CVE-2020-27632

HIGH

7.5

Description

In SIMATIC MV400 family versions prior to v7.0.6, the ISN generator is initialized with a constant value and has constant increments. An attacker could predict and hijack TCP sessions.

Details CVE

Score CVSS v3.17.5

SeveriteHIGH

Vecteur CVSSCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Vecteur d'attaqueNETWORK

ComplexiteLOW

Privileges requisNONE

Interaction utilisateurNONE

Publie3/10/2021

Derniere modification11/21/2024

Sourcenvd

Observations honeypot0

Produits affectes

siemens:simatic_mv420siemens:simatic_mv420_firmwaresiemens:simatic_mv440siemens:simatic_mv440_firmware

References

https://cert-portal.siemens.com/productcert/pdf/ssa-599268.pdf(cve@mitre.org)

https://www.cisa.gov/news-events/ics-advisories/icsa-21-042-01(cve@mitre.org)

https://www.forescout.com/resources/numberjack-weak-isn-generation-in-embedded-tcpip-stacks/(cve@mitre.org)

https://cert-portal.siemens.com/productcert/pdf/ssa-599268.pdf(af854a3a-2127-422b-91ae-364da2661108)

https://www.cisa.gov/news-events/ics-advisories/icsa-21-042-01(af854a3a-2127-422b-91ae-364da2661108)

https://www.forescout.com/resources/numberjack-weak-isn-generation-in-embedded-tcpip-stacks/(af854a3a-2127-422b-91ae-364da2661108)

Correlations IOC

Aucune correlation enregistree

This product uses data from the NVD API but is not endorsed or certified by the NVD.