RHEL 2.1 / 3 / 4 : telnet (RHSA-2005:327)

High Nessus Plugin ID 17645


The remote Red Hat host is missing one or more security updates.


Updated telnet packages that fix two buffer overflow vulnerabilities are now available.

This update has been rated as having important security impact by the Red Hat Security Response Team.

The telnet package provides a command line telnet client. The telnet-server package includes a telnet daemon, telnetd, that supports remote login to the host machine.

Two buffer overflow flaws were discovered in the way the telnet client handles messages from a server. An attacker may be able to execute arbitrary code on a victim's machine if the victim can be tricked into connecting to a malicious telnet server. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the names CVE-2005-0468 and CVE-2005-0469 to these issues.

Additionally, the following bugs have been fixed in these erratum packages for Red Hat Enterprise Linux 2.1 and Red Hat Enterprise Linux 3 :

- telnetd could loop on an error in the child side process

- There was a race condition in telnetd on a wtmp lock on some occasions

- The command line in the process table was sometimes too long and caused bad output from the ps command

- The 8-bit binary option was not working

Users of telnet should upgrade to this updated package, which contains backported patches to correct these issues.

Red Hat would like to thank iDEFENSE for their responsible disclosure of this issue.


Update the affected telnet and / or telnet-server packages.

See Also






Plugin Details

Severity: High

ID: 17645

File Name: redhat-RHSA-2005-327.nasl

Version: $Revision: 1.21 $

Type: local

Agent: unix

Published: 2005/03/29

Modified: 2016/12/28

Dependencies: 12634

Risk Information

Risk Factor: High


Base Score: 7.5

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P

Vulnerability Information

CPE: p-cpe:/a:redhat:enterprise_linux:telnet, p-cpe:/a:redhat:enterprise_linux:telnet-server, cpe:/o:redhat:enterprise_linux:2.1, cpe:/o:redhat:enterprise_linux:3, cpe:/o:redhat:enterprise_linux:4

Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list, Host/cpu

Patch Publication Date: 2005/03/28

Vulnerability Publication Date: 2005/03/28

Reference Information

CVE: CVE-2005-0468, CVE-2005-0469

OSVDB: 15093, 15094

RHSA: 2005:327