Detections
Analytics
CentOS 5 : krb5 (CESA-2009:0408)
critical Nessus Plugin ID 43739
Language:
Synopsis
The remote CentOS host is missing one or more security updates.Description
Updated krb5 packages that fix various security issues are now available for Red Hat Enterprise Linux 5.This update has been rated as having important security impact by the Red Hat Security Response Team.
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. (CVE-2009-0846)
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.
Solution
Update the affected krb5 packages.See Also
Plugin Details
Severity: Critical
ID: 43739
File Name: centos_RHSA-2009-0408.nasl
Version: 1.14
Type: local
Agent: unix
Family: CentOS Local Security Checks
Published: 1/6/2010
Updated: 1/4/2021
Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus
Risk Information
VPR
Risk Factor: High
Score: 7.4
CVSS v2
Risk Factor: Critical
Base Score: 10
Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C
Vulnerability Information
CPE: p-cpe:/a:centos:centos:krb5-workstation, p-cpe:/a:centos:centos:krb5-devel, p-cpe:/a:centos:centos:krb5-libs, p-cpe:/a:centos:centos:krb5-server, cpe:/o:centos:centos:5
Required KB Items: Host/local_checks_enabled, Host/CentOS/release, Host/CentOS/rpm-list
Patch Publication Date: 4/8/2009
Vulnerability Publication Date: 3/27/2009
Reference Information
CVE: CVE-2009-0844, CVE-2009-0845, CVE-2009-0846, CVE-2009-0847