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Last updated: 9/18/2014 1:46:02 PM

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National Cyber Awareness System

Vulnerability Summary for CVE-2010-4021

Original release date: 12/02/2010
Last revised: 05/04/2011
Source: US-CERT/NIST

Overview

The Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) 1.7 does not properly restrict the use of TGT credentials for armoring TGS requests, which might allow remote authenticated users to impersonate a client by rewriting an inner request, aka a "KrbFastReq forgery issue."

Impact

CVSS Severity (version 2.0):
CVSS v2 Base Score: 2.1 (LOW) (AV:N/AC:H/Au:S/C:N/I:P/A:N) (legend)
Impact Subscore: 2.9
Exploitability Subscore: 3.9
CVSS Version 2 Metrics:
Access Vector: Network exploitable
Access Complexity: High
Authentication: Required to exploit
Impact Type: Allows unauthorized modification

References to Advisories, Solutions, and Tools

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External Source: BUGTRAQ
Name: 20101130 MITKRB5-SA-2010-007 Multiple checksum handling vulnerabilities [CVE-2010-1324 CVE-2010-1323 CVE-2010-4020 CVE-2010-4021]
External Source: CONFIRM
Name: http://support.apple.com/kb/HT4581
External Source: SUSE
Name: SUSE-SR:2010:024
External Source: VUPEN
Name: ADV-2010-3118
External Source: APPLE
Name: APPLE-SA-2011-03-21-1
External Source: BUGTRAQ
Name: 20110428 VMSA-2011-0007 VMware ESXi and ESX Denial of Service and third party updates for Likewise components and ESX Service Console
External Source: CONFIRM
Name: http://web.mit.edu/kerberos/advisories/MITKRB5-SA-2010-007.txt
Type: Advisory
External Source: SECTRACK
Name: 1024803
External Source: VUPEN
Name: ADV-2010-3094
External Source: CONFIRM
Name: http://kb.vmware.com/kb/1035108
External Source: CONFIRM
Name: http://www.vmware.com/security/advisories/VMSA-2011-0007.html
External Source: SUSE
Name: SUSE-SR:2010:023
External Source: UBUNTU
Name: USN-1030-1
External Source: MANDRIVA
Name: MDVSA-2010:246
External Source: OSVDB
Name: 69607
External Source: BID
Name: 45122
External Source: MLIST
Name: [security-announce] 20110428 VMSA-2011-0007 VMware ESXi and ESX Denial of Service and third party updates for Likewise components and ESX Service Console

Vulnerable software and versions

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Technical Details

Vulnerability Type (View All)
  • Configuration (CWE-16)
  • Permissions, Privileges, and Access Control (CWE-264)