Debian Security Advisory

DSA-075-1 netkit-telnet-ssl -- remote exploit

Date Reported:

14 Aug 2001

Affected Packages:

netkit-telnet-ssl

Vulnerable:

Yes

Security database references:

In Mitre's CVE dictionary: CVE-2001-0554.

More information:

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@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.

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

Fixed in:

Debian GNU/Linux 2.2 (potato)

Source:: http://security.debian.org/dists/stable/updates/main/source/netkit-telnet-ssl_0.16.3-1.1.diff.gz; http://security.debian.org/dists/stable/updates/main/source/netkit-telnet-ssl_0.16.3-1.1.dsc; http://security.debian.org/dists/stable/updates/main/source/netkit-telnet-ssl_0.16.3.orig.tar.gz
Alpha:: http://security.debian.org/dists/stable/updates/main/binary-alpha/ssltelnet_0.16.3-1.1_alpha.deb; http://security.debian.org/dists/stable/updates/main/binary-alpha/telnet-ssl_0.16.3-1.1_alpha.deb; http://security.debian.org/dists/stable/updates/main/binary-alpha/telnetd-ssl_0.16.3-1.1_alpha.deb
ARM:: http://security.debian.org/dists/stable/updates/main/binary-arm/ssltelnet_0.16.3-1.1_arm.deb; http://security.debian.org/dists/stable/updates/main/binary-arm/telnet-ssl_0.16.3-1.1_arm.deb; http://security.debian.org/dists/stable/updates/main/binary-arm/telnetd-ssl_0.16.3-1.1_arm.deb
Intel IA-32:: http://security.debian.org/dists/stable/updates/main/binary-i386/ssltelnet_0.16.3-1.1_i386.deb; http://security.debian.org/dists/stable/updates/main/binary-i386/telnet-ssl_0.16.3-1.1_i386.deb; http://security.debian.org/dists/stable/updates/main/binary-i386/telnetd-ssl_0.16.3-1.1_i386.deb
Motorola 680x0:: http://security.debian.org/dists/stable/updates/main/binary-m68k/ssltelnet_0.16.3-1.1_m68k.deb; http://security.debian.org/dists/stable/updates/main/binary-m68k/telnet-ssl_0.16.3-1.1_m68k.deb; http://security.debian.org/dists/stable/updates/main/binary-m68k/telnetd-ssl_0.16.3-1.1_m68k.deb
PowerPC:: http://security.debian.org/dists/stable/updates/main/binary-powerpc/ssltelnet_0.16.3-1.1_powerpc.deb; http://security.debian.org/dists/stable/updates/main/binary-powerpc/telnet-ssl_0.16.3-1.1_powerpc.deb; http://security.debian.org/dists/stable/updates/main/binary-powerpc/telnetd-ssl_0.16.3-1.1_powerpc.deb
Sun Sparc:: http://security.debian.org/dists/stable/updates/main/binary-sparc/ssltelnet_0.16.3-1.1_sparc.deb; http://security.debian.org/dists/stable/updates/main/binary-sparc/telnet-ssl_0.16.3-1.1_sparc.deb; http://security.debian.org/dists/stable/updates/main/binary-sparc/telnetd-ssl_0.16.3-1.1_sparc.deb

MD5 checksums of the listed files are available in the original advisory.
MD5 checksums of the listed files are available in the revised advisory.