CVE-2021-33626

CVSS V2 Medium 4.6 CVSS V3 High 7.8
Description
A vulnerability exists in SMM (System Management Mode) branch that registers a SWSMI handler that does not sufficiently check or validate the allocated buffer pointer(QWORD values for CommBuffer). This can be used by an attacker to corrupt data in SMRAM memory and even lead to arbitrary code execution.
Overview
  • CVE ID
  • CVE-2021-33626
  • Assigner
  • cve@mitre.org
  • Vulnerability Status
  • Analyzed
  • Published Version
  • 2021-10-01T03:15:06
  • Last Modified Date
  • 2022-04-24T02:03:42
Weakness Enumerations
CWE URL
CWE-829 http://cwe.mitre.org/data/definitions/829.html
CPE Configuration (Product)
CPE Vulnerable Operator Version Start Version End
AND
cpe:2.3:o:insyde:insydeh2o:*:*:*:*:*:*:*:* 1 OR 5.3 5.34.44
AND
cpe:2.3:o:insyde:insydeh2o:*:*:*:*:*:*:*:* 1 OR 5.2 5.25.44
AND
cpe:2.3:o:insyde:insydeh2o:*:*:*:*:*:*:*:* 1 OR 5.1 5.16.25
AND
cpe:2.3:o:insyde:insydeh2o:*:*:*:*:*:*:*:* 1 OR 5.4 5.42.44
AND
cpe:2.3:o:insyde:insydeh2o:*:*:*:*:*:*:*:* 1 OR 5.3 5.35.25
AND
cpe:2.3:o:insyde:insydeh2o:*:*:*:*:*:*:*:* 1 OR 5.2 5.26.25
AND
cpe:2.3:o:insyde:insydeh2o:*:*:*:*:*:*:*:* 1 OR 5.4 5.43.25
AND
cpe:2.3:o:siemens:ruggedcom_apr1808_firmware:-:*:*:*:*:*:*:* 1 OR
cpe:2.3:h:siemens:ruggedcom_apr1808:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:siemens:simatic_field_pg_m5_firmware:-:*:*:*:*:*:*:* 1 OR
cpe:2.3:h:siemens:simatic_field_pg_m5:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:siemens:simatic_field_pg_m6_firmware:-:*:*:*:*:*:*:* 1 OR
cpe:2.3:h:siemens:simatic_field_pg_m6:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:siemens:simatic_ipc127e_firmware:-:*:*:*:*:*:*:* 1 OR
cpe:2.3:h:siemens:simatic_ipc127e:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:siemens:simatic_ipc227g_firmware:-:*:*:*:*:*:*:* 1 OR
cpe:2.3:h:siemens:simatic_ipc227g:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:siemens:simatic_ipc277g_firmware:-:*:*:*:*:*:*:* 1 OR
cpe:2.3:h:siemens:simatic_ipc277g:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:siemens:simatic_ipc327g_firmware:-:*:*:*:*:*:*:* 1 OR
cpe:2.3:h:siemens:simatic_ipc327g:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:siemens:simatic_ipc377g_firmware:-:*:*:*:*:*:*:* 1 OR
cpe:2.3:h:siemens:simatic_ipc377g:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:siemens:simatic_ipc427e_firmware:-:*:*:*:*:*:*:* 1 OR
cpe:2.3:h:siemens:simatic_ipc427e:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:siemens:simatic_ipc477e_firmware:-:*:*:*:*:*:*:* 1 OR
cpe:2.3:h:siemens:simatic_ipc477e:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:siemens:simatic_ipc477e_pro_firmware:-:*:*:*:*:*:*:* 1 OR
cpe:2.3:h:siemens:simatic_ipc477e_pro:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:siemens:simatic_ipc627e_firmware:-:*:*:*:*:*:*:* 1 OR
cpe:2.3:h:siemens:simatic_ipc627e:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:siemens:simatic_ipc647e_firmware:-:*:*:*:*:*:*:* 1 OR
cpe:2.3:h:siemens:simatic_ipc647e:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:siemens:simatic_ipc677e_firmware:-:*:*:*:*:*:*:* 1 OR
cpe:2.3:h:siemens:simatic_ipc677e:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:siemens:simatic_ipc847e_firmware:-:*:*:*:*:*:*:* 1 OR
cpe:2.3:h:siemens:simatic_ipc847e:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:siemens:simatic_itp1000_firmware:-:*:*:*:*:*:*:* 1 OR
cpe:2.3:h:siemens:simatic_itp1000:-:*:*:*:*:*:*:* 0 OR
CVSS Version 2
  • Version
  • 2.0
  • Vector String
  • AV:L/AC:L/Au:N/C:P/I:P/A:P
  • Access Vector
  • LOCAL
  • Access Compatibility
  • LOW
  • Authentication
  • NONE
  • Confidentiality Impact
  • PARTIAL
  • Integrity Impact
  • PARTIAL
  • Availability Impact
  • PARTIAL
  • Base Score
  • 4.6
  • Severity
  • MEDIUM
  • Exploitability Score
  • 3.9
  • Impact Score
  • 6.4
CVSS Version 3
  • Version
  • 3.1
  • Vector String
  • CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
  • Attack Vector
  • LOCAL
  • Attack Compatibility
  • LOW
  • Privileges Required
  • LOW
  • User Interaction
  • NONE
  • Scope
  • UNCHANGED
  • Confidentiality Impact
  • HIGH
  • Availability Impact
  • HIGH
  • Base Score
  • 7.8
  • Base Severity
  • HIGH
  • Exploitability Score
  • 1.8
  • Impact Score
  • 5.9
References
Reference URL Reference Tags
https://www.insyde.com/security-pledge/SA-2021001 Vendor Advisory
https://www.insyde.com/security-pledge Vendor Advisory
https://security.netapp.com/advisory/ntap-20220216-0006/ Third Party Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-306654.pdf Third Party Advisory
Sources
Source Name Source URL
NIST https://nvd.nist.gov/vuln/detail/CVE-2021-33626
MITRE https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-33626
History
Created Old Value New Value Data Type Notes
2022-05-10 06:27:01 Added to TrackCVE
2022-12-05 11:36:29 2021-10-01T03:15Z 2021-10-01T03:15:06 CVE Published Date updated
2022-12-05 11:36:29 2022-04-24T02:03:42 CVE Modified Date updated
2022-12-05 11:36:29 Analyzed Vulnerability Status updated