Siemens SIMATIC NET CP 443-1 OPC UA Out-of-Bounds Read (CVE-2016-2518)

medium Tenable OT Security Plugin ID 501089

Synopsis

The remote OT asset is affected by a vulnerability.

Description

The MATCH_ASSOC function in NTP before version 4.2.8p9 and 4.3.x before 4.3.92 allows remote attackers to cause an out-of-bounds reference via an addpeer request with a large hmode value.

This plugin only works with Tenable.ot.
Please visit https://www.tenable.com/products/tenable-ot for more information.

Solution

The following text was originally created by the Cybersecurity and Infrastructure Security Agency (CISA). The original can be found at CISA.gov.

Siemens has identified the following specific workarounds and mitigations users can apply to reduce the risk:

- Deactivate NTP-based time synchronization of the device, if enabled. The feature is disabled by default.
- Configure an additional firewall to prevent communication to Port UDP/123 of an affected device.

As a general security measure, Siemens strongly recommends users protect network access to devices with appropriate mechanisms. In order to operate the devices in a protected IT environment, Siemens recommends users configure the environment according to Siemens operational guidelines for industrial security, and follow the recommendations in the product manual.

Additional information on industrial security by Siemens can be found at: https://www.siemens.com/industrialsecurity

For more information about this issue, please see Siemens security advisory SSA-211752

See Also

https://www.kb.cert.org/vuls/id/718152

http://www.nessus.org/u?35946255

http://support.ntp.org/bin/view/Main/NtpBug3009

http://www.securityfocus.com/bid/88226

http://www.nessus.org/u?eb5f426b

https://security.gentoo.org/glsa/201607-15

http://www.securitytracker.com/id/1035705

http://www.debian.org/security/2016/dsa-3629

https://security.netapp.com/advisory/ntap-20171004-0002/

https://security.FreeBSD.org/advisories/FreeBSD-SA-16:16.ntp.asc

https://access.redhat.com/errata/RHSA-2016:1141

http://rhn.redhat.com/errata/RHSA-2016-1552.html

http://www.nessus.org/u?ae82f1b1

http://www.nessus.org/u?5cfd023e

https://cert-portal.siemens.com/productcert/pdf/ssa-211752.pdf

http://www.nessus.org/u?4ef1a5a8

http://www.nessus.org/u?98a21ef2

http://lists.opensuse.org/opensuse-updates/2016-05/msg00114.html

http://www.nessus.org/u?6628a33f

http://www.ubuntu.com/usn/USN-3096-1

http://www.nessus.org/u?cd1909c0

http://www.nessus.org/u?c59e7aad

http://www.securityfocus.com/archive/1/archive/1/538233/100/0/threaded

http://www.nessus.org/u?15ac6fd1

http://www.nessus.org/u?9e4e2f01

http://www.nessus.org/u?f726e331

http://www.securityfocus.com/archive/1/538233/100/0/threaded

http://www.nessus.org/u?fa0d509b

https://us-cert.cisa.gov/ics/advisories/icsa-21-159-11

https://support.f5.com/csp/article/K20804323

http://www.nessus.org/u?08f08020

http://www.nessus.org/u?89fbd39d

https://www.debian.org/security/2016/dsa-3629

Plugin Details

Severity: Medium

ID: 501089

Version: 1.2

Type: remote

Family: Tenable.ot

Published: 5/2/2023

Updated: 7/24/2023

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 1.4

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

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

CVSS Score Source: CVE-2016-2518

CVSS v3

Risk Factor: Medium

Base Score: 5.3

Temporal Score: 4.6

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

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

Vulnerability Information

CPE: cpe:/o:siemens:simatic_net_cp_443-1_opc_ua_firmware

Required KB Items: Tenable.ot/Siemens

Exploit Ease: No known exploits are available

Patch Publication Date: 1/30/2017

Vulnerability Publication Date: 1/30/2017

Reference Information

CVE: CVE-2016-2518

CWE: 125

DSA: DSA-3629

FEDORA: FEDORA-2016-5b2eb0bf9c, FEDORA-2016-ed8c6c0426

FREEBSD: FreeBSD-SA-16:16

GLSA: GLSA-201607-15

RHSA: RHSA-2016:1141, RHSA-2016:1552

SuSE: SUSE-SU-2016:1278, SUSE-SU-2016:1291, SUSE-SU-2016:1471, SUSE-SU-2016:1568, SUSE-SU-2016:1912, SUSE-SU-2016:2094, openSUSE-SU-2016:1329, openSUSE-SU-2016:1423

USN: USN-3096-1