Kerberos IV brute force
| kerberos-bf (64) |  Medium Risk |
Description:
Using the Kerberos IV Brute Force attack, the Kerberos IV Key Distribution Center (KDC) enables anyone to request a ticket-granting ticket. Due to certain parts of the ticket contents being known, and the ticket being encrypted with the user's password, attackers can mount a brute force attack on the KDC.
Platforms Affected:
- Compaq, Tru64
- Data General, DG/UX
- HP, HP-UX
- IBM, AIX
- Linux, Kernel
- Microsoft, Windows 95
- Microsoft, Windows 98
- Microsoft, Windows 98SE
- Microsoft, Windows Me
- Microsoft, Windows NT 4.0
- MIT, Kerberos 4
- SGI, IRIX
- Sun, Solaris
- WindRiver, BSDOS
Remedy:
Upgrade to the latest version of Kerberos, available from the Kerberos Web site. See References.
Consequences:
Obtain Information
References:
- CERT Advisory CA-1996-03, Vulnerability in Kerberos 4 Key Server at http://www.cert.org/advisories/CA-1996-03.html.
- Kerberos Web site, Kerberos: The Network Authentication Protocol at http://web.mit.edu/kerberos/www/.
- Massachusetts Institute of Technology Web site, Kerberos: The Network Authentication Protocol at http://web.mit.edu/kerberos/www/.
- BID-2351: Kerberos 4 Valid Username and Realm Disclosure Vulnerability
- CVE-1999-0143: Kerberos 4 key servers allow a user to masquerade as another by breaking and generating session keys.
Reported:
Feb 21, 1996
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