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IcscertCVE-2021-27434

HistoryMay 20, 2021 - 2:15 p.m.

CVE-2021-27434

2021-05-2014:15:07

CWE-200

CWE-674

icscert

web.nvd.nist.gov

cve-2021-27434

information security

vulnerability

opc ua

sdk bundle

unified automation

.net

nvd

CVSS2

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

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

CVSS3

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

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

AI Score

7.4

Confidence

High

EPSS

0.002

Percentile

55.6%

JSON

Products with Unified Automation .NET based OPC UA Client/Server SDK Bundle: Versions V3.0.7 and prior (.NET 4.5, 4.0, and 3.5 Framework versions only) are vulnerable to an uncontrolled recursion, which may allow an attacker to trigger a stack overflow.

Affected configurations

Nvd

Node

unified-automation.net_based_opc_ua_client\/server_sdkRange≤3.0.7

AND

microsoft.net_frameworkMatch3.5

microsoft.net_frameworkMatch4.0

microsoft.net_frameworkMatch4.5

VendorProductVersionCPE
unified-automation.net_based_opc_ua_client\/server_sdk*cpe:2.3:a:unified-automation:.net_based_opc_ua_client\/server_sdk:*:*:*:*:*:*:*:*
microsoft.net_framework3.5cpe:2.3:a:microsoft:.net_framework:3.5:*:*:*:*:*:*:*
microsoft.net_framework4.0cpe:2.3:a:microsoft:.net_framework:4.0:*:*:*:*:*:*:*
microsoft.net_framework4.5cpe:2.3:a:microsoft:.net_framework:4.5:*:*:*:*:*:*:*

Vendor	Product	Version	CPE
unified-automation	.net_based_opc_ua_client\/server_sdk	*	cpe:2.3:a:unified-automation:.net_based_opc_ua_client\/server_sdk::::::::
microsoft	.net_framework	3.5	cpe:2.3:a:microsoft:.net_framework:3.5:::::::*
microsoft	.net_framework	4.0	cpe:2.3:a:microsoft:.net_framework:4.0:::::::*
microsoft	.net_framework	4.5	cpe:2.3:a:microsoft:.net_framework:4.5:::::::*

CNA Affected

[
  {
    "product": "OPC UA Products Built with the .NET Framework 4.5, 4.0, and 3.5",
    "vendor": "n/a",
    "versions": [
      {
        "status": "affected",
        "version": "Unified Automation .NET based OPC UA Client/Server SDK Bundle: Versions V3.0.7 and prior (.NET 4.5, 4.0, and 3.5 Framework versions only)"
      }
    ]
  }
]

References

us-cert.cisa.gov/ics/advisories/icsa-21-133-04

Social References

CVSS2

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

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

CVSS3

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

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

AI Score

7.4

Confidence

High

EPSS

0.002

Percentile

55.6%

JSON

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