CVE-2021-31893

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.

CVSS v3.0 7.8 HIGH
CVSS v2.0 7.2 HIGH

7.8^/10

CVSS v3.0 : HIGH

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

7.2^/10

CVSS v2.0 : HIGH

V2 Legend

Vector : AV:L/AC:L/Au:N/C:C/I:C/A:C

Exploitability : 3.9 / Impact : 10.0

Access Vector LOCAL

Access Complexity LOW

Authentication NONE

Confidentiality Impact COMPLETE

Integrity Impact COMPLETE

Availability Impact COMPLETE

References

Link	Resource
https://cert-portal.siemens.com/productcert/pdf/ssa-641963.pdf	Patch Vendor Advisory

Configurations

Configuration 1 (hide)

AND

OR	cpe:2.3:o:siemens:simatic_pcs_firmware::::::::
	cpe:2.3:o:siemens:simatic_pcs_firmware:9.0:-::::::
	cpe:2.3:o:siemens:simatic_pcs_firmware:9.0:sp1::::::
	cpe:2.3:o:siemens:simatic_pcs_firmware:9.0:sp2::::::

cpe:2.3:h:siemens:simatic_pcs:-:*:*:*:*:*:*:*

Configuration 2 (hide)

AND

cpe:2.3:o:siemens:simatic_pdm_firmware:*:*:*:*:*:*:*:*

cpe:2.3:h:siemens:simatic_pdm:-:*:*:*:*:*:*:*

Configuration 3 (hide)

AND

cpe:2.3:o:siemens:simatic_step_7_firmware:*:*:*:*:*:*:*:*

cpe:2.3:h:siemens:simatic_step_7:-:*:*:*:*:*:*:*

Configuration 4 (hide)

AND

OR	cpe:2.3:o:siemens:sinamics_starter_firmware::::::::
	cpe:2.3:o:siemens:sinamics_starter_firmware:5.4:-::::::
	cpe:2.3:o:siemens:sinamics_starter_firmware:5.4:hotfix_1::::::
	cpe:2.3:o:siemens:sinamics_starter_firmware:5.4:hotfix_2::::::

cpe:2.3:h:siemens:sinamics_starter:-:*:*:*:*:*:*:*

Information

Published : 2021-07-13 04:15

Updated : 2021-08-06 07:03

NVD link : CVE-2021-31893

Mitre link : CVE-2021-31893

JSON object : View

CWE

CWE-120

Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

Products Affected

siemens

simatic_step_7_firmware
simatic_pcs_firmware
simatic_pdm
simatic_pcs
sinamics_starter
sinamics_starter_firmware
simatic_pdm_firmware
simatic_step_7

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7.8 /10