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Last updated: Sat May 25 08:05:20 EDT 2013

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National Cyber Awareness System

Vulnerability Summary for CVE-2009-3295

Original release date:12/29/2009
Last revised:06/29/2010
Source: US-CERT/NIST

Overview

The prep_reprocess_req function in kdc/do_tgs_req.c in the cross-realm referral implementation in the Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) 1.7 before 1.7.1 allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via a ticket request.

Impact

CVSS Severity (version 2.0):
CVSS v2 Base Score:5.0 (MEDIUM) (AV:N/AC:L/Au:N/C:N/I:N/A:P) (legend)
Impact Subscore: 2.9
Exploitability Subscore: 10.0
CVSS Version 2 Metrics:
Access Vector: Network exploitable
Access Complexity: Low
Authentication: Not required to exploit
Impact Type:Allows disruption of serviceUnknown

Vendor Statements (disclaimer)

Official Statement from Red Hat (01/11/2010)
Not vulnerable. This issue did not affect the versions of krb5 as shipped with Red Hat Enterprise Linux 3, 4, or 5.

References to Advisories, Solutions, and Tools

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External Source: VUPEN
Name: ADV-2009-3652
Type: Advisory; Patch Information
Hyperlink:http://www.vupen.com/english/advisories/2009/3652
External Source: BID
Name: 37486
Type: Patch Information
Hyperlink:http://www.securityfocus.com/bid/37486
External Source: BUGTRAQ
Name: 20091228 MITKRB5-SA-2009-003 [CVE-2009-3295] KDC denial of service in cross-realm referral processing
Type: Patch Information
Hyperlink:http://www.securityfocus.com/archive/1/archive/1/508622/100/0/threaded
External Source: CONFIRM
Name: http://web.mit.edu/kerberos/advisories/MITKRB5-SA-2009-003.txt
Type: Advisory; Patch Information
Hyperlink:http://web.mit.edu/kerberos/advisories/MITKRB5-SA-2009-003.txt
External Source: SECTRACK
Name: 1023392
Hyperlink:http://securitytracker.com/id?1023392
External Source: SECUNIA
Name: 37977
Type: Advisory
Hyperlink:http://secunia.com/advisories/37977

Vulnerable software and versions

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spacerspacerNav control image* cpe:/a:mit:kerberos:5-1.7
* Denotes Vulnerable Software
* Changes related to vulnerability configurations

Technical Details

Vulnerability Type (View All)
CVE Standard Vulnerability Entry:http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-3295