Amazon Linux AMI : krb5 (ALAS-2018-1010)

Medium Nessus Plugin ID 117342

Synopsis

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

Description

A denial of service flaw was found in MIT Kerberos krb5kdc service. An
authenticated attacker could use this flaw to cause krb5kdc to exit
with an assertion failure by making an invalid S4U2Self or S4U2Proxy
request.(CVE-2017-11368)

An authentication bypass flaw was found in the way krb5's certauth
interface handled the validation of client certificates. A remote
attacker able to communicate with the KDC could potentially use this
flaw to impersonate arbitrary principals under rare and erroneous
circumstances.(CVE-2017-7562)

Solution

Run 'yum update krb5' to update your system.

See Also

https://alas.aws.amazon.com/ALAS-2018-1010.html

Plugin Details

Severity: Medium

ID: 117342

File Name: ala_ALAS-2018-1010.nasl

Version: 1.1

Type: local

Agent: unix

Published: 2018/09/07

Modified: 2018/09/07

Dependencies: 12634

Risk Information

Risk Factor: Medium

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

Patch Publication Date: 2018/09/05

Reference Information

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

ALAS: 2018-1010