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Siemens SCALANCE LPE9403 Race Condition (CVE-2021-36221)

medium Tenable OT Security Plugin ID 501052

Synopsis

The remote OT asset is affected by a vulnerability.

Description

Go before 1.15.15 and 1.16.x before 1.16.7 has a race condition that can lead to a net/http/httputil ReverseProxy panic upon an ErrAbortHandler abort.

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 of the affected product update to Version 2.0 or later.

As a general security measure, Siemens recommends protecting network access to devices with appropriate mechanisms. To operate the devices in a protected IT environment, Siemens recommends configuring the environment according to Siemens’ operational guidelines for industrial security and following recommendations in the product manuals.

Additional information on industrial security by Siemens can be found on the Siemens industrial security webpage.

For more information see Siemens Security Advisory SSA-222547

See Also

https://groups.google.com/g/golang-announce/c/JvWG9FUUYT0

https://groups.google.com/forum/#!forum/golang-announce

https://groups.google.com/g/golang-announce/c/uHACNfXAZqk

http://www.nessus.org/u?01f95337

http://www.nessus.org/u?92bf1e12

http://www.nessus.org/u?4d93a24f

https://lists.debian.org/debian-lts-announce/2022/01/msg00017.html

https://lists.debian.org/debian-lts-announce/2022/01/msg00016.html

https://www.oracle.com/security-alerts/cpujan2022.html

https://cert-portal.siemens.com/productcert/pdf/ssa-222547.pdf

https://security.gentoo.org/glsa/202208-02

https://www.cisa.gov/news-events/ics-advisories/icsa-22-167-09

Plugin Details

Severity: Medium

ID: 501052

Version: 1.4

Type: remote

Family: Tenable.ot

Published: 4/11/2023

Updated: 1/30/2024

Supported Sensors: Tenable OT Security

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Medium

Base Score: 4.3

Temporal Score: 3.2

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

CVSS Score Source: CVE-2021-36221

CVSS v3

Risk Factor: Medium

Base Score: 5.9

Temporal Score: 5.2

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

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

Vulnerability Information

CPE: cpe:/o:siemens:scalance_lpe9403_firmware

Required KB Items: Tenable.ot/Siemens

Exploit Ease: No known exploits are available

Patch Publication Date: 8/8/2021

Vulnerability Publication Date: 8/8/2021

Reference Information

CVE: CVE-2021-36221