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Last updated: 9/21/2014 12:11:31 AM

CVE Publication rate: 29.77

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National Cyber Awareness System

Vulnerability Summary for CVE-2010-4020

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

Overview

MIT Kerberos 5 (aka krb5) 1.8.x through 1.8.3 does not reject RC4 key-derivation checksums, which might allow remote authenticated users to forge a (1) AD-SIGNEDPATH or (2) AD-KDC-ISSUED signature, and possibly gain privileges, by leveraging the small key space that results from certain one-byte stream-cipher operations.

Impact

CVSS Severity (version 2.0):
CVSS v2 Base Score: 3.5 (LOW) (AV:N/AC:M/Au:S/C:N/I:P/A:N) (legend)
Impact Subscore: 2.9
Exploitability Subscore: 6.8
CVSS Version 2 Metrics:
Access Vector: Network exploitable
Access Complexity: Medium
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: CONFIRM
Name: http://kb.vmware.com/kb/1035108
External Source: OSVDB
Name: 69608
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: SECTRACK
Name: 1024803
External Source: VUPEN
Name: ADV-2010-3118
External Source: CONFIRM
Name: http://www.vmware.com/security/advisories/VMSA-2011-0007.html
External Source: BID
Name: 45117
External Source: MANDRIVA
Name: MDVSA-2010:246
External Source: REDHAT
Name: RHSA-2010:0925
External Source: CONFIRM
Name: http://web.mit.edu/kerberos/advisories/MITKRB5-SA-2010-007.txt
Type: Advisory
External Source: VUPEN
Name: ADV-2010-3095
External Source: APPLE
Name: APPLE-SA-2011-03-21-1
External Source: UBUNTU
Name: USN-1030-1
External Source: SUSE
Name: SUSE-SR:2010:023
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
External Source: VUPEN
Name: ADV-2010-3094
External Source: SECUNIA
Name: 42399
Type: Advisory
External Source: FEDORA
Name: FEDORA-2010-18425
External Source: SUSE
Name: SUSE-SR:2010:024
External Source: FEDORA
Name: FEDORA-2010-18409

Technical Details

Vulnerability Type (View All)