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Category:Red Hat Local Security Checks
Title:RedHat Security Advisory RHSA-2009:0408
The remote host is missing updates announced in
advisory RHSA-2009:0408.

Kerberos is a network authentication system which allows clients and
servers to authenticate to each other using symmetric encryption and a
trusted third party, the Key Distribution Center (KDC). The Generic
Security Service Application Program Interface (GSS-API) definition
provides security services to callers (protocols) in a generic fashion. The
Simple and Protected GSS-API Negotiation (SPNEGO) mechanism is used by
GSS-API peers to choose from a common set of security mechanisms.

An input validation flaw was found in the ASN.1 (Abstract Syntax Notation
One) decoder used by MIT Kerberos. A remote attacker could use this flaw to
crash a network service using the MIT Kerberos library, such as kadmind or
krb5kdc, by causing it to dereference or free an uninitialized pointer.

Multiple input validation flaws were found in the MIT Kerberos GSS-API
library's implementation of the SPNEGO mechanism. A remote attacker could
use these flaws to crash any network service utilizing the MIT Kerberos
GSS-API library to authenticate users or, possibly, leak portions of the
service's memory. (CVE-2009-0844, CVE-2009-0845)

All krb5 users should upgrade to these updated packages, which contain
backported patches to correct these issues. All running services using the
MIT Kerberos libraries must be restarted for the update to take effect.

Please note that this update is available via
Red Hat Network. To use Red Hat Network, launch the Red
Hat Update Agent with the following command: up2date

CVSS Score:

CVSS Vector:

Cross-Ref: Common Vulnerability Exposure (CVE) ID: CVE-2009-0844
BugTraq ID: 34408
Bugtraq: 20090407 MITKRB5-SA-2009-001: multiple vulnerabilities in SPNEGO, ASN.1 decoder [CVE-2009-0844 CVE-2009-0845 CVE-2009-0847] (Google Search)
Bugtraq: 20090407 rPSA-2009-0058-1 krb5 krb5-server krb5-services krb5-test krb5-workstation (Google Search)
Cert/CC Advisory: TA09-133A
CERT/CC vulnerability note: VU#662091
Common Vulnerability Exposure (CVE) ID: CVE-2009-0845
BugTraq ID: 34257
XForce ISS Database: kerberos-spnego-dos(49448)
Common Vulnerability Exposure (CVE) ID: CVE-2009-0846
BugTraq ID: 34409
Bugtraq: 20090407 MITKRB5-SA-2009-002: ASN.1 decoder frees uninitialized pointer [CVE-2009-0846] (Google Search)
Bugtraq: 20090701 VMSA-2009-0008 ESX Service Console update for krb5 (Google Search)
HPdes Security Advisory: HPSBOV02682
HPdes Security Advisory: HPSBUX02421
HPdes Security Advisory: SSRT090047
HPdes Security Advisory: SSRT100495
RedHat Security Advisories: RHSA-2009:0409
RedHat Security Advisories: RHSA-2009:0410
CopyrightCopyright (c) 2009 E-Soft Inc.

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