Vulnerability-Lookup

CNVD-2021-37530

Vulnerability from cnvd - Published: 2021-05-27

Title

libyang堆栈溢出漏洞

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 1.0.225版本及之前版本存在安全漏洞，该漏洞源于堆栈溢出可能会导致通过函数lyxml parse mem()拒绝服务。lyxml_parse_elem函数将被递归调用，这将消耗堆栈空间并导致崩溃。攻击者可利用该漏洞导致拒绝服务。

Severity

中

Patch Name

libyang堆栈溢出漏洞的补丁

Patch Description

Formal description

厂商已发布了漏洞修复程序，请及时关注更新：https://github.com/CESNET/libyang/issues/1453

Reference

https://nvd.nist.gov/vuln/detail/CVE-2021-28903

Impacted products

Name
libyang libyang <=1.0.225

Show details on source website

JSON

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{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2021-28903",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2021-28903"
    }
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  "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 1.0.225\u7248\u672c\u53ca\u4e4b\u524d\u7248\u672c\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u5806\u6808\u6ea2\u51fa\u53ef\u80fd\u4f1a\u5bfc\u81f4\u901a\u8fc7\u51fd\u6570lyxml parse mem()\u62d2\u7edd\u670d\u52a1\u3002lyxml_parse_elem\u51fd\u6570\u5c06\u88ab\u9012\u5f52\u8c03\u7528\uff0c\u8fd9\u5c06\u6d88\u8017\u5806\u6808\u7a7a\u95f4\u5e76\u5bfc\u81f4\u5d29\u6e83\u3002\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u5bfc\u81f4\u62d2\u7edd\u670d\u52a1\u3002",
  "formalWay": "\u5382\u5546\u5df2\u53d1\u5e03\u4e86\u6f0f\u6d1e\u4fee\u590d\u7a0b\u5e8f\uff0c\u8bf7\u53ca\u65f6\u5173\u6ce8\u66f4\u65b0\uff1ahttps://github.com/CESNET/libyang/issues/1453",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2021-37530",
  "openTime": "2021-05-27",
  "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 1.0.225\u7248\u672c\u53ca\u4e4b\u524d\u7248\u672c\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u5806\u6808\u6ea2\u51fa\u53ef\u80fd\u4f1a\u5bfc\u81f4\u901a\u8fc7\u51fd\u6570lyxml parse mem()\u62d2\u7edd\u670d\u52a1\u3002lyxml_parse_elem\u51fd\u6570\u5c06\u88ab\u9012\u5f52\u8c03\u7528\uff0c\u8fd9\u5c06\u6d88\u8017\u5806\u6808\u7a7a\u95f4\u5e76\u5bfc\u81f4\u5d29\u6e83\u3002\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\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": "libyang\u5806\u6808\u6ea2\u51fa\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": "libyang libyang \u003c=1.0.225"
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2021-28903",
  "serverity": "\u4e2d",
  "submitTime": "2021-05-21",
  "title": "libyang\u5806\u6808\u6ea2\u51fa\u6f0f\u6d1e"
}

CVE-2021-28903 (GCVE-0-2021-28903)

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

Summary

A stack overflow in libyang <= v1.0.225 can cause a denial of service through function lyxml_parse_mem(). lyxml_parse_elem() function will be called recursively, which will consume stack space and lead to crash.

Severity

No CVSS data available.

CWE

Assigner

mitre mitre root

References

2 references

URL	Tags
https://github.com/CESNET/libyang/issues/1453	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

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.