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Vulnerability Details : CVE-2009-0845

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.
Publish Date : 2009-03-27 Last Update Date : 2018-10-10
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- CVSS Scores & Vulnerability Types

CVSS Score
Confidentiality Impact None (There is no impact to the confidentiality of the system.)
Integrity Impact None (There is no impact to the integrity of the system)
Availability Impact Partial (There is reduced performance or interruptions in resource availability.)
Access Complexity Low (Specialized access conditions or extenuating circumstances do not exist. Very little knowledge or skill is required to exploit. )
Authentication Not required (Authentication is not required to exploit the vulnerability.)
Gained Access None
Vulnerability Type(s) Denial Of Service

- Additional Vendor Supplied Data

Vendor Impact CVSS Score CVSS Vector Report Date Publish Date
Redhat important
AV:N/AC:M/Au:N/C:P/I:N/A:P 2009-03-13 2009-03-13
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- Related OVAL Definitions

Title Definition Id Class Family
CVE-2009-0845 unix
DSA-1766 krb5 -- several vulnerabilities oval:org.mitre.oval:def:8181 unix
DSA-1766-1 krb5 -- several oval:org.mitre.oval:def:13177 unix
ELSA-2009:0408: krb5 security update (Important) oval:org.mitre.oval:def:22765 unix
Kerberos GSS-API SPNEGO Null Pointer Dereference and Invalid Memory Access Bugs Let Remote Denial of Service oval:org.mitre.oval:def:6449 unix
RHSA-2009:0408 -- krb5 security update (Important) oval:org.mitre.oval:def:28421 unix
RHSA-2009:0408: krb5 security update (Important) oval:com.redhat.rhsa:def:20090408 unix
The spnego_gss_accept_sec_context function in lib/gssapi/spnego/spnego_mech.c in MIT Kerberos 5 (aka krb5) 1.5 through 1... oval:org.mitre.oval:def:10044 unix
USN-755-1 -- krb5 vulnerabilities oval:org.mitre.oval:def:13874 unix
OVAL (Open Vulnerability and Assessment Language) definitions define exactly what should be done to verify a vulnerability or a missing patch. Check out the OVAL definitions if you want to learn what you should do to verify a vulnerability.

- Products Affected By CVE-2009-0845

# Product Type Vendor Product Version Update Edition Language
1 Application MIT Kerberos 5-1.5 Version Details Vulnerabilities
2 Application MIT Kerberos 5-1.5.1 Version Details Vulnerabilities
3 Application MIT Kerberos 5-1.5.2 Version Details Vulnerabilities
4 Application MIT Kerberos 5-1.5.3 Version Details Vulnerabilities
5 Application MIT Kerberos 5-1.6 Version Details Vulnerabilities
6 Application MIT Kerberos 5-1.6.1 Version Details Vulnerabilities
7 Application MIT Kerberos 5-1.6.2 Version Details Vulnerabilities
8 Application MIT Kerberos 5-1.6.3 Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
MIT Kerberos 8

- References For CVE-2009-0845
XF kerberos-spnego-dos(49448)
VUPEN ADV-2009-2248
VUPEN ADV-2009-0847
VUPEN ADV-2009-0976
VUPEN ADV-2009-1057
VUPEN ADV-2009-1106
VUPEN ADV-2009-1297
CERT TA09-133A
BID 34257 MIT Kerberos 'NegTokenInit' Token Handling Remote Denial Of Service Vulnerability Release Date:2013-01-31
SECTRACK 1021867
BUGTRAQ 20090407 rPSA-2009-0058-1 krb5 krb5-server krb5-services krb5-test krb5-workstation
REDHAT RHSA-2009:0408
BUGTRAQ 20090407 MITKRB5-SA-2009-001: multiple vulnerabilities in SPNEGO, ASN.1 decoder [CVE-2009-0844 CVE-2009-0845 CVE-2009-0847] CONFIRM
CERT-VN VU#662091
APPLE APPLE-SA-2009-05-12

- Metasploit Modules Related To CVE-2009-0845

There are not any metasploit modules related to this CVE entry (Please visit for more information)

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