltelnet_0.16.3-1.1_arm.deb
      MD5 checksum: 668f8343d7e6ed824a55d8510723cc2a
    http://security.debian.org/dists/stable/updates/main/binary-arm/telnet-ssl_0.16.3-1.1_arm.deb
      MD5 checksum: c3bacf45513033a66bfefcf370e295c9
    http://security.debian.org/dists/stable/updates/main/binary-arm/telnetd-ssl_0.16.3-1.1_arm.deb
      MD5 checksum: 3241dbd7380b97edec177305694891ae

  Intel IA-32 architecture:
    http://security.debian.org/dists/stable/updates/main/binary-i386/ssltelnet_0.16.3-1.1_i386.deb
      MD5 checksum: aec70bdc25994a1a885fac130a426ddc
    http://security.debian.org/dists/stable/updates/main/binary-i386/telnet-ssl_0.16.3-1.1_i386.deb
      MD5 checksum: 4b97d30b1417a9e2ebb8d941c9486451
    http://security.debian.org/dists/stable/updates/main/binary-i386/telnetd-ssl_0.16.3-1.1_i386.deb
      MD5 checksum: a6d456dc0a9789436dd4f92ace9dadf6

  Motorola 680x0 architecture:
    http://security.debian.org/dists/stable/updates/main/binary-m68k/ssltelnet_0.16.3-1.1_m68k.deb
      MD5 checksum: a38f77d83afc1daeb9b23a91cdd90478
    http://security.debian.org/dists/stable/updates/main/binary-m68k/telnet-ssl_0.16.3-1.1_m68k.deb
      MD5 checksum: 0cb485fb260ac74b411b8b82bd299d04
    http://security.debian.org/dists/stable/updates/main/binary-m68k/telnetd-ssl_0.16.3-1.1_m68k.deb
      MD5 checksum: 3c6cfd4542145edac7a9c4b55a59a896

  PowerPC architecture:
    http://security.debian.org/dists/stable/updates/main/binary-powerpc/ssltelnet_0.16.3-1.1_powerpc.deb
      MD5 checksum: 983ec249db831da8f01e730f5265207e
    http://security.debian.org/dists/stable/updates/main/binary-powerpc/telnet-ssl_0.16.3-1.1_powerpc.deb
      MD5 checksum: f069f9a731337b7bcc60db23ca2707ee
    http://security.debian.org/dists/stable/updates/main/binary-powerpc/telnetd-ssl_0.16.3-1.1_powerpc.deb
      MD5 checksum: 3627da7c28bb071a157f2cab29bd4ad9

  Sun Sparc architecture:
    http://security.debian.org/dists/stable/updates/main/binary-sparc/ssltelnet_0.16.3-1.1_sparc.deb
      MD5 checksum: 7c108a2fd7d4a86513baa3849076882a
    http://security.debian.org/dists/stable/updates/main/binary-sparc/telnet-ssl_0.16.3-1.1_sparc.deb
      MD5 checksum: 8951b3d32c086ba5fe81a3f62578dd89
    http://security.debian.org/dists/stable/updates/main/binary-sparc/telnetd-ssl_0.16.3-1.1_sparc.deb
      MD5 checksum: 5ca8897ae2bb3afeb3a0c1b0f34677bc

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

For not yet released architectures please refer to the appropriate
directory ftp://ftp.debian.org/debian/dists/sid/binary-$arch/ .

- -- 
- ----------------------------------------------------------------------------
apt-get: deb http://security.debian.org/ stable/updates main
dpkg-ftp: ftp://security.debian.org/debian-security dists/stable/updates/main
Mailing list: debian-security-announce@lists.debian.org
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