CVE-2021-31889 : A vulnerability has been identified in Capital Embedded AR Classic 431-422 (All

A vulnerability has been identified in Capital Embedded AR Classic 431-422 (All versions), Capital Embedded AR Classic R20-11 (All versions < V2303), PLUSCONTROL 1st Gen (All versions), SIMOTICS CONNECT 400 (All versions < V0.5.0.0). Malformed TCP packets with a corrupted SACK option leads to Information Leaks and Denial-of-Service conditions. (FSMD-2021-0015)

Published 2021-11-09 12:15:10

Updated 2024-10-08 09:15:06

Source Siemens AG

View at NVD, CVE.org

Vulnerability category: Denial of service

Products affected by CVE-2021-31889

Siemens » Apogee Modular Equiment Controller Firmware
cpe:2.3:o:siemens:apogee_modular_equiment_controller_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Siemens » Apogee Modular Equiment Controller » Version: N/A
Siemens » Apogee Modular Building Controller Firmware
cpe:2.3:o:siemens:apogee_modular_building_controller_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Siemens » Apogee Modular Building Controller » Version: N/A
Siemens » Nucleus Net
cpe:2.3:a:siemens:nucleus_net:*:*:*:*:*:*:*:*
Matching versions
Siemens » Nucleus Source Code
cpe:2.3:a:siemens:nucleus_source_code:*:*:*:*:*:*:*:*
Matching versions
Siemens » Capital Vstar
cpe:2.3:a:siemens:capital_vstar:*:*:*:*:*:*:*:*
Matching versions
Siemens » Apogee Pxc Compact Firmware
cpe:2.3:o:siemens:apogee_pxc_compact_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Siemens » Apogee Pxc Compact » Version: N/A
Siemens » Apogee Pxc Modular Firmware
cpe:2.3:o:siemens:apogee_pxc_modular_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Siemens » Apogee Pxc Modular » Version: N/A
Siemens » Talon Tc Compact Firmware
cpe:2.3:o:siemens:talon_tc_compact_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Siemens » Talon Tc Compact » Version: N/A
Siemens » Talon Tc Modular Firmware
cpe:2.3:o:siemens:talon_tc_modular_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Siemens » Talon Tc Modular » Version: N/A
Siemens » Nucleus Readystart V3
Versions before (<) 2017.02.3
cpe:2.3:a:siemens:nucleus_readystart_v3:*:*:*:*:*:*:*:*
Matching versions

Exploit prediction scoring system (EPSS) score for CVE-2021-31889

EPSS FAQ

0.71%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 71 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2021-31889

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source	First Seen
6.4	MEDIUM	AV:N/AC:L/Au:N/C:P/I:N/A:P	10.0	4.9	NIST
Access Vector: Network Access Complexity: Low Authentication: None Confidentiality Impact: Partial Integrity Impact: None Availability Impact: Partial
9.1	CRITICAL	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H	3.9	5.2	NIST
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Unchanged Confidentiality: High Integrity: None Availability: High
7.5	HIGH	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	3.9	3.6	Siemens AG	2024-10-08
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Unchanged Confidentiality: None Integrity: None Availability: High

CWE ids for CVE-2021-31889

CWE-191 Integer Underflow (Wrap or Wraparound)

The product subtracts one value from another, such that the result is less than the minimum allowable integer value, which produces a value that is not equal to the correct result.

Assigned by: productcert@siemens.com (Primary)

References for CVE-2021-31889

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Vulnerability Details : CVE-2021-31889

Products affected by CVE-2021-31889

Exploit prediction scoring system (EPSS) score for CVE-2021-31889

CVSS scores for CVE-2021-31889

CWE ids for CVE-2021-31889

References for CVE-2021-31889