Siemens SIMATIC S7-1500 Use After Free (CVE-2023-6817)

high Tenable OT Security Plugin ID 502221

Synopsis

The remote OT asset is affected by a vulnerability.

Description

A use-after-free vulnerability in the Linux kernel's netfilter: nf_tables component can be exploited to achieve local privilege escalation.

The function nft_pipapo_walk did not skip inactive elements during set walk which could lead double deactivations of PIPAPO (Pile Packet Policies) elements, leading to use-after-free.

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

Solution

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

- Only build and run applications from trusted sources

Product-specific remediations or mitigations can be found in the section 'Affected Products and Solution' of the vendor advisory.

For more information, see the associated Siemens security advisory in HTML and CSAF.

Plugin Details

Severity: High

ID: 502221

Version: 1.1

Type: remote

Family: Tenable.ot

Published: 4/22/2024

Updated: 4/22/2024

Supported Sensors: Tenable OT Security

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5

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

CVSS Score Source: CVE-2023-6817

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.8

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:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:siemens:simatic_s7-1500_tm_mfp, cpe:/o:siemens:simatic_s7-1500_cpu_1518-4_pn%2fdp_mfp_firmware, cpe:/o:siemens:simatic_s7-1500_cpu_1518f-4_pn%2fdp_mfp_firmware

Required KB Items: Tenable.ot/Siemens

Exploit Ease: No known exploits are available

Patch Publication Date: 4/9/2024

Vulnerability Publication Date: 4/9/2024

Reference Information

CVE: CVE-2023-6817

Detections

Analytics