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[email protected]CVE-2020-22552

HistoryOct 28, 2020 - 2:15 p.m.

CVE-2020-22552

2020-10-2814:15:12

[email protected]

web.nvd.nist.gov

cve-2020-22552

snap7 server

version 1.4.1

cotp protocol

crafted packet

crash

nvd

5 Medium

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

7.5 High

CVSS3

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

7.3 High

AI Score

Confidence

High

0.002 Low

EPSS

Percentile

64.5%

JSON

The Snap7 server component in version 1.4.1, when an attacker sends a crafted packet with COTP protocol the last-data-unit flag set to No and S7 writes a var function, the Snap7 server will be crashed.

Affected configurations

NVD

Node

snap7_projectsnap7Match1.4.1

CPENameOperatorVersion
snap7_project:snap7snap7 project snap7eq1.4.1

CPE	Name	Operator	Version
snap7_project:snap7	snap7 project snap7	eq	1.4.1

References

snap7.com

sourceforge.net/p/snap7/discussion/bugfix/thread/456d76fdde/

sourceforge.net/projects/snap7/

5 Medium

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

7.5 High

CVSS3

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

7.3 High

AI Score

Confidence

High

0.002 Low

EPSS

Percentile

64.5%

JSON

Related for CVE-2020-22552

cvelist1 nvd1 prion1