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Emerson DeltaV Distributed Control System Use of a Broken or Risky Cryptographic Algorithm (CVE-2022-29965)

medium Tenable OT Security Plugin ID 500698

Synopsis

The remote OT asset is affected by a vulnerability.

Description

The Emerson DeltaV Distributed Control System (DCS) controllers and IO cards through 2022-04-29 misuse passwords. Access to privileged operations on the maintenance port TELNET interface (23/TCP) on M-series and SIS (CSLS/LSNB/LSNG) nodes is controlled by means of utility passwords. These passwords are generated using a deterministic, insecure algorithm using a single seed value composed of a day/hour/minute timestamp with less than 16 bits of entropy. The seed value is fed through a lookup table and a series of permutation operations resulting in three different four-character passwords corresponding to different privilege levels. An attacker can easily reconstruct these passwords and thus gain access to privileged maintenance operations. NOTE: this is different from CVE-2014-2350.

 - The Emerson DeltaV Distributed Control System (DCS) controllers and IO cards through 2022-04-29 misuse passwords. Access to privileged operations on the maintenance port TELNET interface (23/TCP) on M-series and SIS (CSLS/LSNB/LSNG) nodes is controlled by means of utility passwords. These passwords are generated using a deterministic, insecure algorithm using a single seed value composed of a day/hour/minute timestamp with less than 16 bits of entropy. The seed value is fed through a lookup table and a series of permutation operations resulting in three different four-character passwords corresponding to different privilege levels. An attacker can easily reconstruct these passwords and thus gain access to privileged maintenance operations. NOTE: this is different from CVE-2014-2350. (CVE-2022-29965)

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

Solution

The following text was originally created by the Cybersecurity and Infrastructure Security Agency (CISA). The original can be found at CISA.gov.

Emerson has provided the following mitigations or workarounds:

Emerson has corrected CVE-2022-29965 in all currently supported versions of DeltaV. For additional mitigations and preventative measures, please see the Emerson Guardian Support Portal (login required).

Emerson has mitigated CVE-2022-29962, CVE-2022-29963, and CVE-2022-29964 in all currently supported versions of DeltaV.
Please see the Emerson Guardian Support Portal (login required) for more information.

Emerson corrected the Firmware image verification vulnerability in Version 14.3 and mitigated it in all other versions.
Please see the Emerson Guardian Support Portal (login required) for more information.

See Also

https://www.forescout.com/blog/

https://www.cisa.gov/uscert/ics/advisories/icsa-22-181-03

Plugin Details

Severity: Medium

ID: 500698

Version: 1.7

Type: remote

Family: Tenable.ot

Published: 8/4/2022

Updated: 3/4/2024

Supported Sensors: Tenable OT Security

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: Medium

Base Score: 4.6

Temporal Score: 3.4

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

CVSS Score Source: CVE-2022-29965

CVSS v3

Risk Factor: Medium

Base Score: 5.5

Temporal Score: 4.8

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

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

Vulnerability Information

CPE: cpe:/o:emerson:deltav_distributed_control_system_sq_controller_firmware

Required KB Items: Tenable.ot/Emerson

Exploit Ease: No known exploits are available

Patch Publication Date: 7/26/2022

Vulnerability Publication Date: 7/26/2022

Reference Information

CVE: CVE-2022-29965

CWE: 327