Siemens SIMATIC S7-1500 TM MFP BIOS Loop with Unreachable Exit Condition ('Infinite Loop') (CVE-2020-27618)

medium Tenable OT Security Plugin ID 502974

Synopsis

The remote OT asset is affected by a vulnerability.

Description

The iconv function in the GNU C Library (aka glibc or libc6) 2.32 and earlier, when processing invalid multi-byte input sequences in IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 encodings, fails to advance the input state, which could lead to an infinite loop in applications, resulting in a denial of service, a different vulnerability from CVE-2016-10228.

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Solution

Refer to the vendor advisory.

Plugin Details

Severity: Medium

ID: 502974

Version: 1.1

Type: remote

Family: Tenable.ot

Published: 2/25/2025

Updated: 2/25/2025

Supported Sensors: Tenable OT Security

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v3

Risk Factor: Medium

Base Score: 5.5

Temporal Score: 5

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

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

Vulnerability Information

CPE: cpe:/o:siemens:simatic_s7-1500_tm_mfp, cpe:/o:siemens:siplus_s7-1500_cpu_firmware:3.1.0, cpe:/o:siemens:simatic_s7-1500_cpu_firmware:3.1.0

Required KB Items: Tenable.ot/Siemens

Exploit Ease: No known exploits are available

Patch Publication Date: 6/13/2023

Vulnerability Publication Date: 6/13/2023

Reference Information

CVE: CVE-2020-27618

CWE: 835

ICSA: 23-166-10

Detections

Analytics