Siemens SIMATIC Devices Stack-based Buffer Overflow (CVE-2023-4911)

high Tenable OT Security Plugin ID 503813

Synopsis

The remote OT asset is affected by a vulnerability.

Description

A buffer overflow was discovered in the GNU C Library's dynamic loader ld.so while processing the GLIBC_TUNABLES environment variable. This issue could allow a local attacker to use maliciously crafted GLIBC_TUNABLES environment variables when launching binaries with SUID permission to execute code with elevated privileges.

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

Solution

Refer to the vendor advisory.

Plugin Details

Severity: High

ID: 503813

Version: 1.2

Type: remote

Family: Tenable.ot

Published: 10/29/2025

Updated: 10/30/2025

Supported Sensors: Tenable OT Security

Risk Information

VPR

Risk Factor: Critical

Score: 9.7

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5.9

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

CVSS Score Source: CVE-2023-4911

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 7.5

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

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

Vulnerability Information

CPE: cpe:/o:siemens:simatic_s7-1500_cpu_firmware:3.1.5, cpe:/o:siemens:simatic_s7-1500_tm_mfp_firmware, cpe:/o:siemens:siplus_s7-1500_cpu_firmware:3.1.5

Required KB Items: Tenable.ot/Siemens

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 6/13/2023

Vulnerability Publication Date: 6/13/2023

CISA Known Exploited Vulnerability Due Dates: 12/12/2023

Exploitable With

Core Impact

Metasploit (Glibc Tunables Privilege Escalation CVE-2023-4911 (aka Looney Tunables))

Reference Information

CVE: CVE-2023-4911

CWE: 121

Detections

Analytics