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National Cyber-Alert System

Vulnerability Summary for CVE-2009-0845

Original release date:03/27/2009
Last revised:08/15/2009
Source: US-CERT/NIST

Overview

The spnego_gss_accept_sec_context function in lib/gssapi/spnego/spnego_mech.c in MIT Kerberos 5 (aka krb5) 1.5 through 1.6.3, when SPNEGO is used, allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via invalid ContextFlags data in the reqFlags field in a negTokenInit token.

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

References to Advisories, Solutions, and Tools

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US-CERT Technical Alert: TA09-133A
Name: TA09-133A
Hyperlink:http://www.us-cert.gov/cas/techalerts/TA09-133A.html
US-CERT Vulnerability Note: VU#662091
Name: VU#662091
Hyperlink:http://www.kb.cert.org/vuls/id/662091
External Source: FEDORA
Name: FEDORA-2009-2852
Hyperlink:https://www.redhat.com/archives/fedora-package-announce/2009-April/msg00206.html
External Source: FEDORA
Name: FEDORA-2009-2834
Hyperlink:https://www.redhat.com/archives/fedora-package-announce/2009-April/msg00205.html
External Source: XF
Name: kerberos-spnego-dos(49448)
Hyperlink:http://xforce.iss.net/xforce/xfdb/49448
External Source: VUPEN
Name: ADV-2009-2248
Hyperlink:http://www.vupen.com/english/advisories/2009/2248
External Source: VUPEN
Name: ADV-2009-1297
Hyperlink:http://www.vupen.com/english/advisories/2009/1297
External Source: VUPEN
Name: ADV-2009-1106
Hyperlink:http://www.vupen.com/english/advisories/2009/1106
External Source: VUPEN
Name: ADV-2009-1057
Hyperlink:http://www.vupen.com/english/advisories/2009/1057
External Source: VUPEN
Name: ADV-2009-0976
Hyperlink:http://www.vupen.com/english/advisories/2009/0976
External Source: VUPEN
Name: ADV-2009-0847
Type: Advisory
Hyperlink:http://www.vupen.com/english/advisories/2009/0847
External Source: UBUNTU
Name: USN-755-1
Hyperlink:http://www.ubuntu.com/usn/usn-755-1
External Source: SECTRACK
Name: 1021867
Hyperlink:http://www.securitytracker.com/id?1021867
External Source: BID
Name: 34257
Hyperlink:http://www.securityfocus.com/bid/34257
External Source: BUGTRAQ
Name: 20090407 rPSA-2009-0058-1 krb5 krb5-server krb5-services krb5-test krb5-workstation
Hyperlink:http://www.securityfocus.com/archive/1/archive/1/502546/100/0/threaded
External Source: BUGTRAQ
Name: 20090407 MITKRB5-SA-2009-001: multiple vulnerabilities in SPNEGO, ASN.1 decoder [CVE-2009-0844 CVE-2009-0845 CVE-2009-0847]
Hyperlink:http://www.securityfocus.com/archive/1/archive/1/502526/100/0/threaded
External Source: REDHAT
Name: RHSA-2009:0408
Hyperlink:http://www.redhat.com/support/errata/RHSA-2009-0408.html
External Source: MANDRIVA
Name: MDVSA-2009:082
Hyperlink:http://www.mandriva.com/security/advisories?name=MDVSA-2009:082
External Source: CONFIRM
Name: http://www-01.ibm.com/support/docview.wss?uid=swg21396120
Hyperlink:http://www-01.ibm.com/support/docview.wss?uid=swg21396120
External Source: MISC
Name: http://wiki.rpath.com/wiki/Advisories:rPSA-2009-0058
Hyperlink:http://wiki.rpath.com/wiki/Advisories:rPSA-2009-0058
External Source: CONFIRM
Name: http://wiki.rpath.com/Advisories:rPSA-2009-0058
Hyperlink:http://wiki.rpath.com/Advisories:rPSA-2009-0058
External Source: CONFIRM
Name: http://web.mit.edu/kerberos/advisories/MITKRB5-SA-2009-001.txt
Hyperlink:http://web.mit.edu/kerberos/advisories/MITKRB5-SA-2009-001.txt
External Source: MISC
Name: http://support.novell.com/docs/Readmes/InfoDocument/patchbuilder/readme_5047181.html
Hyperlink:http://support.novell.com/docs/Readmes/InfoDocument/patchbuilder/readme_5047181.html
External Source: MISC
Name: http://support.novell.com/docs/Readmes/InfoDocument/patchbuilder/readme_5047180.html
Hyperlink:http://support.novell.com/docs/Readmes/InfoDocument/patchbuilder/readme_5047180.html
External Source: CONFIRM
Name: http://support.avaya.com/elmodocs2/security/ASA-2009-142.htm
Hyperlink:http://support.avaya.com/elmodocs2/security/ASA-2009-142.htm
External Source: CONFIRM
Name: http://support.apple.com/kb/HT3549
Hyperlink:http://support.apple.com/kb/HT3549
External Source: SUNALERT
Name: 256728
Hyperlink:http://sunsolve.sun.com/search/document.do?assetkey=1-26-256728-1
External Source: CONFIRM
Name: http://src.mit.edu/fisheye/changelog/krb5/?cs=22084
Type: Advisory
Hyperlink:http://src.mit.edu/fisheye/changelog/krb5/?cs=22084
External Source: CONFIRM
Name: http://src.mit.edu/fisheye/browse/krb5/trunk/src/lib/gssapi/spnego/spnego_mech.c?r1=21875&r2=22084
Hyperlink:http://src.mit.edu/fisheye/browse/krb5/trunk/src/lib/gssapi/spnego/spnego_mech.c?r1=21875&r2=22084
External Source: GENTOO
Name: GLSA-200904-09
Hyperlink:http://security.gentoo.org/glsa/glsa-200904-09.xml
External Source: SECUNIA
Name: 35074
Hyperlink:http://secunia.com/advisories/35074
External Source: SECUNIA
Name: 34734
Hyperlink:http://secunia.com/advisories/34734
External Source: SECUNIA
Name: 34640
Hyperlink:http://secunia.com/advisories/34640
External Source: SECUNIA
Name: 34637
Hyperlink:http://secunia.com/advisories/34637
External Source: SECUNIA
Name: 34630
Hyperlink:http://secunia.com/advisories/34630
External Source: SECUNIA
Name: 34628
Hyperlink:http://secunia.com/advisories/34628
External Source: SECUNIA
Name: 34622
Hyperlink:http://secunia.com/advisories/34622
External Source: SECUNIA
Name: 34617
Hyperlink:http://secunia.com/advisories/34617
External Source: SECUNIA
Name: 34594
Hyperlink:http://secunia.com/advisories/34594
External Source: SECUNIA
Name: 34347
Type: Advisory
Hyperlink:http://secunia.com/advisories/34347
External Source: APPLE
Name: APPLE-SA-2009-05-12
Hyperlink:http://lists.apple.com/archives/security-announce/2009/May/msg00002.html
External Source: CONFIRM
Name: http://krbdev.mit.edu/rt/Ticket/Display.html?user=guest&pass=guest&id=6402
Hyperlink:http://krbdev.mit.edu/rt/Ticket/Display.html?user=guest&pass=guest&id=6402

Vulnerable software and versions

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spacerspacerNav control image* cpe:/a:mit:kerberos:5-1.6.3
* 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-2009-0845