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    CVE-2001-1444

    The Kerberos Telnet protocol, as implemented by KTH Kerberos IV and Kerberos V (Heimdal), does not encrypt authentication and encryption options sent from the server, which allows remote attackers to downgrade authentication and encryption mechanisms via a man-in-the-middle attack.

    Published:Aug 27, 2001
    Last Modified:Apr 16, 2026
    EPS:Apr 21, 2005
    EPSS Score:0.00859
    CVSS Score:7.5

    Affected Products

    Vendor
    Kth
    Product
    Kth Kerberos

    Exploits

    http://josefsson.org/ktelnet/kerberos-telnet.htmlhttp://josefsson.org/ktelnet/kerberos-telnet.html

    Common Weakness Enumeration

    No CWE recorded yet

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

    CVE-2002-0600 (CVSS 7.5) — Heap overflow in the KTH Kerberos 4 FTP client 4-1.1.1 allows remote malicious servers to execute arbitrary co…
    CVE-2001-1443 (CVSS 5) — KTH Kerberos IV and Kerberos V (Heimdal) for Telnet clients do not encrypt connections if the server does not …
    CVE-2001-0033 (CVSS 7.2) — KTH Kerberos IV allows local users to change the configuration of a Kerberos server running at an elevated pri…
    CVE-2001-0035 (CVSS 7.2) — Buffer overflow in the kdc_reply_cipher function in KTH Kerberos IV allows remote attackers to cause a denial …
    CVE-2001-0034 (CVSS 7.2) — KTH Kerberos IV allows local users to specify an alternate proxy using the krb4_proxy variable, which allows t…
    CVE-2001-0036 (CVSS 1.2) — KTH Kerberos IV allows local users to overwrite arbitrary files via a symlink attack on a ticket file.…
    CVE-1999-1099 (CVSS 5) — Kerberos 4 allows remote attackers to obtain sensitive information via a malformed UDP packet that generates a…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High