Vulnerability-Lookup

CNVD-2021-37201

Vulnerability from cnvd - Published: 2021-05-26

Title

libyang存在未明漏洞（CNVD-2021-37201）

Description

libyang是一款使用C语言编写的YANG数据建模语言解析器和工具包。 libyang v1.0.225版本及之前版本存在安全漏洞，该漏洞源于ext_get_plugin()函数中，未检查revision的值是否为NULL。目前没有详细漏洞细节提供。

Severity

中

Patch Name

libyang存在未明漏洞（CNVD-2021-37201）的补丁

Patch Description

libyang是一款使用C语言编写的YANG数据建模语言解析器和工具包。 libyang v1.0.225版本及之前版本存在安全漏洞，该漏洞源于ext_get_plugin()函数中，未检查revision的值是否为NULL。目前没有详细漏洞细节提供。目前，供应商发布了安全公告及相关补丁信息，修复了此漏洞。

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://github.com/CESNET/libyang/issues/1451

Reference

https://nvd.nist.gov/vuln/detail/CVE-2021-28904

Impacted products

Name
libyang libyang <=v1.0.225

Show details on source website

JSON

To clipboard

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  "cves": {
    "cve": {
      "cveNumber": "CVE-2021-28904",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2021-28904"
    }
  },
  "description": "libyang\u662f\u4e00\u6b3e\u4f7f\u7528C\u8bed\u8a00\u7f16\u5199\u7684YANG\u6570\u636e\u5efa\u6a21\u8bed\u8a00\u89e3\u6790\u5668\u548c\u5de5\u5177\u5305\u3002\n\nlibyang v1.0.225\u7248\u672c\u53ca\u4e4b\u524d\u7248\u672c\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8eext_get_plugin()\u51fd\u6570\u4e2d\uff0c\u672a\u68c0\u67e5revision\u7684\u503c\u662f\u5426\u4e3aNULL\u3002\u76ee\u524d\u6ca1\u6709\u8be6\u7ec6\u6f0f\u6d1e\u7ec6\u8282\u63d0\u4f9b\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\uff1ahttps://github.com/CESNET/libyang/issues/1451",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2021-37201",
  "openTime": "2021-05-26",
  "patchDescription": "libyang\u662f\u4e00\u6b3e\u4f7f\u7528C\u8bed\u8a00\u7f16\u5199\u7684YANG\u6570\u636e\u5efa\u6a21\u8bed\u8a00\u89e3\u6790\u5668\u548c\u5de5\u5177\u5305\u3002\r\n\r\nlibyang v1.0.225\u7248\u672c\u53ca\u4e4b\u524d\u7248\u672c\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8eext_get_plugin()\u51fd\u6570\u4e2d\uff0c\u672a\u68c0\u67e5revision\u7684\u503c\u662f\u5426\u4e3aNULL\u3002\u76ee\u524d\u6ca1\u6709\u8be6\u7ec6\u6f0f\u6d1e\u7ec6\u8282\u63d0\u4f9b\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": "libyang\u5b58\u5728\u672a\u660e\u6f0f\u6d1e\uff08CNVD-2021-37201\uff09\u7684\u8865\u4e01",
  "products": {
    "product": "libyang libyang \u003c=v1.0.225"
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2021-28904",
  "serverity": "\u4e2d",
  "submitTime": "2021-05-24",
  "title": "libyang\u5b58\u5728\u672a\u660e\u6f0f\u6d1e\uff08CNVD-2021-37201\uff09"
}

CVE-2021-28904 (GCVE-0-2021-28904)

Vulnerability from cvelistv5 – Published: 2021-05-20 18:36 – Updated: 2024-08-03 21:55

Summary

In function ext_get_plugin() in libyang <= v1.0.225, it doesn't check whether the value of revision is NULL. If revision is NULL, the operation of strcmp(revision, ext_plugins[u].revision) will lead to a crash.

Severity

No CVSS data available.

CWE

Assigner

mitre mitre root

References

2 references

URL	Tags
https://github.com/CESNET/libyang/issues/1451	x_refsource_CONFIRM
https://security.gentoo.org/glsa/202107-54	vendor-advisoryx_refsource_GENTOO

Date Public

2021-03-08 00:00

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

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