Siemens SIMATIC CP Out-of-Bounds Read (CVE-2020-9272)

high Tenable OT Security Plugin ID 501105

Synopsis

The remote OT asset is affected by a vulnerability.

Description

ProFTPD 1.3.7 has an out-of-bounds (OOB) read vulnerability in mod_cap via the cap_text.c cap_to_text function.

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 recommends users update to the latest software version:

- SIMATIC NET CP 1543-1 (Incl. SIPLUS NET variants): Update to v3.0 or later

- SIMATIC CP 1545-1 (6GK7545-1GX00-0XE0): Update to v1.1 or later

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

- Disable the embedded FTP server. The server is deactivated in the default configuration.
- Limit access to Port 21/TCP to trusted IP addresses.

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 on the Siemens industrial security webpage.

For more information about this issue, please see Siemens Security Advisory SSA-679335

See Also

https://github.com/proftpd/proftpd/blob/master/RELEASE_NOTES

https://github.com/proftpd/proftpd/issues/902

http://www.nessus.org/u?b5bae8e8

https://security.gentoo.org/glsa/202003-35

https://www.cisa.gov/news-events/ics-advisories/icsa-21-222-07

https://cert-portal.siemens.com/productcert/pdf/ssa-679335.pdf

Plugin Details

Severity: High

ID: 501105

Version: 1.3

Type: remote

Family: Tenable.ot

Published: 5/2/2023

Updated: 9/4/2024

Supported Sensors: Tenable OT Security

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

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

CVSS Score Source: CVE-2020-9272

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

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

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

Vulnerability Information

CPE: cpe:/o:siemens:simatic_net_cp_1543-1_firmware, cpe:/o:siemens:simatic_net_cp_1545-1_firmware

Required KB Items: Tenable.ot/Siemens

Exploit Ease: No known exploits are available

Patch Publication Date: 2/20/2020

Vulnerability Publication Date: 2/20/2020

Reference Information

CVE: CVE-2020-9272

CWE: 125

GLSA: GLSA-202003-35

ICSA: 21-222-07

SuSE: openSUSE-SU-2020:0273