Cisco Multiple Products Use of a Broken or Risky Cryptographic Algorithm (CVE-2020-26147)

medium Tenable OT Security Plugin ID 502129

Synopsis

The remote OT asset is affected by a vulnerability.

Description

The 802.11 standard that underpins Wi-Fi Protected Access (WPA, WPA2, and WPA3) and Wired Equivalent Privacy (WEP) doesn't require that all fragments of a frame are encrypted under the same key. An adversary can abuse this to decrypt selected fragments when another device sends fragmented frames and the WEP, CCMP, or GCMP encryption key is periodically renewed.

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.

See Also

https://www.fragattacks.com

https://github.com/vanhoefm/fragattacks/blob/master/SUMMARY.md

http://www.openwall.com/lists/oss-security/2021/05/11/12

https://lists.debian.org/debian-lts-announce/2021/06/msg00019.html

https://lists.debian.org/debian-lts-announce/2021/06/msg00020.html

http://www.nessus.org/u?c9516038

http://www.nessus.org/u?be0512b5

http://www.nessus.org/u?839210e5

https://lists.debian.org/debian-lts-announce/2023/04/msg00002.html

Plugin Details

Severity: Medium

ID: 502129

Version: 1.1

Type: remote

Family: Tenable.ot

Published: 3/18/2024

Updated: 3/18/2024

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:cisco:ip_phone_8861_firmware, cpe:/o:cisco:ip_phone_8865_firmware, cpe:/o:cisco:ip_phone_8832_firmware, cpe:/o:cisco:ip_phone_6861_firmware, cpe:/o:cisco:ip_phone_8821_firmware

Required KB Items: Tenable.ot/Cisco

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

CWE: 327