Vulnerability-Lookup

CNVD-2021-14807

Vulnerability from cnvd - Published: 2021-03-07

Title

Cisco IOS XR访问控制错误漏洞（CNVD-2021-14807）

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软件中SNMP管理面板存在访问控制错误漏洞中存在漏洞。该漏洞是由于在将SNMP与管理平面保护配合使用时，LPTS编程不正确造成的。即使配置为拒绝访问SNMP的管理平面保护，也允许未经身份验证的远程攻击者允许连接受影响设备的服务器。

Severity

中

Patch Name

Cisco IOS XR访问控制错误漏洞（CNVD-2021-14807）的补丁

Patch Description

Formal description

厂商已发布了漏洞修复程序，请及时关注更新： https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-snmp-7MKrW7Nq

Reference

https://vigilance.fr/vulnerability/Cisco-IOS-XR-privilege-escalation-via-SNMP-ACL-Bypass-34478

Impacted products

Name
Cisco IOS XR

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2021-1243",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2021-1243"
    }
  },
  "description": "Cisco IOS XR\u662f\u7f8e\u56fd\u601d\u79d1\uff08Cisco\uff09\u516c\u53f8\u7684\u4e00\u5957\u4e3a\u5176\u7f51\u7edc\u8bbe\u5907\u5f00\u53d1\u7684\u64cd\u4f5c\u7cfb\u7edf\u3002\n\nCisco IOS XR\u8f6f\u4ef6\u4e2dSNMP\u7ba1\u7406\u9762\u677f\u5b58\u5728\u8bbf\u95ee\u63a7\u5236\u9519\u8bef\u6f0f\u6d1e\u4e2d\u5b58\u5728\u6f0f\u6d1e\u3002\u8be5\u6f0f\u6d1e\u662f\u7531\u4e8e\u5728\u5c06SNMP\u4e0e\u7ba1\u7406\u5e73\u9762\u4fdd\u62a4\u914d\u5408\u4f7f\u7528\u65f6\uff0cLPTS\u7f16\u7a0b\u4e0d\u6b63\u786e\u9020\u6210\u7684\u3002\u5373\u4f7f\u914d\u7f6e\u4e3a\u62d2\u7edd\u8bbf\u95eeSNMP\u7684\u7ba1\u7406\u5e73\u9762\u4fdd\u62a4\uff0c\u4e5f\u5141\u8bb8\u672a\u7ecf\u8eab\u4efd\u9a8c\u8bc1\u7684\u8fdc\u7a0b\u653b\u51fb\u8005\u5141\u8bb8\u8fde\u63a5\u53d7\u5f71\u54cd\u8bbe\u5907\u7684\u670d\u52a1\u5668\u3002",
  "formalWay": "\u5382\u5546\u5df2\u53d1\u5e03\u4e86\u6f0f\u6d1e\u4fee\u590d\u7a0b\u5e8f\uff0c\u8bf7\u53ca\u65f6\u5173\u6ce8\u66f4\u65b0\uff1a\r\nhttps://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-snmp-7MKrW7Nq",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2021-14807",
  "openTime": "2021-03-07",
  "patchDescription": "Cisco IOS XR\u662f\u7f8e\u56fd\u601d\u79d1\uff08Cisco\uff09\u516c\u53f8\u7684\u4e00\u5957\u4e3a\u5176\u7f51\u7edc\u8bbe\u5907\u5f00\u53d1\u7684\u64cd\u4f5c\u7cfb\u7edf\u3002\r\n\r\nCisco IOS XR\u8f6f\u4ef6\u4e2dSNMP\u7ba1\u7406\u9762\u677f\u5b58\u5728\u8bbf\u95ee\u63a7\u5236\u9519\u8bef\u6f0f\u6d1e\u4e2d\u5b58\u5728\u6f0f\u6d1e\u3002\u8be5\u6f0f\u6d1e\u662f\u7531\u4e8e\u5728\u5c06SNMP\u4e0e\u7ba1\u7406\u5e73\u9762\u4fdd\u62a4\u914d\u5408\u4f7f\u7528\u65f6\uff0cLPTS\u7f16\u7a0b\u4e0d\u6b63\u786e\u9020\u6210\u7684\u3002\u5373\u4f7f\u914d\u7f6e\u4e3a\u62d2\u7edd\u8bbf\u95eeSNMP\u7684\u7ba1\u7406\u5e73\u9762\u4fdd\u62a4\uff0c\u4e5f\u5141\u8bb8\u672a\u7ecf\u8eab\u4efd\u9a8c\u8bc1\u7684\u8fdc\u7a0b\u653b\u51fb\u8005\u5141\u8bb8\u8fde\u63a5\u53d7\u5f71\u54cd\u8bbe\u5907\u7684\u670d\u52a1\u5668\u3002\u76ee\u524d\uff0c\u4f9b\u5e94\u5546\u53d1\u5e03\u4e86\u5b89\u5168\u516c\u544a\u53ca\u76f8\u5173\u8865\u4e01\u4fe1\u606f\uff0c\u4fee\u590d\u4e86\u6b64\u6f0f\u6d1e\u3002",
  "patchName": "Cisco IOS XR\u8bbf\u95ee\u63a7\u5236\u9519\u8bef\u6f0f\u6d1e\uff08CNVD-2021-14807\uff09\u7684\u8865\u4e01",
  "products": {
    "product": "Cisco IOS XR"
  },
  "referenceLink": "https://vigilance.fr/vulnerability/Cisco-IOS-XR-privilege-escalation-via-SNMP-ACL-Bypass-34478",
  "serverity": "\u4e2d",
  "submitTime": "2021-02-05",
  "title": "Cisco IOS XR\u8bbf\u95ee\u63a7\u5236\u9519\u8bef\u6f0f\u6d1e\uff08CNVD-2021-14807\uff09"
}

CVE-2021-1243 (GCVE-0-2021-1243)

Vulnerability from cvelistv5 – Published: 2021-02-04 16:35 – Updated: 2024-11-08 23:53

Title

Cisco IOS XR Software SNMP Management Plane Protection ACL Bypass Vulnerability

Summary

A vulnerability in the Local Packet Transport Services (LPTS) programming of the SNMP with the management plane protection feature of Cisco IOS XR Software could allow an unauthenticated, remote attacker to allow connections despite the management plane protection that is configured to deny access to the SNMP server of an affected device. This vulnerability is due to incorrect LPTS programming when using SNMP with management plane protection. An attacker could exploit this vulnerability by connecting to an affected device using SNMP. A successful exploit could allow the attacker to connect to the device on the configured SNMP ports. Valid credentials are required to execute any of the SNMP requests.

Severity

5.3 (Medium)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2024-11-08 20:04 UTC

CWE

CWE-284

Assigner

cisco mitre root

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

2021-02-03 00:00

Show details on NVD website

JSON

To clipboard

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        "providerMetadata": {
          "dateUpdated": "2024-08-03T16:02:56.218Z",
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          }
        ],
        "title": "CVE Program Container"
      },
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        "metrics": [
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                "id": "CVE-2021-1243",
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                ],
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        },
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      "metrics": [
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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.

Detection rules are retrieved from Rulezet.

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.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.