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Full vulnerability report · 2022
CVE-2022-33906High confidence

DMA transactions which are targeted at input buffers used for the FwBlockServiceSmm software SMI handler could cause SMRAM corruption through a TOCTOU attack

n/a · n/a

6.4MediumCVSS 3.1
Recommended action
Scheduled

Medium technical severity with no CISA KEV confirmation; remediate through the normal risk-based patch cycle unless local exposure raises the priority.

Patch available
Direct vendor intelligence

Authoritative vendor CSAF and VEX advisories

Structured product status and remediation from the issuing vendor. Product-state explanations are always visible; large lists can be searched or downloaded.

1 current
SSA-450613 · CSAF 2.0 · revision 2 · finalSiemens ProductCERTSSA-450613: Insyde BIOS Vulnerabilities in RUGGEDCOM APE1808 Product Family
22 known affected

The vendor explicitly identifies these products as affected by this CVE.

  • RUGGEDCOM APE1808 ADM (6GK6015-0AL20-0GL0)
  • RUGGEDCOM APE1808 ADM CC (6GK6015-0AL20-0GL1)
  • RUGGEDCOM APE1808 CKP (6GK6015-0AL20-0GK0)
  • RUGGEDCOM APE1808 CKP CC (6GK6015-0AL20-0GK1)
  • RUGGEDCOM APE1808 CLOUDCONNECT (6GK6015-0AL20-0GM0)
  • RUGGEDCOM APE1808 CLOUDCONNECT CC (6GK6015-0AL20-0GM1)
  • RUGGEDCOM APE1808 ELAN (6GK6015-0AL20-0GP0)
  • RUGGEDCOM APE1808 ELAN CC (6GK6015-0AL20-0GP1)
  • RUGGEDCOM APE1808 SAM-L (6GK6015-0AL20-0GN0)
  • RUGGEDCOM APE1808 SAM-L CC (6GK6015-0AL20-0GN1)
  • RUGGEDCOM APE1808CLA-P (6GK6015-0AL20-1AA0)
  • RUGGEDCOM APE1808CLA-P CC (6GK6015-0AL20-1AA1)
Summary
DMA transactions which are targeted at input buffers used for the FwBlockServiceSmm software SMI handler could cause SMRAM corruption through a TOCTOU attack. This issue was discovered by Insyde engineering based on the general description provided by Intel's iSTARE group. https://www.insyde.com/security-pledge/SA-2022048
Remediation
Update BIOS to V1.0.212N or later version
Optional official sources

National CERT insights
?CERT means Computer Emergency Response Team; CSIRT is the closely related term Computer Security Incident Response Team.

Select the national-authority views to include. The exact source language is shown on each matched advisory. Your choice is remembered on this device and encoded in the shareable URL.

Official European source

ENISA European Vulnerability Database

Official EUVD identifiers, advisory evidence and known-exploited context. Missing fields are not treated as evidence of low risk.

1 current
ENISA EUVD identifier

EUVD-2022-36943

No EUVD known-exploited evidence

ENISA has published the identifier mapping but no EUVD description has been stored yet.

EUVD state
Present in the current official mapping
Known exploitation
Not present in the current ENISA EUVD known-exploited dataset. This is not proof of no exploitation.
ENISA score
Not supplied in the stored EUVD record
Advisory evidence
No linked advisory details stored yet
Recommended actionScheduled

Medium technical severity with no CISA KEV confirmation; remediate through the normal risk-based patch cycle unless local exposure raises the priority.

Patch available
01

What, why and how

DMA transactions which are targeted at input buffers used for the FwBlockServiceSmm software SMI handler could cause SMRAM corruption through a TOCTOU attack. DMA transactions which are targeted at input buffers used for the software SMI handler used by the FwBlockServiceSmm driver could cause SMRAM corruption through a TOCTOU attack. This issue was discovered by Insyde engineering based on the general description provided by Intel's iSTARE group. Fixed in kernel 5.2: 05.27.23, 5.3: 05.36.23, 5.4: 05.44.23, 5.5: 05.52.23 https://www.insyde.com/security-pledge/SA-2022048

What

DMA transactions which are targeted at input buffers used for the FwBlockServiceSmm software SMI handler could cause SMRAM corruption through a TOCTOU attack. DMA transactions which are targeted at input buffers used for the software SMI handler used by the FwBlockServiceSmm driver could cause SMRAM corruption through a TOCTOU attack. This issue was discovered by Insyde engineering based on the general description provided by Intel's iSTARE group. Fixed in kernel 5.2: 05.27.23, 5.3: 05.36.23, 5.4: 05.44.23, 5.5: 05.52.23 https://www.insyde.com/security-pledge/SA-2022048

Why

The product checks the state of a resource before using that resource, but the resource's state can change between the check and the use in a way that invalidates the results of the check.

How

An attacker operating through local access may attempt exploitation with elevated privileges. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

What

DMA transactions which are targeted at input buffers used for the FwBlockServiceSmm software SMI handler could cause SMRAM corruption through a TOCTOU attack. DMA transactions which are targeted at input buffers used for the software SMI handler used by the FwBlockServiceSmm driver could cause SMRAM corruption through a TOCTOU attack. This issue was discovered by Insyde engineering based on the general description provided by Intel's iSTARE group. Fixed in kernel 5.2: 05.27.23, 5.3: 05.36.23, 5.4: 05.44.23, 5.5: 05.52.23 https://www.insyde.com/security-pledge/SA-2022048

Why

The product checks the state of a resource before using that resource, but the resource's state can change between the check and the use in a way that invalidates the results of the check.

How

An attacker operating through local access may attempt exploitation with elevated privileges. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

02

Exploit reality and attack path

CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.

Observed exploitation
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
No confirmed evidence

No CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.

Public PoC / exploit material
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
None recorded

No exploit-tagged reference or CISA SSVC proof-of-concept state is currently recorded. Research may still exist outside the structured feeds.

Likely attack path
local access → Time-of-check Time-of-use (TOCTOU) Race Condition → cause the confidentiality, integrity or availability impact described by the vendor
Attack surface
Local
Privileges required
High: elevated access is required
User interaction
None
Attack complexity
High: exploitation depends on specific conditions
Security boundary
Unchanged: impact remains within the vulnerable component's security authority
Weakness
?CWE means Common Weakness Enumeration: a standard category for the underlying weakness.
CWE-367 ↗

CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition. The product checks the state of a resource before using that resource, but the resource's state can change between the check and the use in a way that invalidates the results of the check.

CVSS vector
?CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H

Common Vulnerability Scoring System 3.1: the compact vector below is decoded into plain language.

AVLocalAttack vector: The attacker needs local access to the vulnerable system.ACHighAttack complexity: Successful exploitation depends on specific conditions outside the attacker's direct control.PRHighPrivileges required: The attacker needs elevated or administrative privileges.UINoneUser interaction: No action by another user is required.SUnchangedScope: The security impact remains within the vulnerable component's authority.CHighConfidentiality impact: A successful attack can cause a major loss.IHighIntegrity impact: A successful attack can cause a major loss.AHighAvailability impact: A successful attack can cause a major loss.
Post-exploitation / living off the land
The issue can support a local privilege or sandbox boundary transition; normal system utilities may then be available in the gained context.
CWE-367
A

Official authority intelligence

Only matched European and national findings are included. Language selectors and unavailable sources are omitted.

BSI · German · WID-SEC-W-2023-0706Insyde UEFI Firmware: Mehrere Schwachstellen

Ein lokaler Angreifer kann mehrere Schwachstellen in der Insyde UEFI Firmware ausnutzen, um beliebigen Code auszuführen, Informationen offenzulegen oder einen Denial of Service zu verursachen.

Official advisory
CERT-FR · French · CERTFR-2023-AVI-0121Multiples vulnérabilités dans les produits Siemens

rd?id=CVE-2022-1473 Référence CVE CVE-2022-21198 https://www.cve.org/CVERecord?id=CVE-2022-21198 Référence CVE CVE-2022-24675 https://www.cve.org/CVERecord?id=CVE-2022-24675 Référence CVE CVE-2022-24921 https://www.cve.org/CVERecord?id=CVE-2022-24921 Référence CVE CVE-2022-27536 https://www.cve.org/CVERecord?id=CVE-2022-27536 Référence CVE CVE-2022-28327 https://www.cve.org/CVERecord?id=CVE-2022-28327 Référence CVE CVE-2022-30774 https://www.cve.org/CVERecord?id=CVE-2022-30774 Référence CVE CVE-2022-31243 https://www.cve.org/CVERecord?id=CVE-2022-31243 Référence CVE CVE-2022-31808 https://www.cve.org/CVERecord?id=CVE-2022-31808 Référence CVE CVE-2022-33906 https://www.cve.org/CVERecord?id=CVE-2022-33906 Référence CVE CVE-2022-33907 https://www.cve.org/CVERecord?id=CVE-2022-33907 Référence CVE CVE-2022-33908 https://www.cve.org/CVERecord?id=CVE-2022-33908 Référence CVE CVE-2022-33982 https://www.cve.org/CVERecord?id=CVE-2022-33982 Référence CVE CVE-2022-33984 https://www.cve.org/CVERecord?id=CVE-2022-33984 Référence CVE CVE-2022-35868 https://www.cve.org/CVERecord?id=CVE-2022-35868 Référence CVE CVE-2022-39157 https://www.cve.org/CVERecord?id=CVE-2022-39157 Référence CVE CVE-2022-43397 https://www.cve.org/CVERecord?id=CVE-2022-43397 Référence CVE CVE-2022-46345 https://www.cve.org/CVERecord?id=

Official advisory
03

Patch and workaround

Operational remediation based on structured source evidence.

Status
?Patch availability is based on structured fixed-version fields and authoritative update references. If no fix is verified, check the vendor advisory before making a change.
Patch available
Affected
RUGGEDCOM APE1808 ADM (6GK6015-0AL20-0GL0); RUGGEDCOM APE1808 ADM CC (6GK6015-0AL20-0GL1); RUGGEDCOM APE1808 CKP (6GK6015-0AL20-0GK0); RUGGEDCOM APE1808 CKP CC (6GK6015-0AL20-0GK1); RUGGEDCOM APE1808 CLOUDCONNECT (6GK6015-0AL20-0GM0); RUGGEDCOM APE1808 CLOUDCONNECT CC (6GK6015-0AL20-0GM1); RUGGEDCOM APE1808 ELAN (6GK6015-0AL20-0GP0); RUGGEDCOM APE1808 ELAN CC (6GK6015-0AL20-0GP1); RUGGEDCOM APE1808 SAM-L (6GK6015-0AL20-0GN0); RUGGEDCOM APE1808 SAM-L CC (6GK6015-0AL20-0GN1); RUGGEDCOM APE1808CLA-P (6GK6015-0AL20-1AA0); RUGGEDCOM APE1808CLA-P CC (6GK6015-0AL20-1AA1); RUGGEDCOM APE1808CLA-S1 (6GK6015-0AL20-1AB0); RUGGEDCOM APE1808CLA-S1 CC (6GK6015-0AL20-1AB1); RUGGEDCOM APE1808CLA-S3 (6GK6015-0AL20-1AD0); RUGGEDCOM APE1808CLA-S3 CC (6GK6015-0AL20-1AD1); RUGGEDCOM APE1808CLA-S5 (6GK6015-0AL20-1AF0); RUGGEDCOM APE1808CLA-S5 CC (6GK6015-0AL20-1AF1); RUGGEDCOM APE1808LNX (6GK6015-0AL20-0GH0); RUGGEDCOM APE1808LNX CC (6GK6015-0AL20-0GH1); RUGGEDCOM APE1808W10 (6GK6015-0AL20-0GJ0); RUGGEDCOM APE1808W10 CC (6GK6015-0AL20-0GJ1)
Fixed
No fixed version is explicitly recorded in the structured CVE data.
Action
Update BIOS to V1.0.212N or later version
Workaround
No verified workaround is recorded. Limit untrusted access and use least privilege until authoritative guidance is available.
04

Evidence and provenance

Published 14 Nov 2022 · Last source change 30 Apr 2025, 18:56 UTC · CWE-367 · Time-of-check Time-of-use (TOCTOU) Race Condition

CVE recordCVE.org · 5.1
CVSS sourceNIST NVD
EPSS source
?The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.
FIRST · tracked since 2026-08-14
European sourceENISA EUVD · EUVD-2022-36943
Product sourceVendor CSAF · Siemens ProductCERT
Remediation sourceVendor CSAF · Siemens ProductCERT
CWE sourceCISA ADP
NVD statusNVD modified after enrichment

Core structured fields are present and their contributing authorities are shown above.

Material change intelligence

What changed after publication

View recent updates →

No material field changes have been recorded since change tracking began. Routine source refreshes and cosmetic edits are intentionally excluded.

Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
CVE published
ENISA EUVD · EUVD-2022-36943↗Vendor CSAF · Siemens ProductCERT↗CVE authority or vendor reference↗Vendor advisory↗Official CVE record (CNA and ADP data)↗NVD record↗
Technical terms and abbreviations used in this report
CVE
Common Vulnerabilities and Exposures: the public identifier for one disclosed vulnerability.
CVSS
Common Vulnerability Scoring System: a technical severity framework; it is not patching priority by itself.
EPSS
Exploit Prediction Scoring System: FIRST's estimate of the probability that exploitation activity will be observed in the next 30 days; it is a forecast, not confirmation.
CWE
Common Weakness Enumeration: the standard category describing the underlying software or hardware weakness.
CNA
CVE Numbering Authority: an organisation authorised to assign and publish CVE records.
CISA ADP
Cybersecurity and Infrastructure Security Agency Authorized Data Publisher: structured enrichment added to a CVE record.
NVD
National Vulnerability Database: NIST's enrichment service for CVE records.
CERT / CSIRT
A computer security incident response team that publishes warnings or coordinates incident response.
PoC
Proof of concept: public material that demonstrates or helps reproduce exploitation.
CSAF
Common Security Advisory Framework: a machine-readable format for security advisories.
LoTL
Living off the land: abuse of legitimate tools or system functions during an attack.
Free version - for non-commercial use only.CVE-2022-33906 · cve.blacktree.nl