Vulnerability-Lookup

CNVD-2020-10243

Vulnerability from cnvd - Published: 2020-02-19

Title

libyang缓冲区溢出漏洞（CNVD-2020-10243）

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-r3之前版本中的‘resolve_feature_value()’函数存在缓冲区溢出漏洞。攻击者可利用该漏洞造成应用程序崩溃。

Severity

中

Patch Name

libyang缓冲区溢出漏洞（CNVD-2020-10243）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-r3之前版本中的‘resolve_feature_value()’函数存在缓冲区溢出漏洞。攻击者可利用该漏洞造成应用程序崩溃。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/commit/bdb596ddc07596fa212f231135b87d0b9178f6f8

Reference

https://github.com/CESNET/libyang/commit/bdb596ddc07596fa212f231135b87d0b9178f6f8

Impacted products

Name
libyang libyang <v1.0-r3

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2019-20391",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2019-20391"
    }
  },
  "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-r3\u4e4b\u524d\u7248\u672c\u4e2d\u7684\u2018resolve_feature_value()\u2019\u51fd\u6570\u5b58\u5728\u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e\u3002\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u9020\u6210\u5e94\u7528\u7a0b\u5e8f\u5d29\u6e83\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://github.com/CESNET/libyang/commit/bdb596ddc07596fa212f231135b87d0b9178f6f8",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2020-10243",
  "openTime": "2020-02-19",
  "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-r3\u4e4b\u524d\u7248\u672c\u4e2d\u7684\u2018resolve_feature_value()\u2019\u51fd\u6570\u5b58\u5728\u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e\u3002\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u9020\u6210\u5e94\u7528\u7a0b\u5e8f\u5d29\u6e83\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\u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e\uff08CNVD-2020-10243\uff09\u7684\u8865\u4e01",
  "products": {
    "product": "libyang libyang \u003cv1.0-r3"
  },
  "referenceLink": "https://github.com/CESNET/libyang/commit/bdb596ddc07596fa212f231135b87d0b9178f6f8",
  "serverity": "\u4e2d",
  "submitTime": "2020-02-18",
  "title": "libyang\u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e\uff08CNVD-2020-10243\uff09"
}

CVE-2019-20391 (GCVE-0-2019-20391)

Vulnerability from cvelistv5 – Published: 2020-01-22 00:00 – Updated: 2024-08-05 02:39

Summary

An invalid memory access flaw is present in libyang before v1.0-r3 in the function resolve_feature_value() when an if-feature statement is used inside a bit. Applications that use libyang to parse untrusted input yang files may crash.

Severity

No CVSS data available.

CWE

Assigner

mitre mitre root

References

5 references

URL	Tags
https://github.com/CESNET/libyang/commit/bdb596dd…
https://github.com/CESNET/libyang/issues/772
https://bugzilla.redhat.com/show_bug.cgi?id=1793934
https://github.com/CESNET/libyang/compare/v1.0-r2…
https://lists.debian.org/debian-lts-announce/2023…	mailing-list

Show details on NVD website

JSON

To clipboard

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  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-05T02:39:09.273Z",
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            "tags": [
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            "url": "https://github.com/CESNET/libyang/commit/bdb596ddc07596fa212f231135b87d0b9178f6f8"
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            "url": "https://github.com/CESNET/libyang/issues/772"
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            "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1793934"
          },
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            ],
            "url": "https://github.com/CESNET/libyang/compare/v1.0-r2...v1.0-r3"
          },
          {
            "name": "[debian-lts-announce] 20230919 [SECURITY] [DLA 3572-1] libyang security update",
            "tags": [
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            "url": "https://lists.debian.org/debian-lts-announce/2023/09/msg00019.html"
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    ],
    "cna": {
      "affected": [
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          "product": "n/a",
          "vendor": "n/a",
          "versions": [
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            }
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          "lang": "en",
          "value": "An invalid memory access flaw is present in libyang before v1.0-r3 in the function resolve_feature_value() when an if-feature statement is used inside a bit. Applications that use libyang to parse untrusted input yang files may crash."
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      "problemTypes": [
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  "cveMetadata": {
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    "datePublished": "2020-01-22T00:00:00.000Z",
    "dateReserved": "2020-01-22T00:00:00.000Z",
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    "state": "PUBLISHED"
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  "dataType": "CVE_RECORD",
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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.