Debian Security Advisory

DSA-569-1 netkit-telnet-ssl -- invalid free(3)

Date Reported:
18 Oct 2004
Affected Packages:
Security database references:
In the Debian bugtracking system: Bug 273694.
In Mitre's CVE dictionary: CVE-2004-0911.
More information:

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.

Fixed in:

Debian GNU/Linux 3.0 (woody)

Intel IA-32:
Intel IA-64:
Motorola 680x0:
Big endian MIPS:
Little endian MIPS:
IBM S/390:
Sun Sparc:

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