Vulnerability-Lookup

CNVD-2022-55146

Vulnerability from cnvd - Published: 2022-08-04

Title

Cisco IOS XR BGP Ethernet VPN拒绝服务漏洞

Description

Cisco IOS XR是美国思科（Cisco）公司的一套为其网络设备开发的操作系统。 Cisco IOS XR BGP Ethernet VPN存在拒绝服务漏洞，攻击者可利用该漏洞导致拒绝服务。

Severity

高

Formal description

厂商尚未提供漏洞修复方案，请关注厂商主页更新： https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-bgpevpn-zWTRtPBb

Reference

https://vigilance.fr/vulnerability/Cisco-IOS-XR-denial-of-service-via-BGP-Ethernet-VPN-38054

Impacted products

Name
Cisco Cisco IOS XR

Show details on source website

JSON

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  "cves": {
    "cve": {
      "cveNumber": "CVE-2022-20758",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2022-20758"
    }
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  "number": "CNVD-2022-55146",
  "openTime": "2022-08-04",
  "products": {
    "product": "Cisco Cisco IOS XR"
  },
  "referenceLink": "https://vigilance.fr/vulnerability/Cisco-IOS-XR-denial-of-service-via-BGP-Ethernet-VPN-38054",
  "serverity": "\u9ad8",
  "submitTime": "2022-04-15",
  "title": "Cisco IOS XR BGP Ethernet VPN\u62d2\u7edd\u670d\u52a1\u6f0f\u6d1e"
}

CVE-2022-20758 (GCVE-0-2022-20758)

Vulnerability from cvelistv5 – Published: 2022-04-15 14:20 – Updated: 2024-11-06 16:24

Title

Cisco IOS XR Software Border Gateway Protocol Ethernet VPN Denial of Service Vulnerability

Summary

A vulnerability in the implementation of the Border Gateway Protocol (BGP) Ethernet VPN (EVPN) functionality in Cisco IOS XR Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition. This vulnerability is due to the incorrect processing of a BGP update message that contains specific EVPN attributes. An attacker could exploit this vulnerability by sending a BGP update message that contains specific EVPN attributes. To exploit this vulnerability, an attacker must control a BGP speaker that has an established trusted peer connection to an affected device that is configured with the address family L2VPN EVPN to receive and process the update message. This vulnerability cannot be exploited by any data that is initiated by clients on the Layer 2 network or by peers that are not configured to accept the L2VPN EVPN address family. A successful exploit could allow the attacker to cause the BGP process to restart unexpectedly, resulting in a DoS condition. The Cisco implementation of BGP accepts incoming BGP updates only from explicitly defined peers. For this vulnerability to be exploited, the malicious BGP update message must either come from a configured, valid BGP peer or be injected by the attacker into the affected BGP network on an existing, valid TCP connection to a BGP peer.

Severity

6.8 (Medium)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2024-11-06 15:58 UTC

CWE

CWE-399

Assigner

cisco CNA under the mitre root

CNA scorecard C 66/100 over 434 records in the last 180 days details

References

1 reference

URL	Tags
https://tools.cisco.com/security/center/content/C…	vendor-advisoryx_refsource_CISCO

Impacted products

1 product

Vendor	Product	Version
Cisco	Cisco IOS XR Software	Affected: n/a

Date Public

2022-04-13 00:00

Show details on NVD website

JSON

To clipboard

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        "providerMetadata": {
          "dateUpdated": "2024-08-03T02:24:49.409Z",
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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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