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.
Vulnerability Assessment Details
NetKit-telnetd: buffer overflows in telnet and telnetd
Detailed Explanation for this Vulnerability Assessment
The remote host is affected by the vulnerability described in GLSA-200410-03
(NetKit-telnetd: buffer overflows in telnet and telnetd)
A possible buffer overflow exists in the parsing of option strings by the
telnet daemon, where proper bounds checking is not applied when writing to
a buffer. Additionaly, another possible buffer overflow has been found by
Josh Martin in the handling of the environment variable HOME.
A remote attacker sending a specially-crafted options string to the telnet
daemon could be able to run arbitrary code with the rights of the user
running the telnet daemon, usually root. Furthermore, a possible hacker could
make use of an overlong HOME variable to cause a buffer overflow in the
telnet client, potentially leading to the local execution of arbitrary
There is no known workaround at this time.
All NetKit-telnetd users should upgrade to the latest version:
# emerge sync
# emerge -pv ">=net-misc/netkit-telnetd-0.17-r4"
# emerge ">=net-misc/netkit-telnetd-0.17-r4"
Network Security Threat Level: High
Networks Security ID:
Vulnerability Assessment Copyright: (C) 2005 Michel Arboi
|DELL R620 8 BAY SERVER E5-2640 2.50GHZ 96GB 3 X 600GB 15K SAS H710P
|DELL POWEREDGE R730XD SERVER 12 BAY E5-2683V4 2.1GHZ 64GB 2 X 300GB 15K SAS H730
|Dell Poweredge 840 Server 1GB Intel Xeon 2.13GHz No HDD *AS IS
|DELL POWEREDGE R730 8 BAY E5-2690V3 2.6GHZ 32GB 6 X 300GB 15K 12G H730
No Discussions have been posted on this vulnerability.