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SiemensCVE-2021-33720

HistorySep 14, 2021 - 11:15 a.m.

CVE-2021-33720

2021-09-1411:15:24

CWE-120

siemens

web.nvd.nist.gov

siprotec 5

cpu variants

vulnerability

denial-of-service

nvd

cve-2021-33720

CVSS2

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

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

CVSS3

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

AI Score

7.2

Confidence

High

EPSS

0.001

Percentile

42.5%

JSON

A vulnerability has been identified in SIPROTEC 5 relays with CPU variants CP050 (All versions < V8.80), SIPROTEC 5 relays with CPU variants CP100 (All versions < V8.80), SIPROTEC 5 relays with CPU variants CP300 (All versions < V8.80). Specially crafted packets sent to port 4443/tcp could cause a Denial-of-Service condition.

Affected configurations

Nvd

Node

siemenssiprotec_5_with_cpu_variant_cp050Range<8.80

siemenssiprotec_5_with_cpu_variant_cp100Range<8.80

siemenssiprotec_5_with_cpu_variant_cp300Range<8.80

VendorProductVersionCPE
siemenssiprotec_5_with_cpu_variant_cp050*cpe:2.3:o:siemens:siprotec_5_with_cpu_variant_cp050:*:*:*:*:*:*:*:*
siemenssiprotec_5_with_cpu_variant_cp100*cpe:2.3:o:siemens:siprotec_5_with_cpu_variant_cp100:*:*:*:*:*:*:*:*
siemenssiprotec_5_with_cpu_variant_cp300*cpe:2.3:o:siemens:siprotec_5_with_cpu_variant_cp300:*:*:*:*:*:*:*:*

Vendor	Product	Version	CPE
siemens	siprotec_5_with_cpu_variant_cp050	*	cpe:2.3:o:siemens:siprotec_5_with_cpu_variant_cp050::::::::
siemens	siprotec_5_with_cpu_variant_cp100	*	cpe:2.3:o:siemens:siprotec_5_with_cpu_variant_cp100::::::::
siemens	siprotec_5_with_cpu_variant_cp300	*	cpe:2.3:o:siemens:siprotec_5_with_cpu_variant_cp300::::::::

CNA Affected

[
  {
    "product": "SIPROTEC 5 relays with CPU variants CP050",
    "vendor": "Siemens",
    "versions": [
      {
        "status": "affected",
        "version": "All versions < V8.80"
      }
    ]
  },
  {
    "product": "SIPROTEC 5 relays with CPU variants CP100",
    "vendor": "Siemens",
    "versions": [
      {
        "status": "affected",
        "version": "All versions < V8.80"
      }
    ]
  },
  {
    "product": "SIPROTEC 5 relays with CPU variants CP300",
    "vendor": "Siemens",
    "versions": [
      {
        "status": "affected",
        "version": "All versions < V8.80"
      }
    ]
  }
]

References

cert-portal.siemens.com/productcert/pdf/ssa-847986.pdf

CVSS2

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

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

CVSS3

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

AI Score

7.2

Confidence

High

EPSS

0.001

Percentile

42.5%

JSON

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