CentOS 7 : krb5 (CESA-2018:0666)

medium Nessus Plugin ID 109370
New! Plugin Severity Now Using CVSS v3

The calculated severity for Plugins has been updated to use CVSS v3 by default. Plugins that do not have a CVSS v3 score will fall back to CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

Synopsis

The remote CentOS host is missing one or more security updates.

Description

An update for krb5 is now available for Red Hat Enterprise Linux 7.

Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Kerberos is a network authentication system, which can improve the security of your network by eliminating the insecure practice of sending passwords over the network in unencrypted form. It allows clients and servers to authenticate to each other with the help of a trusted third party, the Kerberos key distribution center (KDC).

Security Fix(es) :

* krb5: Authentication bypass by improper validation of certificate EKU and SAN (CVE-2017-7562)

* krb5: Invalid S4U2Self or S4U2Proxy request causes assertion failure (CVE-2017-11368)

For more details about the security issue(s), including the impact, a CVSS score, and other related information, refer to the CVE page(s) listed in the References section.

Additional Changes :

For detailed information on changes in this release, see the Red Hat Enterprise Linux 7.5 Release Notes linked from the References section.

Solution

Update the affected krb5 packages.

See Also

http://www.nessus.org/u?5c96c83a

Plugin Details

Severity: Medium

ID: 109370

File Name: centos_RHSA-2018-0666.nasl

Version: 1.4

Type: local

Agent: unix

Published: 4/27/2018

Updated: 12/31/2019

Dependencies: ssh_get_info.nasl

Risk Information

CVSS Score Source: CVE-2017-11368

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Medium

Base Score: 4

Vector: CVSS2#AV:N/AC:L/Au:S/C:N/I:N/A:P

CVSS v3

Risk Factor: Medium

Base Score: 6.5

Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Vulnerability Information

CPE: cpe:2.3:o:centos:centos:7:*:*:*:*:*:*:*, p-cpe:2.3:a:centos:centos:krb5-devel:*:*:*:*:*:*:*, p-cpe:2.3:a:centos:centos:krb5-libs:*:*:*:*:*:*:*, p-cpe:2.3:a:centos:centos:krb5-server:*:*:*:*:*:*:*, p-cpe:2.3:a:centos:centos:krb5-workstation:*:*:*:*:*:*:*, p-cpe:2.3:a:centos:centos:krb5-server-ldap:*:*:*:*:*:*:*, p-cpe:2.3:a:centos:centos:krb5-pkinit:*:*:*:*:*:*:*, p-cpe:2.3:a:centos:centos:libkadm5:*:*:*:*:*:*:*

Required KB Items: Host/local_checks_enabled, Host/CentOS/release, Host/CentOS/rpm-list

Patch Publication Date: 4/26/2018

Vulnerability Publication Date: 8/9/2017

Reference Information

CVE: CVE-2017-7562, CVE-2017-11368

RHSA: 2018:0666