CVE-2020-3165

mediumPriorität · verfolgen · 34OT-Risiko · erhöhtEPSS 0.016 · 75. PerzentilEURUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

1.56% (75th) EPSS

CVSS 4.3 · medium

Is it mine?

20 products

Prüfe deine Angriffsfläche

Who says so?

5 sources

cnnvd · enisa_euvd · fstec_bdu · cisco_csaf

EPSS · bewertet 2026-10-26

A vulnerability in the implementation of Border Gateway Protocol (BGP) Message Digest 5 (MD5) authentication in Cisco NX-OS Software could allow an unauthenticated, remote attacker to bypass MD5 authentication and establish a BGP connection with the device. The vulnerability occurs because the BGP MD5 authentication is bypassed if the peer does not have MD5 authentication configured, the NX-OS device does have BGP MD5 authentication configured, and the NX-OS BGP virtual routing and forwarding (VRF) name is configured to be greater than 19 characters. An attacker could exploit this vulnerability by attempting to establish a BGP session with the NX-OS peer. A successful exploit could allow the attacker to establish a BGP session with the NX-OS device without MD5 authentication. The Cisco implementation of the BGP protocol accepts incoming BGP traffic only from explicitly configured peers. To exploit this vulnerability, an attacker must send the malicious packets over a TCP connection that appears to come from a trusted BGP peer. To do so, the attacker must obtain information about the BGP peers in the affected system’s trusted network.

Behebungen

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

Ein Hersteller-Fix ist verfügbar.

BehobenCisco NX-OS Software 9.2(1) when installed on Cisco Nexus 3000 Series Switchescisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
BehobenCisco NX-OS Software 9.2(1) when installed on Cisco Nexus 9000 Series Switchescisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
BehobenCisco NX-OS Software 9.2(2) when installed on Cisco Nexus 3000 Series Switchescisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
BehobenCisco NX-OS Software 9.2(2) when installed on Cisco Nexus 9000 Series Switchescisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
BehobenCisco NX-OS Software 9.2(2t) when installed on Cisco Nexus 3000 Series Switchescisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
BehobenCisco NX-OS Software 9.2(2v) when installed on Cisco Nexus 3000 Series Switchescisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
BehobenCisco NX-OS Software 9.2(3) when installed on Cisco Nexus 3000 Series Switchescisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
BehobenCisco NX-OS Software 9.2(3) when installed on Cisco Nexus 9000 Series Switchescisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
BehobenCisco NX-OS Software 9.2(3y) when installed on Cisco Nexus 3000 Series Switchescisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
BehobenCisco NX-OS Software 9.2(3y) when installed on Cisco Nexus 9000 Series Switchescisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
BehobenCisco NX-OS Software 9.3(1) when installed on Cisco Nexus 3000 Series Switchescisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
BehobenCisco NX-OS Software 9.3(1) when installed on Cisco Nexus 9000 Series Switchescisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
BehobenCisco NX-OS Software 9.3(1z) when installed on Cisco Nexus 9000 Series Switchescisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com

cvss

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

8.2

010

Basiswert 0–10 · höher = schwerwiegender · Vektor überfahren zum Auflösen⚠ Quellen uneinig · medium–high · 4.3–8.2

v2.04.3mediumAV:N/AC:M/Au:N/C:N/I:P/A:Nprimary · NVD / NIST USAusnutzbarkeit 8.6 · Auswirkung 2.9

v3.18.2highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:Nprimary · NVD / NIST USAusnutzbarkeit 3.9 · Auswirkung 4.2

v3.08.2highCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:Nsecondary · ENISA EU

v3.08.2highCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:Nsecondary · psirt@cisco.com USAusnutzbarkeit 3.9 · Auswirkung 4.2

v3.08.2highCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:Nsecondary · Cisco PSIRT US

v3.18.2highAV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:Nsecondary · FSTEC (BDU) RU

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N/E:Usecondary · CVSS-BT (t0sche)

SSVC

Eine Handlungsentscheidung — aus Ausnutzung und Auswirkung.

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

schwächen

Die CWE-Schwächeklassen, zu denen dies gehört.

CWE-798USprimärCWE-798US

betroffene Produkte (20)

Betroffene Produkte und Versionsbereiche.

Cisco NX-OS Software 9.2(1) when installed on Cisco Nexus 3000 Series Switchesalle Versionencisco_csafUS
Cisco NX-OS Software 9.2(1) when installed on Cisco Nexus 9000 Series Switchesalle Versionencisco_csafUS
Cisco NX-OS Software 9.2(2) when installed on Cisco Nexus 3000 Series Switchesalle Versionencisco_csafUS
Cisco NX-OS Software 9.2(2) when installed on Cisco Nexus 9000 Series Switchesalle Versionencisco_csafUS
Cisco NX-OS Software 9.2(2t) when installed on Cisco Nexus 3000 Series Switchesalle Versionencisco_csafUS
Cisco NX-OS Software 9.2(2v) when installed on Cisco Nexus 3000 Series Switchesalle Versionencisco_csafUS
Cisco NX-OS Software 9.2(3) when installed on Cisco Nexus 3000 Series Switchesalle Versionencisco_csafUS
Cisco NX-OS Software 9.2(3) when installed on Cisco Nexus 9000 Series Switchesalle Versionencisco_csafUS
Cisco NX-OS Software 9.2(3y) when installed on Cisco Nexus 3000 Series Switchesalle Versionencisco_csafUS
Cisco NX-OS Software 9.2(3y) when installed on Cisco Nexus 9000 Series Switchesalle Versionencisco_csafUS
Cisco NX-OS Software 9.3(1) when installed on Cisco Nexus 3000 Series Switchesalle Versionencisco_csafUS
Cisco NX-OS Software 9.3(1) when installed on Cisco Nexus 9000 Series Switchesalle Versionencisco_csafUS
Cisco NX-OS Software 9.3(1z) when installed on Cisco Nexus 9000 Series Switchesalle Versionencisco_csafUS
Cisco Cisco NX-OS Software≤ 9.2(1)enisa_euvdEU
Cisco Systems Inc. NX-OS≤ 9.3(1)fstec_bduRU
Cisco Systems Inc. NX-OS9.2 → 9.2(3)fstec_bduRU
cisco nx-os= 9.2(1)nvdUScpe:2.3:o:cisco:nx-os:*:*:*:*:*:*:*:*
cisco nx-os= 9.2(2)nvdUScpe:2.3:o:cisco:nx-os:*:*:*:*:*:*:*:*
cisco nx-os= 9.2(3)nvdUScpe:2.3:o:cisco:nx-os:*:*:*:*:*:*:*:*
cisco nx-os= 9.3(1)nvdUScpe:2.3:o:cisco:nx-os:*:*:*:*:*:*:*:*

Advisories (1)

Hersteller- und Ökosystem-Meldungen dazu.

cisco-sa-20200226-nxos-bgpmd5Cisco NX-OS Software Border Gateway Protocol MD5 Authentication Bypass Vulnerability2020-02-26csaf · cisco_csafUS
A vulnerability in the implementation of Border Gateway Protocol (BGP) Message Digest 5 (MD5) authentication in Cisco NX-OS Software could allow an unauthenticated, remote attacker to bypass MD5 authentication and establish a BGP connection with the device. The vulnerability occurs because the BGP MD5 authentication is bypassed if the peer does not have MD5 authentication configured, the NX-OS device does have BGP MD5 authentication configured, and the NX-OS BGP virtual routing and forwarding (VRF) name is configured to be greater than 19 characters. An attacker could exploit this vulnerability by attempting to establish a BGP session with the NX-OS peer. A successful exploit could allow the attacker to establish a BGP session with the NX-OS device without MD5 authentication. The Cisco implementation of the BGP protocol accepts incoming BGP traffic only from explicitly configured peers. To exploit this vulnerability, an attacker must send the malicious packets over a TCP connection that appears to come from a trusted BGP peer. To do so, the attacker must obtain information about the BGP peers in the affected system’s trusted network. Cisco has released software updates that address this vulnerability. There are workarounds that address this vulnerability. This advisory is available at the following link: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20200226-nxos-bgpmd5 ["https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20200226-nxos-bgpmd5"]

auch bekannt als (4)

Weitere Namen und Kennungen dieser Entität.

quellen

Welche Quellen diesen Datensatz belegen und wann.

cnnvd enisa_euvd fstec_bdu cisco_csaf nvd NVD CVE.org MITRE

veröffentlicht 2020-02-26geändert 2026-06-17

verwandt (2,280)

Verwandte Einträge.

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+2275 weitere

Referenzen (7)

Externe Belege — Patches, Meldungen, Analysen.

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