CVE-2021-31893

CVSS V2 High 7.2 CVSS V3 High 7.8
Description
A vulnerability has been identified in SIMATIC PCS 7 V8.2 and earlier (All versions), SIMATIC PCS 7 V9.0 (All versions < V9.0 SP3), SIMATIC PDM (All versions < V9.2), SIMATIC STEP 7 V5.X (All versions < V5.6 SP2 HF3), SINAMICS STARTER (containing STEP 7 OEM version) (All versions < V5.4 HF2). The affected software contains a buffer overflow vulnerability while handling certain files that could allow a local attacker to trigger a denial-of-service condition or potentially lead to remote code execution.
Overview
  • CVE ID
  • CVE-2021-31893
  • Assigner
  • productcert@siemens.com
  • Vulnerability Status
  • Analyzed
  • Published Version
  • 2021-07-13T11:15:09
  • Last Modified Date
  • 2021-08-06T14:03:32
Weakness Enumerations
CWE URL
CWE-120 http://cwe.mitre.org/data/definitions/120.html
CPE Configuration (Product)
CPE Vulnerable Operator Version Start Version End
AND
cpe:2.3:o:siemens:simatic_pcs_firmware:*:*:*:*:*:*:*:* 1 OR 8.2
cpe:2.3:o:siemens:simatic_pcs_firmware:9.0:-:*:*:*:*:*:* 1 OR
cpe:2.3:o:siemens:simatic_pcs_firmware:9.0:sp1:*:*:*:*:*:* 1 OR
cpe:2.3:o:siemens:simatic_pcs_firmware:9.0:sp2:*:*:*:*:*:* 1 OR
cpe:2.3:h:siemens:simatic_pcs:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:siemens:simatic_pdm_firmware:*:*:*:*:*:*:*:* 1 OR 9.2
cpe:2.3:h:siemens:simatic_pdm:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:siemens:simatic_step_7_firmware:*:*:*:*:*:*:*:* 1 OR 5.6
cpe:2.3:h:siemens:simatic_step_7:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:siemens:sinamics_starter_firmware:*:*:*:*:*:*:*:* 1 OR 5.4
cpe:2.3:o:siemens:sinamics_starter_firmware:5.4:-:*:*:*:*:*:* 1 OR
cpe:2.3:o:siemens:sinamics_starter_firmware:5.4:hotfix_1:*:*:*:*:*:* 1 OR
cpe:2.3:o:siemens:sinamics_starter_firmware:5.4:hotfix_2:*:*:*:*:*:* 1 OR
cpe:2.3:h:siemens:sinamics_starter:-:*:*:*:*:*:*:* 0 OR
CVSS Version 2
  • Version
  • 2.0
  • Vector String
  • AV:L/AC:L/Au:N/C:C/I:C/A:C
  • Access Vector
  • LOCAL
  • Access Compatibility
  • LOW
  • Authentication
  • NONE
  • Confidentiality Impact
  • COMPLETE
  • Integrity Impact
  • COMPLETE
  • Availability Impact
  • COMPLETE
  • Base Score
  • 7.2
  • Severity
  • HIGH
  • Exploitability Score
  • 3.9
  • Impact Score
  • 10
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://cert-portal.siemens.com/productcert/pdf/ssa-641963.pdf Patch Vendor Advisory
Sources
Source Name Source URL
NIST https://nvd.nist.gov/vuln/detail/CVE-2021-31893
MITRE https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-31893
History
Created Old Value New Value Data Type Notes
2022-05-10 06:58:10 Added to TrackCVE
2022-12-05 05:54:44 2021-07-13T11:15Z 2021-07-13T11:15:09 CVE Published Date updated
2022-12-05 05:54:44 2021-08-06T14:03:32 CVE Modified Date updated
2022-12-05 05:54:44 Analyzed Vulnerability Status updated