Amazon Linux AMI : krb5 (ALAS-2018-1129)

medium Nessus Plugin ID 121361
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VPR Score: 3.4

Synopsis

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

Description

MIT krb5 1.6 or later allows an authenticated kadmin with permission to add principals to an LDAP Kerberos database to circumvent a DN containership check by supplying both a 'linkdn' and 'containerdn' database argument, or by supplying a DN string which is a left extension of a container DN string but is not hierarchically within the container DN. (CVE-2018-5730)

MIT krb5 1.6 or later allows an authenticated kadmin with permission to add principals to an LDAP Kerberos database to cause a denial of service (NULL pointer dereference) or bypass a DN container check by supplying tagged data that is internal to the database module.
(CVE-2018-5729)

Solution

Run 'yum update krb5' to update your system.

See Also

https://alas.aws.amazon.com/ALAS-2018-1129.html

Plugin Details

Severity: Medium

ID: 121361

File Name: ala_ALAS-2018-1129.nasl

Version: 1.2

Type: local

Agent: unix

Published: 1/25/2019

Updated: 2/20/2020

Dependencies: ssh_get_info.nasl

Risk Information

Risk Factor: Medium

VPR Score: 3.4

CVSS v2.0

Base Score: 6.5

Temporal Score: 4.8

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

Temporal Vector: CVSS2#E:U/RL:OF/RC:C

CVSS v3.0

Base Score: 4.7

Temporal Score: 4.1

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

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

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

Exploit Ease: No known exploits are available

Patch Publication Date: 1/25/2019

Vulnerability Publication Date: 3/6/2018

Reference Information

CVE: CVE-2018-5729, CVE-2018-5730

ALAS: 2018-1129