Vulnerability-Lookup

CNVD-2021-49775

Vulnerability from cnvd - Published: 2021-07-12

Title

MikroTik RouterOS内存破坏漏洞（CNVD-2021-49775）

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。 MikroTik RouterOS在/nova/bin/bfd进程中存在内存破坏漏洞。经过身份验证的远程攻击者可导致拒绝服务（空指针取消引用）。

Severity

中

Formal description

目前没有详细解决方案提供： https://mikrotik.com/download/changelogs/stable-release-tree

Reference

https://nvd.nist.gov/vuln/detail/CVE-2020-20220

Impacted products

Name
MicroTik RouterOS <6.47

Show details on source website

JSON

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    "cve": {
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  "formalWay": "\u76ee\u524d\u6ca1\u6709\u8be6\u7ec6\u89e3\u51b3\u65b9\u6848\u63d0\u4f9b\uff1a\r\nhttps://mikrotik.com/download/changelogs/stable-release-tree",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2021-49775",
  "openTime": "2021-07-12",
  "products": {
    "product": "MicroTik RouterOS \u003c6.47"
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2020-20220",
  "serverity": "\u4e2d",
  "submitTime": "2021-05-17",
  "title": "MikroTik RouterOS\u5185\u5b58\u7834\u574f\u6f0f\u6d1e\uff08CNVD-2021-49775\uff09"
}

CVE-2020-20220 (GCVE-0-2020-20220)

Vulnerability from cvelistv5 – Published: 2021-05-18 19:09 – Updated: 2024-08-04 14:15

Summary

Mikrotik RouterOs prior to stable 6.47 suffers from a memory corruption vulnerability in the /nova/bin/bfd process. An authenticated remote attacker can cause a Denial of Service (NULL pointer dereference).

Severity

No CVSS data available.

CWE

Assigner

mitre mitre root

References

3 references

URL	Tags
https://mikrotik.com/	x_refsource_MISC
http://seclists.org/fulldisclosure/2021/May/23	mailing-listx_refsource_FULLDISC
http://packetstormsecurity.com/files/162533/Mikro…	x_refsource_MISC

Show details on NVD website

JSON

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          },
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            "tags": [
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          },
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            "url": "http://packetstormsecurity.com/files/162533/MikroTik-RouterOS-Memory-Corruption.html"
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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.