CriticalCVE-2022-22806

Schneider Electric SmartConnect: Authentication Bypass by Capture-replay (CVE-2022-22806)

Published 09.03.2022Sources: Schneider Electric, CVE.org

What is affected, what to do

A CWE-294: Authentication Bypass by Capture-replay vulnerability exists that could cause an unauthenticated connection to the UPS when a malformed connection is sent. Affected Product: SmartConnect Family: SMT Series (SMT Series ID=1015: UPS 04.5 and prior), SMC Series (SMC Series ID=1018: UPS 04.2 and prior), SMTL Series (SMTL Series ID=1026: UPS 02.9 and prior), SCL Series (SCL Series ID=1029: UPS 02.5 and prior / SCL Series ID=1030: UPS 02.5 and prior / SCL Series ID=1036: UPS 02.5 and prior / SCL Series ID=1037: UPS 03.1 and prior), SMX Series (SMX Series ID=1031: UPS 03.1 and prior)

The available sources name no fixed version. Check the vendor guidance in the references below.

Affected: Schneider Electric SmartConnect eq SMT Series..SMT Series
Schneider Electric SmartConnect eq SMC Series..SMC Series
Schneider Electric SmartConnect eq SMTL Series..SMTL Series
Schneider Electric SmartConnect eq SCL Series..SCL Series
Schneider Electric SmartConnect eq SMX Series..SMX Series

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Metrics

9.8

Priority

XIEM Effective CVSS: highest available CVSS rating from NVD and vendor data.

Source: NVD, CVSS v3

9.8

CVSS v3

Severity Critical on the scale from 0 to 10.

Source: Schneider Electric, CVE.org

12.5 %

EPSS score

Elevated — model estimates 10-50% exploitation likelihood.

Source: FIRST EPSS, percentile 96.2

Show all metrics

Severity: Critical
Priority (0–325) The priority score is a consolidated metric that condenses several individual signals into a single, action-guiding ranking: technical severity (CVSS), exploitation likelihood (EPSS), known-exploited status (KEV) and the context of the affected asset. The aim is to answer the only truly important question in vulnerability management: what first? Read in glossary: 123.62 Methodology
Exploit maturity An exploit is code or a technique that specifically uses a concrete vulnerability to force unintended behaviour — such as executing code or escalating privileges. It is the tool that turns a theoretical flaw into a practical attack. Read in glossary: no public PoC known
XIEM Effective CVSS XIEM® is the tiered managed-security operating model from NEOSEC and a registered trademark of NEOSEC GmbH. It extends classic SIEM — the central collection, normalisation and correlation of security-relevant events — with endpoint forensics, network visibility and deception technology, and consolidates them into three building tiers: Sentry, Orchestrate and Command. Read in glossary: 9.8 Methodology
CVSS v3 CVSS is the globally established, open standard for assessing the technical severity of a vulnerability on a scale from 0 to 10. It describes how easily a flaw can be exploited and what damage it can cause — but not how likely its actual exploitation is. CVSS and the complementary EPSS deliberately answer different questions. Read in glossary: 9.8
EPSS score The EPSS score is the absolute model output for an individual vulnerability: the estimated probability of real-world exploitation within the next 30 days, expressed as a value between 0 and 1 (i.e. 0 % to 100 %). A score of 0.42 means „the model estimates a 42 % chance of real-world exploitation within 30 days“. Read in glossary: 12.5 %; Elevated — model estimates 10-50% exploitation likelihood.
EPSS percentile The EPSS percentile is the relative position of a vulnerability within all EPSS-scored CVEs, expressed as a value between 0 and 1. A percentile of 0.90 means „this CVE has a higher EPSS score than 90 % of all other scored CVEs“. Unlike the EPSS score, it is not a probability — but a positioning within a ranking. Read in glossary: 96.2; Critical — this CVE ranks in the top fifth of all CVEs scored today (rank ≥ 80%).
KEV status The KEV catalogue is a list maintained by the US authority CISA of vulnerabilities for which active exploitation in the wild has been confirmed. It answers not the question „how severe?“ but „is it already being attacked?“ — thereby sharply prioritising patching. Read in glossary: —
Published: 09.03.2022
CWE CWE is a catalogue of typical weakness types in software and hardware — such as flawed input validation, unsafe memory handling or poor authentication. Where a CVE names a concrete vulnerability in a concrete product, a CWE describes the underlying class of defect. Read in glossary: CWE-294

Detection rules

No NEOSEC detection rule is available for this vulnerability yet.

Classification under NIS2 and CRA

Rule-based classification from exploitation status and severity. It does not replace a case-by-case assessment.

NIS2 NIS2 is EU Directive (EU) 2022/2555 to raise the level of cybersecurity across the Union. It substantially broadens obligations compared with the first NIS directive: more sectors, mandatory risk management, staged reporting duties and personal accountability of senior management. Read in glossary: High technical severity: assess and remediate the vulnerability in vulnerability handling under Art. 21(2)(e) NIS2 and document the decision.
CRA The CRA is EU Regulation (EU) 2024/2847 setting horizontal cybersecurity requirements for „products with digital elements“ — from industrial controllers and software to connected consumer devices. For the first time manufacturers must ensure security across the entire product lifecycle, handle vulnerabilities and provide security updates. Read in glossary: From 11.12.2027, Annex I Part II CRA requires manufacturers of affected products with digital elements to handle vulnerabilities without delay and provide security updates.
ISO/IEC 27001 ISO/IEC 27001 is the internationally leading standard for an information security management system (ISMS). It describes a risk-based, process-oriented framework to systematically plan, implement, review and improve information security. Read in glossary: Control A.8.8, management of technical vulnerabilities: assess relevance to your systems, plan remediation and keep evidence.

Description

Source: schneider_csaf, cvelistv5, NVD (NIST)

Affected products

The following versions are affected. Older releases of the same product line are also vulnerable unless stated otherwise.

Affected products
Vendor	Product	Affected versions	Fixed in
Schneider Electric	SmartConnect	`SMC Series` `SCL Series` `SMTL Series` `SMX Series` `SMT Series`	— — — — —
Schneider Electric	ID=1015	`UPS 04.6`	—
Schneider Electric	ID=1018	`UPS 04.3`	—
Schneider Electric	ID=1026	`UPS 15.0`	—
Schneider Electric	ID=1030	`UPS 15.0`	—
Schneider Electric	ID=1031	`UPS 15.0` `UPS 04.6`	— —

Vendors and products

Affected operating systems

Affected operating systems
Family	Vendor	Product	Version
Other	schneider-electric	scl_series_1029_ups_firmware	—
Other	schneider-electric	scl_series_1030_ups_firmware	—
Other	schneider-electric	scl_series_1036_ups_firmware	—
Other	schneider-electric	scl_series_1037_ups_firmware	—
Other	schneider-electric	smc_series_1018_ups_firmware	—
Other	schneider-electric	smt_series_1015_ups_firmware	—
Other	schneider-electric	smtl_series_1026_ups_firmware	—
Other	schneider-electric	smx_series_1031_ups_firmware	—

Weakness classes (CWE)

CWE-294Authentication Bypass by Capture-replay
Base
A capture-replay flaw exists when the design of the product makes it possible for a malicious user to sniff network traffic and bypass authentication by replaying it to the server in question to the same effect as the original message (or with minor changes).
Entry at MITRE CWE-294

References & sources

se.comww/en/download/document/SEVD-2022-067-02x_refsource_MISC, Vendor advisory

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