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MitreCVE-2021-45117

HistoryMar 21, 2022 - 3:15 p.m.

CVE-2021-45117

2022-03-2115:15:07

CWE-476

mitre

web.nvd.nist.gov

cve-2021-45117

opc

ansi c

stack stubs

nodesets

error handling

null pointer dereference

nvd

CVSS2

4.3

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

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

CVSS3

6.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

AI Score

6.4

Confidence

High

EPSS

0.001

Percentile

46.8%

JSON

The OPC autogenerated ANSI C stack stubs (in the NodeSets) do not handle all error cases. This can lead to a NULL pointer dereference.

Affected configurations

Nvd

Node

opcfoundationua-nodesetRange<1.05.01

Node

siemenssimatic_net_pcMatch14-

siemenssimatic_net_pcMatch15-

siemenssimatic_net_pcMatch16-

siemenssimatic_net_pcMatch17-

siemenssitop_managerMatch-

siemenstelecontrol_server_basicMatch3.0

VendorProductVersionCPE
opcfoundationua-nodeset*cpe:2.3:a:opcfoundation:ua-nodeset:*:*:*:*:*:*:*:*
siemenssimatic_net_pc14cpe:2.3:a:siemens:simatic_net_pc:14:-:*:*:*:*:*:*
siemenssimatic_net_pc15cpe:2.3:a:siemens:simatic_net_pc:15:-:*:*:*:*:*:*
siemenssimatic_net_pc16cpe:2.3:a:siemens:simatic_net_pc:16:-:*:*:*:*:*:*
siemenssimatic_net_pc17cpe:2.3:a:siemens:simatic_net_pc:17:-:*:*:*:*:*:*
siemenssitop_manager-cpe:2.3:a:siemens:sitop_manager:-:*:*:*:*:*:*:*
siemenstelecontrol_server_basic3.0cpe:2.3:a:siemens:telecontrol_server_basic:3.0:*:*:*:*:*:*:*

Vendor	Product	Version	CPE
opcfoundation	ua-nodeset	*	cpe:2.3:a:opcfoundation:ua-nodeset::::::::
siemens	simatic_net_pc	14	cpe:2.3:a:siemens:simatic_net_pc:14:-::::::
siemens	simatic_net_pc	15	cpe:2.3:a:siemens:simatic_net_pc:15:-::::::
siemens	simatic_net_pc	16	cpe:2.3:a:siemens:simatic_net_pc:16:-::::::
siemens	simatic_net_pc	17	cpe:2.3:a:siemens:simatic_net_pc:17:-::::::
siemens	sitop_manager	-	cpe:2.3:a:siemens:sitop_manager:-:::::::*
siemens	telecontrol_server_basic	3.0	cpe:2.3:a:siemens:telecontrol_server_basic:3.0:::::::*

References

cert-portal.siemens.com/productcert/pdf/ssa-285795.pdf

files.opcfoundation.org/SecurityBulletins/OPC%20Foundation%20Security%20Bulletin%20CVE-2021-45117.pdf

www.youtube.com/watch?v=qv-RBdCaV4k

Social References

CVSS2

4.3

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

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

CVSS3

6.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

AI Score

6.4

Confidence

High

EPSS

0.001

Percentile

46.8%

JSON

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