Vulnerability-Lookup

CNVD-2021-49782

Vulnerability from cnvd - Published: 2021-07-12

Title

Mikrotik RouterOs内存破坏漏洞（CNVD-2021-49782）

Description

MikroTik RouterOS是拉脱维亚MikroTik公司的一套基于Linux开发的路由器操作系统。该系统可部署在PC中，使其提供路由器功能。 MikroTik RouterOS在/ram/pckg/wireless/nova/bin/wireless进程中存在内存破坏漏洞。经过身份验证的远程攻击者可利用漏洞通过特制的数据包导致拒绝服务。

Severity

中

Patch Name

Mikrotik RouterOs内存破坏漏洞（CNVD-2021-49782）的补丁

Patch Description

Formal description

目前厂商已发布升级补丁以修复漏洞，补丁获取链接： https://mikrotik.com/download/changelogs/stable-release-tree

Reference

https://nvd.nist.gov/vuln/detail/CVE-2020-20265

Impacted products

Name
MicroTik RouterOS <6.47

Show details on source website

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{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2020-20265",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2020-20265"
    }
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  "description": "MikroTik RouterOS\u662f\u62c9\u8131\u7ef4\u4e9aMikroTik\u516c\u53f8\u7684\u4e00\u5957\u57fa\u4e8eLinux\u5f00\u53d1\u7684\u8def\u7531\u5668\u64cd\u4f5c\u7cfb\u7edf\u3002\u8be5\u7cfb\u7edf\u53ef\u90e8\u7f72\u5728PC\u4e2d\uff0c\u4f7f\u5176\u63d0\u4f9b\u8def\u7531\u5668\u529f\u80fd\u3002\n\nMikroTik RouterOS\u5728/ram/pckg/wireless/nova/bin/wireless\u8fdb\u7a0b\u4e2d\u5b58\u5728\u5185\u5b58\u7834\u574f\u6f0f\u6d1e\u3002\u7ecf\u8fc7\u8eab\u4efd\u9a8c\u8bc1\u7684\u8fdc\u7a0b\u653b\u51fb\u8005\u53ef\u5229\u7528\u6f0f\u6d1e\u901a\u8fc7\u7279\u5236\u7684\u6570\u636e\u5305\u5bfc\u81f4\u62d2\u7edd\u670d\u52a1\u3002",
  "formalWay": "\u76ee\u524d\u5382\u5546\u5df2\u53d1\u5e03\u5347\u7ea7\u8865\u4e01\u4ee5\u4fee\u590d\u6f0f\u6d1e\uff0c\u8865\u4e01\u83b7\u53d6\u94fe\u63a5\uff1a\r\nhttps://mikrotik.com/download/changelogs/stable-release-tree",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2021-49782",
  "openTime": "2021-07-12",
  "patchDescription": "MikroTik RouterOS\u662f\u62c9\u8131\u7ef4\u4e9aMikroTik\u516c\u53f8\u7684\u4e00\u5957\u57fa\u4e8eLinux\u5f00\u53d1\u7684\u8def\u7531\u5668\u64cd\u4f5c\u7cfb\u7edf\u3002\u8be5\u7cfb\u7edf\u53ef\u90e8\u7f72\u5728PC\u4e2d\uff0c\u4f7f\u5176\u63d0\u4f9b\u8def\u7531\u5668\u529f\u80fd\u3002\r\n\r\nMikroTik RouterOS\u5728/ram/pckg/wireless/nova/bin/wireless\u8fdb\u7a0b\u4e2d\u5b58\u5728\u5185\u5b58\u7834\u574f\u6f0f\u6d1e\u3002\u7ecf\u8fc7\u8eab\u4efd\u9a8c\u8bc1\u7684\u8fdc\u7a0b\u653b\u51fb\u8005\u53ef\u5229\u7528\u6f0f\u6d1e\u901a\u8fc7\u7279\u5236\u7684\u6570\u636e\u5305\u5bfc\u81f4\u62d2\u7edd\u670d\u52a1\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": "Mikrotik RouterOs\u5185\u5b58\u7834\u574f\u6f0f\u6d1e\uff08CNVD-2021-49782\uff09\u7684\u8865\u4e01",
  "products": {
    "product": "MicroTik RouterOS \u003c6.47"
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2020-20265",
  "serverity": "\u4e2d",
  "submitTime": "2021-05-12",
  "title": "Mikrotik RouterOs\u5185\u5b58\u7834\u574f\u6f0f\u6d1e\uff08CNVD-2021-49782\uff09"
}

CVE-2020-20265 (GCVE-0-2020-20265)

Vulnerability from cvelistv5 – Published: 2021-05-11 14:25 – Updated: 2024-08-04 14:15

Summary

Mikrotik RouterOs before 6.47 (stable tree) suffers from a memory corruption vulnerability in the /ram/pckg/wireless/nova/bin/wireless process. An authenticated remote attacker can cause a Denial of Service due via a crafted packet.

Severity

No CVSS data available.

CWE

Assigner

mitre mitre root

References

2 references

URL	Tags
http://seclists.org/fulldisclosure/2021/May/12	x_refsource_MISC
https://seclists.org/fulldisclosure/2021/May/11	mailing-listx_refsource_FULLDISC

Show details on NVD website

JSON

To clipboard

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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.