CVE-2020-35684

An issue was discovered in HCC Nichestack 3.0. The code that parses TCP packets relies on an unchecked value of the IP payload size (extracted from the IP header) to compute the length of the TCP payload within the TCP checksum computation function. When the IP payload size is set to be smaller than the size of the IP header, the TCP checksum computation function may read out of bounds (a low-impact write-out-of-bounds is also possible).

CVSS v3.0 7.5 HIGH
CVSS v2.0 5.0 MEDIUM

7.5^/10

CVSS v3.0 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

5.0^/10

CVSS v2.0 : MEDIUM

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

Exploitability : 10.0 / Impact : 2.9

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact PARTIAL

References

Link	Resource
https://cert-portal.siemens.com/productcert/pdf/ssa-789208.pdf	Mitigation Third Party Advisory
https://www.hcc-embedded.com	Product
https://www.kb.cert.org/vuls/id/608209	Third Party Advisory US Government Resource
https://www.forescout.com/blog/new-critical-operational-technology-vulnerabilities-found-on-nichestack/	Mitigation Third Party Advisory

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Configurations

Configuration 1 (hide)

cpe:2.3:a:hcc-embedded:nichestack:3.0:*:*:*:*:*:*:*

Configuration 2 (hide)

AND

cpe:2.3:o:siemens:sentron_3wl_com35_firmware:*:*:*:*:*:*:*:*

cpe:2.3:h:siemens:sentron_3wl_com35:-:*:*:*:*:*:*:*

Configuration 3 (hide)

AND

cpe:2.3:o:siemens:sentron_3wa_com190_firmware:*:*:*:*:*:*:*:*

cpe:2.3:h:siemens:sentron_3wa_com190:-:*:*:*:*:*:*:*

Information

Published : 2021-08-19 05:15

Updated : 2021-08-26 11:21

NVD link : CVE-2020-35684

Mitre link : CVE-2020-35684

JSON object : View

CWE

CWE-20

Improper Input Validation

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Products Affected

hcc-embedded

nichestack

siemens

sentron_3wa_com190
sentron_3wa_com190_firmware
sentron_3wl_com35_firmware
sentron_3wl_com35

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