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Vulnerability Assessment & Network Security Forums |
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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 >> Gentoo Local Security Checks >> [GLSA-200410-03] NetKit-telnetd: buffer overflows in telnet and telnetd Vulnerability Assessment Details
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[GLSA-200410-03] NetKit-telnetd: buffer overflows in telnet and telnetd |
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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. Impact 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 code. Workaround There is no known workaround at this time. References: http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2001-0554 http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=264846 Solution: 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 |
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