Amazon Linux AMI : krb5 (ALAS-2017-793)

medium Nessus Plugin ID 97023

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VPR Score: 3.6

Synopsis

The remote Amazon Linux AMI host is missing a security update.

Description

A NULL pointer dereference flaw was found in MIT Kerberos kadmind service. An authenticated attacker with permission to modify a principal entry could use this flaw to cause kadmind to dereference a NULL pointer and crash by supplying an empty DB argument to the modify_principal command, if kadmind was configured to use the LDAP KDB module. (CVE-2016-3119)

A NULL pointer dereference flaw was found in MIT Kerberos krb5kdc service. An authenticated attacker could use this flaw to cause krb5kdc to dereference a NULL pointer and crash by making an S4U2Self request, if the restrict_anonymous_to_tgt option was set to true.
(CVE-2016-3120)

Solution

Run 'yum update krb5' to update your system.

See Also

https://alas.aws.amazon.com/ALAS-2017-793.html

Plugin Details

Severity: Medium

ID: 97023

File Name: ala_ALAS-2017-793.nasl

Version: 3.4

Type: local

Agent: unix

Published: 2/7/2017

Updated: 4/19/2018

Dependencies: ssh_get_info.nasl

Risk Information

Risk Factor: Medium

VPR Score: 3.6

CVSS v2.0

Base Score: 4

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

CVSS v3.0

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:amazon:linux:*:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:krb5-debuginfo:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:krb5-devel:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:krb5-libs:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:krb5-server:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:krb5-server-ldap:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:krb5-workstation:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:libkadm5:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:krb5-pkinit-openssl:*:*:*:*:*:*:*

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

Patch Publication Date: 2/6/2017

Reference Information

CVE: CVE-2016-3119, CVE-2016-3120

IAVB: 2016-B-0115

ALAS: 2017-793