Vulnerability-Lookup

CNVD-2020-10246

Vulnerability from cnvd - Published: 2020-02-19

Title

libyang yyparse()内存错误引用漏洞（CNVD-2020-10246）

Description

libyang是一种数据建模语言库。 libyang yyparse()存在内存错误引用漏洞，攻击者可以利用提交特殊的文件请求，诱使用户解析，可进行拒绝服务攻击或执行任意代码。

Severity

中

Patch Name

libyang yyparse()内存错误引用漏洞（CNVD-2020-10246）的补丁

Patch Description

libyang是一种数据建模语言库。 libyang yyparse()存在内存错误引用漏洞，攻击者可以利用提交特殊的文件请求，诱使用户解析，可进行拒绝服务攻击或执行任意代码。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

厂商已发布相关漏洞补丁链接，请关注厂商主页随时更新： https://github.com/CESNET/libyang/commit/88bd6c548ba79bce176cd875e9b56e7e0ef4d8d4

Reference

https://bugzilla.redhat.com/show_bug.cgi?id=1793928

Impacted products

Name
libyang libyang < v1.0-r3

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2019-20397",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2019-20397"
    }
  },
  "description": "libyang\u662f\u4e00\u79cd\u6570\u636e\u5efa\u6a21\u8bed\u8a00\u5e93\u3002\n\nlibyang yyparse()\u5b58\u5728\u5185\u5b58\u9519\u8bef\u5f15\u7528\u6f0f\u6d1e\uff0c\u653b\u51fb\u8005\u53ef\u4ee5\u5229\u7528\u63d0\u4ea4\u7279\u6b8a\u7684\u6587\u4ef6\u8bf7\u6c42\uff0c\u8bf1\u4f7f\u7528\u6237\u89e3\u6790\uff0c\u53ef\u8fdb\u884c\u62d2\u7edd\u670d\u52a1\u653b\u51fb\u6216\u6267\u884c\u4efb\u610f\u4ee3\u7801\u3002",
  "formalWay": "\u5382\u5546\u5df2\u53d1\u5e03\u76f8\u5173\u6f0f\u6d1e\u8865\u4e01\u94fe\u63a5\uff0c\u8bf7\u5173\u6ce8\u5382\u5546\u4e3b\u9875\u968f\u65f6\u66f4\u65b0\uff1a\r\nhttps://github.com/CESNET/libyang/commit/88bd6c548ba79bce176cd875e9b56e7e0ef4d8d4",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2020-10246",
  "openTime": "2020-02-19",
  "patchDescription": "libyang\u662f\u4e00\u79cd\u6570\u636e\u5efa\u6a21\u8bed\u8a00\u5e93\u3002\r\n\r\nlibyang yyparse()\u5b58\u5728\u5185\u5b58\u9519\u8bef\u5f15\u7528\u6f0f\u6d1e\uff0c\u653b\u51fb\u8005\u53ef\u4ee5\u5229\u7528\u63d0\u4ea4\u7279\u6b8a\u7684\u6587\u4ef6\u8bf7\u6c42\uff0c\u8bf1\u4f7f\u7528\u6237\u89e3\u6790\uff0c\u53ef\u8fdb\u884c\u62d2\u7edd\u670d\u52a1\u653b\u51fb\u6216\u6267\u884c\u4efb\u610f\u4ee3\u7801\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 yyparse()\u5185\u5b58\u9519\u8bef\u5f15\u7528\u6f0f\u6d1e\uff08CNVD-2020-10246\uff09\u7684\u8865\u4e01",
  "products": {
    "product": "libyang libyang \u003c v1.0-r3"
  },
  "referenceLink": "https://bugzilla.redhat.com/show_bug.cgi?id=1793928",
  "serverity": "\u4e2d",
  "submitTime": "2020-02-04",
  "title": "libyang yyparse()\u5185\u5b58\u9519\u8bef\u5f15\u7528\u6f0f\u6d1e\uff08CNVD-2020-10246\uff09"
}

CVE-2019-20397 (GCVE-0-2019-20397)

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

Summary

A double-free is present in libyang before v1.0-r1 in the function yyparse() when an organization field is not terminated. Applications that use libyang to parse untrusted input yang files may be vulnerable to this flaw, which would cause a crash or potentially code execution.

Severity

No CVSS data available.

CWE

Assigner

mitre mitre root

References

5 references

URL	Tags
https://github.com/CESNET/libyang/compare/v0.16-r…
https://github.com/CESNET/libyang/issues/739
https://github.com/CESNET/libyang/commit/88bd6c54…
https://bugzilla.redhat.com/show_bug.cgi?id=1793928
https://lists.debian.org/debian-lts-announce/2023…	mailing-list

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-05T02:39:09.895Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://github.com/CESNET/libyang/compare/v0.16-r3...v1.0-r1"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://github.com/CESNET/libyang/issues/739"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://github.com/CESNET/libyang/commit/88bd6c548ba79bce176cd875e9b56e7e0ef4d8d4"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1793928"
          },
          {
            "name": "[debian-lts-announce] 20230919 [SECURITY] [DLA 3572-1] libyang security update",
            "tags": [
              "mailing-list",
              "x_transferred"
            ],
            "url": "https://lists.debian.org/debian-lts-announce/2023/09/msg00019.html"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "A double-free is present in libyang before v1.0-r1 in the function yyparse() when an organization field is not terminated. Applications that use libyang to parse untrusted input yang files may be vulnerable to this flaw, which would cause a crash or potentially code execution."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "n/a",
              "lang": "en",
              "type": "text"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2023-09-19T21:06:24.541Z",
        "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
        "shortName": "mitre"
      },
      "references": [
        {
          "url": "https://github.com/CESNET/libyang/compare/v0.16-r3...v1.0-r1"
        },
        {
          "url": "https://github.com/CESNET/libyang/issues/739"
        },
        {
          "url": "https://github.com/CESNET/libyang/commit/88bd6c548ba79bce176cd875e9b56e7e0ef4d8d4"
        },
        {
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1793928"
        },
        {
          "name": "[debian-lts-announce] 20230919 [SECURITY] [DLA 3572-1] libyang security update",
          "tags": [
            "mailing-list"
          ],
          "url": "https://lists.debian.org/debian-lts-announce/2023/09/msg00019.html"
        }
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
    "assignerShortName": "mitre",
    "cveId": "CVE-2019-20397",
    "datePublished": "2020-01-22T00:00:00.000Z",
    "dateReserved": "2020-01-22T00:00:00.000Z",
    "dateUpdated": "2024-08-05T02:39:09.895Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

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.

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Action not permitted

CNVD-2020-10246

CVE-2019-20397 (GCVE-0-2019-20397)

Tags

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Related by attack behaviour