Siemens SCALANCE FragAttacks (CVE-2020-26147)

medium Tenable OT Security Plugin ID 500985

Synopsis

The remote OT asset is affected by a vulnerability.

Description

An issue was discovered in the Linux kernel 5.8.9. The WEP, WPA, WPA2, and WPA3 implementations reassemble fragments even though some of them were sent in plaintext. This vulnerability can be abused to inject packets and/or exfiltrate selected fragments when another device sends fragmented frames and the WEP, CCMP, or GCMP data-confidentiality protocol is used.

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: Medium

ID: 500985

Version: 1.3

Type: remote

Family: Tenable.ot

Published: 4/11/2023

Updated: 10/19/2023

Supported Sensors: Tenable OT Security

Risk Information

VPR

Risk Factor: Medium

Score: 4.2

CVSS v2

Risk Factor: Low

Base Score: 3.2

Temporal Score: 2.4

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

CVSS Score Source: CVE-2020-26147

CVSS v3

Risk Factor: Medium

Base Score: 5.4

Temporal Score: 4.7

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

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

Vulnerability Information

CPE: cpe:/o:siemens:scalance_w1748-1_firmware:-::~~~~m12~, cpe:/o:siemens:scalance_w1750d_firmware:-, cpe:/o:siemens:scalance_w1788-1_firmware:-::~~~~m12~, cpe:/o:siemens:scalance_w1788-2_firmware:-::~~~~eec_m12~, cpe:/o:siemens:scalance_w1788-2_firmware:-::~~~~m12~, cpe:/o:siemens:scalance_w1788-2ia_firmware:-::~~~~m12~, cpe:/o:siemens:scalance_w721-1_firmware:-::~~~~rj45~, cpe:/o:siemens:scalance_w722-1_firmware:-::~~~~rj45~, cpe:/o:siemens:scalance_w734-1_firmware:-::~~~~rj45~, cpe:/o:siemens:scalance_w738-1_firmware:-::~~~~m12~, cpe:/o:siemens:scalance_w748-1_firmware:-::~~~~m12~, cpe:/o:siemens:scalance_w748-1_firmware:-::~~~~rj45~, cpe:/o:siemens:scalance_w761-1_firmware:-::~~~~rj45~, cpe:/o:siemens:scalance_w774-1_firmware:-::~~~~m12_eec~, cpe:/o:siemens:scalance_w774-1_firmware:-::~~~~rj45~, cpe:/o:siemens:scalance_w778-1_firmware:-::~~~~m12_eec~, cpe:/o:siemens:scalance_w778-1_firmware:-::~~~~m12~, cpe:/o:siemens:scalance_w786-1_firmware:-::~~~~rj45~, cpe:/o:siemens:scalance_w786-2_firmware:-::~~~~rj45~, cpe:/o:siemens:scalance_w786-2_firmware:-::~~~~sfp~, cpe:/o:siemens:scalance_w786-2ia_firmware:-::~~~~rj45~, cpe:/o:siemens:scalance_w788-1_firmware:-::~~~~m12~, cpe:/o:siemens:scalance_w788-1_firmware:-::~~~~rj45~, cpe:/o:siemens:scalance_w788-2_firmware:-::~~~~m12_eec~, cpe:/o:siemens:scalance_w788-2_firmware:-::~~~~m12~, cpe:/o:siemens:scalance_w788-2_firmware:-::~~~~rj45~

Required KB Items: Tenable.ot/Siemens

Exploit Ease: No known exploits are available

Patch Publication Date: 5/11/2021

Vulnerability Publication Date: 5/11/2021

Reference Information

CVE: CVE-2020-26147

Detections

Analytics