Vulnerability Assessment & Network Security Forums

If through a vulnerability assessment, a network security issue is detected for the vulnerability below, applying the appropriate security patches in a timely matter is very important. If you have detected that your system has already been compromised, following CERT's Network Security recovery document will assist with recommended steps for system recovery.

Home >> Browse Vulnerability Assessment Database >> Ubuntu Local Security Checks >> USN101-1 : netkit-telnet vulnerabilities

Vulnerability Assessment Details

USN101-1 : netkit-telnet vulnerabilities

Vulnerability Assessment Summary
netkit-telnet vulnerabilities

Detailed Explanation for this Vulnerability Assessment

Summary :

These remote packages are missing security patches :
- telnet
- telnetd

Description :

A buffer overflow was discovered in the telnet client's handling of
the LINEMODE suboptions. By sending a specially constructed reply
containing a large number of SLC (Set Local Character) commands, a
remote attacker (i. e. a malicious telnet server) could execute
arbitrary commands with the rights of the user running the telnet
client. (CVE-2005-0469)

Michal Zalewski discovered a Denial of Service vulnerability in the
telnet server (telnetd). A remote attacker could cause the telnetd
process to free an invalid pointer, which caused the server process to
crash, leading to a denial of service (inetd will disable the service
if telnetd crashed repeatedly), or possibly the execution of arbitrary
code with the rights of the telnetd process (by default,
the 'telnetd' user). Please note that the telnet server is not
officially supported by Ubuntu, it is in the "universe"
component. (CVE-2004-0911)

Solution :

Upgrade to :
- telnet-0.17-24ubuntu0.1 (Ubuntu 4.10)
- telnetd-0.17-24ubuntu0.1 (Ubuntu 4.10)

Network Security Threat Level: High

Networks Security ID:

Vulnerability Assessment Copyright: Ubuntu Security Notice (C) 2005 Canonical, Inc. / NASL script (C) 2005 Michel Arboi

Cables, Connectors