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CVE-2021-33627

Vulnerability in N/a

CVSS score

8.2

EPSS probability

%0.3

Risk score

0.0

Published

4 y ago

OverviewPublic Exploits (0)NewsroomVulnerability Timeline
Patch status has not yet been verified

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Impact on My Inventory

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Vulnerability description

DayBreach CVE AI Research

CVE-2021-33627 has vendor, distribution, patch and security-source records on file. We can compare them and prepare an explanation linked to the evidence.

An issue was discovered in Insyde InsydeH2O Kernel 5.0 before 05.09.11, 5.1 before 05.17.11, 5.2 before 05.27.11, 5.3 before 05.36.11, 5.4 before 05.44.11, and 5.5 before 05.52.11 affecting FwBlockServiceSmm. Software SMI services that use the Communicate() function of the EFI_SMM_COMMUNICATION_PROTOCOL do not check whether the address of the buffer is valid, which allows use of SMRAM, MMIO, or OS kernel addresses.

IMPACT: Affected Products and Software

Affected Products

The following products are affected by CVE-2021-33627 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.

IDVENDORPRODUCTACTION
1n/an/a View
2insydeinsydeh2o View
3insydeinsydeh2o View
4insydeinsydeh2o View
5insydeinsydeh2o View
6siemenssimatic field pg m5 firmware View
7siemenssimatic field pg m5 View
8siemenssimatic field pg m6 firmware View
9siemenssimatic field pg m6 View
10siemenssimatic ipc127e firmware View
11siemenssimatic ipc127e View
12siemenssimatic ipc227g firmware View
13siemenssimatic ipc227g View
14siemenssimatic ipc277g firmware View
15siemenssimatic ipc277g View
16siemenssimatic ipc327g firmware View
17siemenssimatic ipc327g View
18siemenssimatic ipc377g firmware View
19siemenssimatic ipc377g View
20siemenssimatic ipc427e firmware View
21siemenssimatic ipc427e View
22siemenssimatic ipc477e firmware View
23siemenssimatic ipc477e View
24siemenssimatic ipc627e firmware View
25siemenssimatic ipc627e View
26siemenssimatic ipc647e firmware View
27siemenssimatic ipc647e View
28siemenssimatic ipc677e firmware View
29siemenssimatic ipc677e View
30siemenssimatic ipc847e firmware View
31siemenssimatic ipc847e View
32siemenssimatic itp1000 firmware View
33siemenssimatic itp1000 View
Total affected vendors: 3|Products: 33

RED HAT CSAF/VEX: Product Impact Check

Red Hat has not yet published a CSAF/VEX impact record for this CVE. This does not mean “not affected”.

SCORING: CVSS from Multiple Sources

CVSS Scores

The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.

SCOREVERSIONSEVERITYVECTORSOURCE
8.2CVSS V31HIGHCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:HNVD
7.2CVSS V2—AV:L/AC:L/Au:N/C:C/I:C/A:CNVD

Patch and Remediation Guide

Solution & Remediation Advisory

Patch status unknown

İncelenen resmî kaynaklarda yama durumu doğrulanamadı. Bu sonuç “yama yok” anlamına gelmez.

Confirm the affected product and version against the source evidence above.
Restrict access to internet-facing services and apply network segmentation.
Until a patch is confirmed, follow the vendor advisory; do not read an unknown status as “no patch”.
Monitor server logs and network endpoints for signs of anomalous execution.

Public exploit and active exploitation status

Verified exploit intelligence

No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.

Weakness Classification and Attack Patterns (CWE & CAPEC)

CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2021-33627 is associated with the following CWEs:

CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2021-33627 weaknesses.

CAPEC-66: SQL InjectionCAPEC-126: Path TraversalCAPEC-28: OS Command Injection

Attack Vector and Accessibility

ExposureYerel erişim
PermissionsHigh
UserGerekmiyor

Official Sources and Advisories

https://www.insyde.com/security-pledgevendor-advisoryhttps://www.insyde.com/security-pledge/SA-2022022vendor-advisoryhttps://cert-portal.siemens.com/productcert/pdf/ssa-306654.pdfvendor-advisoryhttps://security.netapp.com/advisory/ntap-20220222-0002/vendor-advisoryhttps://www.kb.cert.org/vuls/id/796611nvdhttps://cert-portal.siemens.com/productcert/html/ssa-306654.htmlnvd

CVSS Vector Radar Chart

8.2 / 10
Attack VectorLocalComplexityLowPrivilegesHighUser Interact.NoneConfidentialityLowIntegrityNoneAvailabilityHigh

Vulnerability Scoring Details

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
Attack VectorLocal
Attack ComplexityLow
Privileges RequiredHigh privileges
User InteractionNone required
Confidentiality (Gizlilik)Low
Integrity (Bütünlük)None
Availability (Erişilebilirlik)High

Yama durumu bilinmiyor

İncelenen resmî kaynaklarda yama durumu doğrulanamadı. Bu sonuç “yama yok” anlamına gelmez.

Follow the vendor

N
n/a logo
n/a
I
insyde logo
insyde
S
siemens logo
siemens

Weakness Type (CWE & CAPEC)

CWE-119

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