Vulnerability-Lookup

CNVD-2020-16656

Vulnerability from cnvd - Published: 2020-03-11

Title

Cisco IOS XR Software中Cisco Discovery协议格式字符串漏洞

Description

Cisco IOS XR Software是美国思科（Cisco）公司的IOS软件系列（包括IOS T、IOS S和IOS XR）中的一套完全模块化、分布式的网络操作系统。 Cisco IOS XR Software中Cisco Discovery协议存在格式字符串漏洞。该漏洞源于程序没有正确验证输入的字符串。攻击者可通过发送恶意的Cisco Discovery Protocol数据包利用该漏洞以管理权限执行任意代码。

Severity

高

Patch Name

Cisco IOS XR Software中Cisco Discovery协议格式字符串漏洞的补丁

Patch Description

Formal description

用户可参考如下供应商提供的安全公告获得补丁信息： https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20200205-iosxr-cdp-rce

Reference

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20200205-iosxr-cdp-rce

Impacted products

Name
['Cisco ASR 9000 Series Aggregation Services Routers', 'Cisco IOS XRv 9000 Router', 'Cisco Carrier Routing System (CRS)', 'Cisco Network Convergence System (NCS) 6000 Series Routers', 'Cisco Network Convergence System (NCS) 5500 Series Routers', 'Cisco Network Convergence System (NCS) 5000 Series Routers', 'Cisco Network Convergence System (NCS) 1000 Series Routers', 'Cisco Network Convergence System (NCS) 560 Series Routers', 'Cisco Network Convergence System (NCS) 540 Series Routers']

Name

['Cisco ASR 9000 Series Aggregation Services Routers', 'Cisco IOS XRv 9000 Router', 'Cisco Carrier Routing System (CRS)', 'Cisco Network Convergence System (NCS) 6000 Series Routers', 'Cisco Network Convergence System (NCS) 5500 Series Routers', 'Cisco Network Convergence System (NCS) 5000 Series Routers', 'Cisco Network Convergence System (NCS) 1000 Series Routers', 'Cisco Network Convergence System (NCS) 560 Series Routers', 'Cisco Network Convergence System (NCS) 540 Series Routers']

Show details on source website

JSON

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  "cves": {
    "cve": {
      "cveNumber": "CVE-2020-3118"
    }
  },
  "description": "Cisco IOS XR Software\u662f\u7f8e\u56fd\u601d\u79d1\uff08Cisco\uff09\u516c\u53f8\u7684IOS\u8f6f\u4ef6\u7cfb\u5217\uff08\u5305\u62ecIOS T\u3001IOS S\u548cIOS XR\uff09\u4e2d\u7684\u4e00\u5957\u5b8c\u5168\u6a21\u5757\u5316\u3001\u5206\u5e03\u5f0f\u7684\u7f51\u7edc\u64cd\u4f5c\u7cfb\u7edf\u3002\n\nCisco IOS XR Software\u4e2dCisco Discovery\u534f\u8bae\u5b58\u5728\u683c\u5f0f\u5b57\u7b26\u4e32\u6f0f\u6d1e\u3002\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u7a0b\u5e8f\u6ca1\u6709\u6b63\u786e\u9a8c\u8bc1\u8f93\u5165\u7684\u5b57\u7b26\u4e32\u3002\u653b\u51fb\u8005\u53ef\u901a\u8fc7\u53d1\u9001\u6076\u610f\u7684Cisco Discovery Protocol\u6570\u636e\u5305\u5229\u7528\u8be5\u6f0f\u6d1e\u4ee5\u7ba1\u7406\u6743\u9650\u6267\u884c\u4efb\u610f\u4ee3\u7801\u3002",
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  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2020-16656",
  "openTime": "2020-03-11",
  "patchDescription": "Cisco IOS XR Software\u662f\u7f8e\u56fd\u601d\u79d1\uff08Cisco\uff09\u516c\u53f8\u7684IOS\u8f6f\u4ef6\u7cfb\u5217\uff08\u5305\u62ecIOS T\u3001IOS S\u548cIOS XR\uff09\u4e2d\u7684\u4e00\u5957\u5b8c\u5168\u6a21\u5757\u5316\u3001\u5206\u5e03\u5f0f\u7684\u7f51\u7edc\u64cd\u4f5c\u7cfb\u7edf\u3002\r\n\r\nCisco IOS XR Software\u4e2dCisco Discovery\u534f\u8bae\u5b58\u5728\u683c\u5f0f\u5b57\u7b26\u4e32\u6f0f\u6d1e\u3002\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u7a0b\u5e8f\u6ca1\u6709\u6b63\u786e\u9a8c\u8bc1\u8f93\u5165\u7684\u5b57\u7b26\u4e32\u3002\u653b\u51fb\u8005\u53ef\u901a\u8fc7\u53d1\u9001\u6076\u610f\u7684Cisco Discovery Protocol\u6570\u636e\u5305\u5229\u7528\u8be5\u6f0f\u6d1e\u4ee5\u7ba1\u7406\u6743\u9650\u6267\u884c\u4efb\u610f\u4ee3\u7801\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",
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  "products": {
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      "Cisco IOS XRv 9000 Router",
      "Cisco Carrier Routing System (CRS)",
      "Cisco Network Convergence System (NCS) 6000 Series Routers",
      "Cisco Network Convergence System (NCS) 5500 Series Routers",
      "Cisco Network Convergence System (NCS) 5000 Series Routers",
      "Cisco Network Convergence System (NCS) 1000 Series Routers",
      "Cisco Network Convergence System (NCS) 560 Series Routers",
      "Cisco Network Convergence System (NCS) 540 Series Routers"
    ]
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  "referenceLink": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20200205-iosxr-cdp-rce",
  "serverity": "\u9ad8",
  "submitTime": "2020-02-06",
  "title": "Cisco IOS XR Software\u4e2dCisco Discovery\u534f\u8bae\u683c\u5f0f\u5b57\u7b26\u4e32\u6f0f\u6d1e"
}

CVE-2020-3118 (GCVE-0-2020-3118)

Vulnerability from cvelistv5 – Published: 2020-02-05 17:40 – Updated: 2025-10-21 23:35

Title

Cisco IOS XR Software Cisco Discovery Protocol Format String Vulnerability

Summary

A vulnerability in the Cisco Discovery Protocol implementation for Cisco IOS XR Software could allow an unauthenticated, adjacent attacker to execute arbitrary code or cause a reload on an affected device. The vulnerability is due to improper validation of string input from certain fields in Cisco Discovery Protocol messages. An attacker could exploit this vulnerability by sending a malicious Cisco Discovery Protocol packet to an affected device. A successful exploit could allow the attacker to cause a stack overflow, which could allow the attacker to execute arbitrary code with administrative privileges on an affected device. Cisco Discovery Protocol is a Layer 2 protocol. To exploit this vulnerability, an attacker must be in the same broadcast domain as the affected device (Layer 2 adjacent).

Severity

8.8 (High)


                        
                          CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

SSVC

Exploitation: active Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2024-11-08 16:12 UTC

CWE

CWE-134

Assigner

cisco CNA under the mitre root

CNA scorecard C 66/100 over 431 records in the last 180 days details

References

3 references

URL	Tags
https://tools.cisco.com/security/center/content/C…	vendor-advisoryx_refsource_CISCO
http://packetstormsecurity.com/files/156203/Cisco…	x_refsource_MISC
https://www.cisa.gov/known-exploited-vulnerabilit…	government-resource

Impacted products

1 product

Vendor	Product	Version
Cisco	Cisco IOS XR Software	Affected: unspecified , < 6.6.3 (custom)

Date Public

2020-02-05 00:00

Show details on NVD website

JSON

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{
  "containers": {
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          "dateUpdated": "2024-08-04T07:24:00.571Z",
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          },
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              "x_refsource_MISC",
              "x_transferred"
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            "url": "http://packetstormsecurity.com/files/156203/Cisco-Discovery-Protocol-CDP-Remote-Device-Takeover.html"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
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                "id": "CVE-2020-3118",
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                  },
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            "other": {
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    ],
    "cna": {
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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.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

Order JSON

How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.

Publication & reservation Sightings KEV catalogs Other timestamps

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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.
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.

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