Oracle Linux 7 : krb5 (ELSA-2016-2591)

Medium Nessus Plugin ID 94712


The remote Oracle Linux host is missing one or more security updates.


From Red Hat Security Advisory 2016:2591 :

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 Low. 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).

The following packages have been upgraded to a newer upstream version:
krb5 (1.14.1). (BZ#1292153)

Security Fix(es) :

* 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.

Additional Changes :

For detailed information on changes in this release, see the Red Hat Enterprise Linux 7.3 Release Notes linked from the References section.


Update the affected krb5 packages.

See Also

Plugin Details

Severity: Medium

ID: 94712

File Name: oraclelinux_ELSA-2016-2591.nasl

Version: $Revision: 2.4 $

Type: local

Agent: unix

Published: 2016/11/11

Modified: 2016/12/08

Dependencies: 12634

Risk Information

Risk Factor: Medium


Base Score: 4

Temporal Score: 3.3

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

Temporal Vector: CVSS2#E:F/RL:OF/RC:ND


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:oracle:linux:krb5-devel, p-cpe:/a:oracle:linux:krb5-libs, p-cpe:/a:oracle:linux:krb5-pkinit, p-cpe:/a:oracle:linux:krb5-server, p-cpe:/a:oracle:linux:krb5-server-ldap, p-cpe:/a:oracle:linux:krb5-workstation, p-cpe:/a:oracle:linux:libkadm5, cpe:/o:oracle:linux:7

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 2016/11/10

Reference Information

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

OSVDB: 136224, 142164

RHSA: 2016:2591

IAVB: 2016-B-0115