High severity · published Jul 13, 2021
CVE-2020-28400
Affected devices contain a vulnerability that allows an unauthenticated attacker to trigger a denial of service condition
7.5
CVSS
1.9%
EPSS
No
On KEV
Description
Affected devices contain a vulnerability that allows an unauthenticated attacker to trigger a denial of service condition. The vulnerability can be triggered if a large amount of DCP reset packets are sent to the device.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.9% · higher than 79% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
DS
DK Standard Ethernet Controller Evaluation Kit Firmware · Siemens
All versions, or not specified · source: NVD
E2
Ek-ertec 200 Evaulation Kit Firmware · Siemens
All versions, or not specified · source: NVD
E2
Ek-ertec 200p Evaluation Kit Firmware · Siemens
before 4.7 · source: NVD
RR
Ruggedcom Rm1224 Firmware · Siemens
before 6.4 · source: NVD
SM
Scalance M-800 Firmware · Siemens
before 6.4 · source: NVD
SS
Scalance S615 Firmware · Siemens
before 6.4 · source: NVD
SW
Scalance W1700 Firmware · Siemens
All versions, or not specified · source: NVD
SW
Scalance W700 Firmware · Siemens
All versions, or not specified · source: NVD
SX
Scalance X200-4 P Irt Firmware · Siemens
before 5.5.0 · source: NVD
SX
Scalance X201-3p Irt Firmware · Siemens
before 5.5.0 · source: NVD
SX
Scalance X201-3p Irt Pro Firmware · Siemens
before 5.5.0 · source: NVD
SX
Scalance X202-2 Irt Firmware · Siemens
before 5.5.0 · source: NVD
Affected product
DS
DK Standard Ethernet Controller Evaluation Kit Firmware
Siemens
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-28400
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-28400
cert-portal.siemens.com
https://cert-portal.siemens.com/productcert/html/ssa-599968.html
Patch
https://cert-portal.siemens.com/productcert/pdf/ssa-599968.pdf
Third Party Advisory
https://us-cert.cisa.gov/ics/advisories/icsa-21-194-03