CVE-2017-12319

highPriorität · handeln · 90OT-Risiko · kritischKEV · ausgenutztEPSS 0.052 · 92. PerzentilEURUUS
grimoire priorityP0 · Act now
Exploitable?
Yes · in the wild
CISA KEV
Likely / severe?
5.24% (92nd) EPSS
CVSS 7.1 · high
Is it mine?
124 products
Prüfe deine Angriffsfläche
Who says so?
4 sources
cnnvd · enisa_euvd · fstec_bdu · cisco_csaf

hinzugefügt 2022-03-03beheben bis 2022-03-24

erforderliche Maßnahme Apply updates per vendor instructions.

EPSS · bewertet 2026-10-27

Cisco IOS XE Software Ethernet Virtual Private Network Border Gateway Protocol Denial-of-Service Vulnerability

A vulnerability in the Border Gateway Protocol (BGP) over an Ethernet Virtual Private Network (EVPN) for Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause the device to reload, resulting in a denial of service (DoS) condition, or potentially corrupt the BGP routing table, which could result in network instability. The vulnerability exists due to changes in the implementation of the BGP MPLS-Based Ethernet VPN RFC (RFC 7432) draft between IOS XE software releases. When the BGP Inclusive Multicast Ethernet Tag Route or BGP EVPN MAC/IP Advertisement Route update packet is received, it could be possible that the IP address length field is miscalculated. An attacker could exploit this vulnerability by sending a crafted BGP packet to an affected device after the BGP session was established. An exploit could allow the attacker to cause the affected device to reload or corrupt the BGP routing table; either outcome would result in a DoS. The vulnerability may be triggered when the router receives a crafted BGP message from a peer on an existing BGP session. This vulnerability affects all releases of Cisco IOS XE Software prior to software release 16.3 that support BGP EVPN configurations. If the device is not configured for EVPN, it is not vulnerable. Cisco Bug IDs: CSCui67191, CSCvg52875.

01

Behebungen

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

Ein Hersteller-Fix ist verfügbar.

02

cvss

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

7.1
010

Basiswert 0–10 · höher = schwerwiegender · Vektor überfahren zum Auflösen⚠ Quellen uneinig · medium–high · 5.9–7.1

v2.07.1highAV:N/AC:M/Au:N/C:N/I:N/A:Cprimary · NVD / NIST USAusnutzbarkeit 8.6 · Auswirkung 6.9
v3.15.9mediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:Hprimary · NVD / NIST USAusnutzbarkeit 2.2 · Auswirkung 3.6
v3.06.8mediumCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:Hsecondary · Cisco PSIRT US
v3.15.9mediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H/E:Hsecondary · CVSS-BT (t0sche)
v3.15.9mediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · ENISA EU
v3.15.9mediumAV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · FSTEC (BDU) RU
v3.15.9mediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:HsecondaryAusnutzbarkeit 2.2 · Auswirkung 3.6
03

SSVC

Eine Handlungsentscheidung — aus Ausnutzung und Auswirkung.

Exploitation: active · Automatable: yes · Technical Impact: partialcoordinatorcisa_ssvcUS
04

schwächen

Die CWE-Schwächeklassen, zu denen dies gehört.

CWE-20USCWE-20US
05

betroffene Produkte (124)

Betroffene Produkte und Versionsbereiche.

20 von 124 angezeigt
06

Advisories (1)

Hersteller- und Ökosystem-Meldungen dazu.

  • cisco-sa-20171103-bgpCisco IOS XE Software Ethernet Virtual Private Network Border Gateway Protocol Denial of Service Vulnerability2017-11-03csaf · cisco_csafUS

    A vulnerability in the Border Gateway Protocol (BGP) over an Ethernet Virtual Private Network (EVPN) for Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause the device to reload, resulting in a denial of service (DoS) condition, or potentially corrupt the BGP routing table, which could result in network instability. The vulnerability exists due to changes in the implementation of the BGP MPLS-Based Ethernet VPN RFC (RFC 7432) ["https://tools.ietf.org/html/rfc7432"] draft between IOS XE software releases. When the BGP Inclusive Multicast Ethernet Tag Route or BGP EVPN MAC/IP Advertisement Route update packet is received, it could be possible that the IP address length field is miscalculated. An attacker could exploit this vulnerability by sending a crafted BGP packet to an affected device after the BGP session was established. An exploit could allow the attacker to cause the affected device to reload or corrupt the BGP routing table; either outcome would result in a DoS. The Cisco implementation of the BGP protocol only accepts incoming BGP traffic from explicitly defined peers. To exploit this vulnerability, an attacker must be able to send the malicious packets over a TCP connection that appears to come from a trusted BGP peer, or inject malformed messages into the victim's BGP network. This would require obtaining information about the BGP peers in the affected system's trusted network. The vulnerability may be triggered when the router receives a crafted BGP message from a peer on an existing BGP session. At least one BGP neighbor session must be established for a router to be vulnerable. There are no workarounds that address this vulnerability. This advisory is available at the following link: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20171103-bgp ["https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20171103-bgp"]

07

auch bekannt als (4)

Weitere Namen und Kennungen dieser Entität.

08

quellen

Welche Quellen diesen Datensatz belegen und wann.

cnnvdenisa_euvdfstec_bducisco_csafNVDCVE.orgMITRE
veröffentlicht 2018-03-27geändert 2026-06-17
09

Referenzen (7)

Externe Belege — Patches, Meldungen, Analysen.

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