cnvd - cnvd-2020-58044

cnvd-2020-58044

Vulnerability from cnvd

Title: md4c拒绝服务漏洞（CNVD-2020-58044）

Description:

md4c（Markdown for C）是个人开发者的C语言中的Markdown解析器实现。

md4c 0.4.5中的md4c.c中的md_push_block_bytes存在拒绝服务漏洞。攻击者可通过畸形Markdown文档触发使用未初始化的内存，从而可导致拒绝服务。

Severity: 中

Patch Name: md4c拒绝服务漏洞（CNVD-2020-58044）的补丁

Patch Description:

md4c（Markdown for C）是个人开发者的C语言中的Markdown解析器实现。

md4c 0.4.5中的md4c.c中的md_push_block_bytes存在拒绝服务漏洞。攻击者可通过畸形Markdown文档触发使用未初始化的内存，从而可导致拒绝服务。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/mity/md4c/issues/130

Reference: https://nvd.nist.gov/vuln/detail/CVE-2020-26148

Impacted products

Name
md4c md4c 0.4.5

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2020-26148",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2020-26148"
    }
  },
  "description": "md4c\uff08Markdown for C\uff09\u662f\u4e2a\u4eba\u5f00\u53d1\u8005\u7684C\u8bed\u8a00\u4e2d\u7684Markdown\u89e3\u6790\u5668\u5b9e\u73b0\u3002\n\nmd4c 0.4.5\u4e2d\u7684md4c.c\u4e2d\u7684md_push_block_bytes\u5b58\u5728\u62d2\u7edd\u670d\u52a1\u6f0f\u6d1e\u3002\u653b\u51fb\u8005\u53ef\u901a\u8fc7\u7578\u5f62Markdown\u6587\u6863\u89e6\u53d1\u4f7f\u7528\u672a\u521d\u59cb\u5316\u7684\u5185\u5b58\uff0c\u4ece\u800c\u53ef\u5bfc\u81f4\u62d2\u7edd\u670d\u52a1\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/mity/md4c/issues/130",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2020-58044",
  "openTime": "2020-10-22",
  "patchDescription": "md4c\uff08Markdown for C\uff09\u662f\u4e2a\u4eba\u5f00\u53d1\u8005\u7684C\u8bed\u8a00\u4e2d\u7684Markdown\u89e3\u6790\u5668\u5b9e\u73b0\u3002\r\n\r\nmd4c 0.4.5\u4e2d\u7684md4c.c\u4e2d\u7684md_push_block_bytes\u5b58\u5728\u62d2\u7edd\u670d\u52a1\u6f0f\u6d1e\u3002\u653b\u51fb\u8005\u53ef\u901a\u8fc7\u7578\u5f62Markdown\u6587\u6863\u89e6\u53d1\u4f7f\u7528\u672a\u521d\u59cb\u5316\u7684\u5185\u5b58\uff0c\u4ece\u800c\u53ef\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": "md4c\u62d2\u7edd\u670d\u52a1\u6f0f\u6d1e\uff08CNVD-2020-58044\uff09\u7684\u8865\u4e01",
  "products": {
    "product": "md4c md4c 0.4.5"
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2020-26148",
  "serverity": "\u4e2d",
  "submitTime": "2020-09-30",
  "title": "md4c\u62d2\u7edd\u670d\u52a1\u6f0f\u6d1e\uff08CNVD-2020-58044\uff09"
}

CVE-2020-26148 (GCVE-0-2020-26148)

Vulnerability from cvelistv5

Published

2020-09-29 18:48

Modified

2024-08-04 15:49

Severity ?

CWE

Summary

md_push_block_bytes in md4c.c in md4c 0.4.5 allows attackers to trigger use of uninitialized memory, and cause a denial of service (e.g., assertion failure) via a malformed Markdown document.

References

▼	URL	Tags
	https://github.com/mity/md4c/issues/130	x_refsource_MISC

Impacted products

	Vendor	Product	Version
	n/a	n/a	Version: n/a

Show details on NVD website

JSON

To clipboard

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        "providerMetadata": {
          "dateUpdated": "2024-08-04T15:49:07.155Z",
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            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://github.com/mity/md4c/issues/130"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
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          "product": "n/a",
          "vendor": "n/a",
          "versions": [
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              "status": "affected",
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      ],
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        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "n/a",
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              "type": "text"
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      ],
      "providerMetadata": {
        "dateUpdated": "2020-09-29T18:48:41",
        "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
        "shortName": "mitre"
      },
      "references": [
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/mity/md4c/issues/130"
        }
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      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "cve@mitre.org",
          "ID": "CVE-2020-26148",
          "STATE": "PUBLIC"
        },
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            "vendor_data": [
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                "product": {
                  "product_data": [
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                      "product_name": "n/a",
                      "version": {
                        "version_data": [
                          {
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                          }
                        ]
                      }
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                "vendor_name": "n/a"
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        "data_format": "MITRE",
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        "problemtype": {
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                  "lang": "eng",
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                }
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            {
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  },
  "cveMetadata": {
    "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
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    "state": "PUBLISHED"
  },
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}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
Confirmed: The vulnerability is confirmed from an analyst perspective.
Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
Patched: This vulnerability was successfully patched by the user reporting the sighting.
Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
Not confirmed: The user expresses doubt about the veracity of the vulnerability.
Not patched: This vulnerability was not successfully patched by the user reporting the sighting.

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