DSA-556-2 netkit-telnet -- invalid free(3)

Debian Security Advisory

DSA-556-2 netkit-telnet -- invalid free(3)

Date Reported:

18 Oct 2004

Affected Packages:

netkit-telnet

Vulnerable:

Yes

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 0.17-18woody2.

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

We recommend that you upgrade your netkit-telnet package.

Fixed in:

Debian GNU/Linux 3.0 (woody)

Source:

http://security.debian.org/pool/updates/main/n/netkit-telnet/netkit-telnet_0.17-18woody2.dsc

http://security.debian.org/pool/updates/main/n/netkit-telnet/netkit-telnet_0.17-18woody2.diff.gz

http://security.debian.org/pool/updates/main/n/netkit-telnet/netkit-telnet_0.17.orig.tar.gz

Alpha:

http://security.debian.org/pool/updates/main/n/netkit-telnet/telnet_0.17-18woody2_alpha.deb

http://security.debian.org/pool/updates/main/n/netkit-telnet/telnetd_0.17-18woody2_alpha.deb

ARM:

http://security.debian.org/pool/updates/main/n/netkit-telnet/telnet_0.17-18woody2_arm.deb

http://security.debian.org/pool/updates/main/n/netkit-telnet/telnetd_0.17-18woody2_arm.deb

Intel IA-32:

http://security.debian.org/pool/updates/main/n/netkit-telnet/telnet_0.17-18woody2_i386.deb

http://security.debian.org/pool/updates/main/n/netkit-telnet/telnetd_0.17-18woody2_i386.deb

Intel IA-64:

http://security.debian.org/pool/updates/main/n/netkit-telnet/telnet_0.17-18woody2_ia64.deb

http://security.debian.org/pool/updates/main/n/netkit-telnet/telnetd_0.17-18woody2_ia64.deb

HPPA:

http://security.debian.org/pool/updates/main/n/netkit-telnet/telnet_0.17-18woody2_hppa.deb

http://security.debian.org/pool/updates/main/n/netkit-telnet/telnetd_0.17-18woody2_hppa.deb

Motorola 680x0:

http://security.debian.org/pool/updates/main/n/netkit-telnet/telnet_0.17-18woody2_m68k.deb

http://security.debian.org/pool/updates/main/n/netkit-telnet/telnetd_0.17-18woody2_m68k.deb

Big endian MIPS:

http://security.debian.org/pool/updates/main/n/netkit-telnet/telnet_0.17-18woody2_mips.deb

http://security.debian.org/pool/updates/main/n/netkit-telnet/telnetd_0.17-18woody2_mips.deb

Little endian MIPS:

http://security.debian.org/pool/updates/main/n/netkit-telnet/telnet_0.17-18woody2_mipsel.deb

http://security.debian.org/pool/updates/main/n/netkit-telnet/telnetd_0.17-18woody2_mipsel.deb

PowerPC:

http://security.debian.org/pool/updates/main/n/netkit-telnet/telnet_0.17-18woody2_powerpc.deb

http://security.debian.org/pool/updates/main/n/netkit-telnet/telnetd_0.17-18woody2_powerpc.deb

IBM S/390:

http://security.debian.org/pool/updates/main/n/netkit-telnet/telnet_0.17-18woody2_s390.deb

http://security.debian.org/pool/updates/main/n/netkit-telnet/telnetd_0.17-18woody2_s390.deb

Sun Sparc:

http://security.debian.org/pool/updates/main/n/netkit-telnet/telnet_0.17-18woody2_sparc.deb

http://security.debian.org/pool/updates/main/n/netkit-telnet/telnetd_0.17-18woody2_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.