CVE-2020-27634

criticalPriorität · verfolgen · 37OT-Risiko · erhöhtStack-Kampagne · NUMBER:JACKEPSS 0.017 · 77. PerzentilDEEURUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

1.72% (77th) EPSS

CVSS 9.1 · critical

Is it mine?

37 products

Prüfe deine Angriffsfläche

Who says so?

5 sources

cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · bewertet 2026-10-27

In Contiki 4.5, TCP ISNs are improperly random.

Behebungen

Hersteller-Fix, Mitigation oder Workaround, wie von den Quellen veröffentlicht.

Ein Hersteller-Fix ist verfügbar.

BehobenCapital VSTARcisa_csaf_ot
uIP-Contiki-NG has a patch in progress. See general recommendations below until a patch is made available.
BehobenCycloneTCPcisa_csaf_ot
uIP-Contiki-NG has a patch in progress. See general recommendations below until a patch is made available.
BehobenFNETcisa_csaf_ot
uIP-Contiki-NG has a patch in progress. See general recommendations below until a patch is made available.
BehobenMPLAB Netcisa_csaf_ot
uIP-Contiki-NG has a patch in progress. See general recommendations below until a patch is made available.
BehobenNDKTCPIPcisa_csaf_ot
uIP-Contiki-NG has a patch in progress. See general recommendations below until a patch is made available.
BehobenNucleus NET Allcisa_csaf_ot
uIP-Contiki-NG has a patch in progress. See general recommendations below until a patch is made available.
BehobenNucleus ReadyStart for ARM MIPS and PPCcisa_csaf_ot
uIP-Contiki-NG has a patch in progress. See general recommendations below until a patch is made available.
BehobenNucleus Source Codecisa_csaf_ot
uIP-Contiki-NG has a patch in progress. See general recommendations below until a patch is made available.
BehobenNut/Netcisa_csaf_ot
uIP-Contiki-NG has a patch in progress. See general recommendations below until a patch is made available.
BehobenpicoTCP (EOL)cisa_csaf_ot
uIP-Contiki-NG has a patch in progress. See general recommendations below until a patch is made available.
BehobenpicoTCP-NGcisa_csaf_ot
uIP-Contiki-NG has a patch in progress. See general recommendations below until a patch is made available.
BehobenuC/TCP-IP (EOL)cisa_csaf_ot
uIP-Contiki-NG has a patch in progress. See general recommendations below until a patch is made available.
BehobenuIP (EOL)cisa_csaf_ot
uIP-Contiki-NG has a patch in progress. See general recommendations below until a patch is made available.
BehobenuIP-Contiki-NGcisa_csaf_ot
uIP-Contiki-NG has a patch in progress. See general recommendations below until a patch is made available.
BehobenuIP-Contiki-OS (end-of-life [EOL])cisa_csaf_ot
uIP-Contiki-NG has a patch in progress. See general recommendations below until a patch is made available.
MitigationCapital VSTARcisa_csaf_ot
Nut/Net has a patch in progress. See general recommendations below until a patch is made available.
MitigationCycloneTCPcisa_csaf_ot
Nut/Net has a patch in progress. See general recommendations below until a patch is made available.
MitigationFNETcisa_csaf_ot
Nut/Net has a patch in progress. See general recommendations below until a patch is made available.
MitigationMPLAB Netcisa_csaf_ot
Nut/Net has a patch in progress. See general recommendations below until a patch is made available.
MitigationNDKTCPIPcisa_csaf_ot
Nut/Net has a patch in progress. See general recommendations below until a patch is made available.
MitigationNucleus NET Allcisa_csaf_ot
Nut/Net has a patch in progress. See general recommendations below until a patch is made available.
MitigationNucleus ReadyStart for ARM MIPS and PPCcisa_csaf_ot
Nut/Net has a patch in progress. See general recommendations below until a patch is made available.
MitigationNucleus Source Codecisa_csaf_ot
Nut/Net has a patch in progress. See general recommendations below until a patch is made available.
MitigationNut/Netcisa_csaf_ot
Nut/Net has a patch in progress. See general recommendations below until a patch is made available.
MitigationpicoTCP (EOL)cisa_csaf_ot
Nut/Net has a patch in progress. See general recommendations below until a patch is made available.
MitigationpicoTCP-NGcisa_csaf_ot
Nut/Net has a patch in progress. See general recommendations below until a patch is made available.
MitigationuC/TCP-IP (EOL)cisa_csaf_ot
Nut/Net has a patch in progress. See general recommendations below until a patch is made available.
MitigationuIP (EOL)cisa_csaf_ot
Nut/Net has a patch in progress. See general recommendations below until a patch is made available.
MitigationuIP-Contiki-NGcisa_csaf_ot
Nut/Net has a patch in progress. See general recommendations below until a patch is made available.
MitigationuIP-Contiki-OS (end-of-life [EOL])cisa_csaf_ot
Nut/Net has a patch in progress. See general recommendations below until a patch is made available.

cvss

Technischer Schweregrad, 0–10. Eine Zeile je Quelle.

9.1

010

Basiswert 0–10 · höher = schwerwiegender · Vektor überfahren zum Auflösen⚠ Quellen uneinig · medium–critical · 6.5–9.1

v3.19.1criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Nprimary · NVD / NIST USAusnutzbarkeit 3.9 · Auswirkung 5.2

v3.07.5highCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:Nsecondary · CISA US

v3.16.5mediumAV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:Nsecondary · FSTEC (BDU) RU

v3.18.3highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N/E:Usecondary · CVSS-BT (t0sche)

SSVC

Eine Handlungsentscheidung — aus Ausnutzung und Auswirkung.

Exploitation: none · Automatable: yes · Technical Impact: totalcoordinatorcisa_ssvcUS

schwächen

Die CWE-Schwächeklassen, zu denen dies gehört.

CWE-330USprimärCWE-330USCWE-330US

betroffene Produkte (37)

Betroffene Produkte und Versionsbereiche.

Open Source TCP/IP Stackalle Versionencert_bundDEcpe:/a:open_source:tcpip_stack:-
Siemens Nucleus RTOSalle Versionencert_bundDEcpe:/o:siemens:nucleus_rtos:-
Capital VSTAR: All Versionsalle Versionencisa_csaf_otUS
CycloneTCP: Version 1.9.6 and prioralle Versionencisa_csaf_otUS
FNET: Version 4.6.3alle Versionencisa_csaf_otUS
MPLAB Net: Version 3.6.1 and prioralle Versionencisa_csaf_otUS
NDKTCPIP: Version 2.25 and prioralle Versionencisa_csaf_otUS
Nucleus NET All: versions prior to Version 5.2alle Versionencisa_csaf_otUS
Nucleus ReadyStart for ARM MIPS and PPC: All versions prior to Version 2012.12alle Versionencisa_csaf_otUS
Nucleus Source Code: All Versionsalle Versionencisa_csaf_otUS
Nut/Net: Version 5.1 and prioralle Versionencisa_csaf_otUS
picoTCP (EOL): Version 1.7.0 and prioralle Versionencisa_csaf_otUS
picoTCP-NG: Version 1.7.0 and prioralle Versionencisa_csaf_otUS
uC/TCP-IP (EOL): Version 3.6.0 and prioralle Versionencisa_csaf_otUS
uIP (EOL): Version 1.0 and prioralle Versionencisa_csaf_otUS
uIP-Contiki-NG: Version 4.5 and prioralle Versionencisa_csaf_otUS
uIP-Contiki-OS (end-of-life [EOL]): Version 3.0 and prioralle Versionencisa_csaf_otUS
multiple Capital VSTARalle Versionencisa_csaf_otUS
multiple CycloneTCP≤ 1.9.6cisa_csaf_otUS
multiple FNETalle Versionencisa_csaf_otUS

20 von 37 angezeigt

Advisories (2)

Hersteller- und Ökosystem-Meldungen dazu.

WID-SEC-W-2023-1987TCP/IP Stack: Mehrere SchwachstellenDeutsch2021-02-11csaf · cert_bundDE
Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in TCP/IP Stack ausnutzen, um beliebigen Programmcode auszuführen, einen Denial-of-Service-Zustand herbeiführen oder Sicherheitsvorkehrungen umgehen.
ICSA-21-042-01Multiple Embedded TCP/IP Stacks (Update B)2021-02-11icsa · cisa_csaf_otUS
Successful exploitation of weak initial sequence numbers (ISN) can be used to hijack or spoof TCP connections, cause denial-of-service conditions, inject malicious data, or bypass authentication.

auch bekannt als (4)

Weitere Namen und Kennungen dieser Entität.

quellen

Welche Quellen diesen Datensatz belegen und wann.

cnnvd enisa_euvd fstec_bdu cert_bund cisa_csaf_ot NVD CVE.org MITRE

veröffentlicht 2023-10-10geändert 2026-06-17

verwandt (573)

Verwandte Einträge.

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CVE-2019-5420US	critical9.8OT kritisch	89.3% (100th)	Exploit	2019-03-27
A remote code execution vulnerability in development mode Rails <5.2.2.1, <6.0.0.beta3 can allow an attacker to guess the automatically generated development mode secret token. Thi…
CVE-2021-34646US	critical9.8OT hoch	50.9% (99th)	Exploit	2021-08-30
Versions up to, and including, 5.4.3, of the Booster for WooCommerce WordPress plugin are vulnerable to authentication bypass via the process_email_verification function due to a r…
CVE-2018-17888US	critical9.8OT hoch	29.6% (98th)	Exploit	2018-10-12
NUUO CMS all versions 3.1 and prior, The application uses a session identification mechanism that could allow attackers to obtain the active session ID, which could allow arbitrary…
CVE-2017-6026US	critical9.1OT hoch	31.8% (98th)	Exploit	2017-06-30
A Use of Insufficiently Random Values issue was discovered in Schneider Electric Modicon PLCs Modicon M241, firmware versions prior to Version 4.0.5.11, and Modicon M251, firmware…
CVE-2022-36536US	critical9.8OT hoch	4.85% (92nd)	Exploit	2022-09-16
An issue in the component post_applogin.php of Super Flexible Software GmbH & Co. KG Syncovery 9 for Linux v9.47x and below allows attackers to escalate privileges via creating cra…

+568 weitere

Referenzen (11)

Externe Belege — Patches, Meldungen, Analysen.

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