cnvd - cnvd-2021-94922

CNVD-2021-94922

Vulnerability from cnvd - Published: 2021-12-07

Title

Libav分段错误漏洞

Description

Libav是一款开源音视频处理工具，提供用于转换、操纵及流式传输各种多媒体格式和协议的跨平台工具和库。 Libav 12.3版中的vc1_block.c中的vc1_decode_b_mb_intfr存在分段错误漏洞。攻击者可通过特制文件利用该漏洞导致拒绝服务。

Severity

中

Formal description

厂商尚未提供漏洞修复方案，请关注厂商主页更新： https://libav.org/

Reference

https://nvd.nist.gov/vuln/detail/CVE-2020-18776

Impacted products

Name
Libav Libav 12.3

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2020-18776",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2020-18776"
    }
  },
  "description": "Libav\u662f\u4e00\u6b3e\u5f00\u6e90\u97f3\u89c6\u9891\u5904\u7406\u5de5\u5177\uff0c\u63d0\u4f9b\u7528\u4e8e\u8f6c\u6362\u3001\u64cd\u7eb5\u53ca\u6d41\u5f0f\u4f20\u8f93\u5404\u79cd\u591a\u5a92\u4f53\u683c\u5f0f\u548c\u534f\u8bae\u7684\u8de8\u5e73\u53f0\u5de5\u5177\u548c\u5e93\u3002\n\nLibav 12.3\u7248\u4e2d\u7684vc1_block.c\u4e2d\u7684vc1_decode_b_mb_intfr\u5b58\u5728\u5206\u6bb5\u9519\u8bef\u6f0f\u6d1e\u3002\u653b\u51fb\u8005\u53ef\u901a\u8fc7\u7279\u5236\u6587\u4ef6\u5229\u7528\u8be5\u6f0f\u6d1e\u5bfc\u81f4\u62d2\u7edd\u670d\u52a1\u3002",
  "formalWay": "\u5382\u5546\u5c1a\u672a\u63d0\u4f9b\u6f0f\u6d1e\u4fee\u590d\u65b9\u6848\uff0c\u8bf7\u5173\u6ce8\u5382\u5546\u4e3b\u9875\u66f4\u65b0\uff1a\r\nhttps://libav.org/",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2021-94922",
  "openTime": "2021-12-07",
  "products": {
    "product": "Libav Libav 12.3"
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2020-18776",
  "serverity": "\u4e2d",
  "submitTime": "2021-08-24",
  "title": "Libav\u5206\u6bb5\u9519\u8bef\u6f0f\u6d1e"
}

CVE-2020-18776 (GCVE-0-2020-18776)

Vulnerability from cvelistv5 – Published: 2021-08-23 21:50 – Updated: 2024-08-04 14:08

Summary

In Libav 12.3, there is a segmentation fault in vc1_decode_b_mb_intfr in vc1_block.c that allows an attacker to cause denial-of-service via a crafted file.

Severity ?

No CVSS data available.

CWE

Assigner

mitre

References

URL

Tags

https://bugzilla.libav.org/show_bug.cgi?id=1153

x_refsource_MISC

Show details on NVD website

JSON

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{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-04T14:08:30.665Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://bugzilla.libav.org/show_bug.cgi?id=1153"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
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          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
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        }
      ],
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          "lang": "en",
          "value": "In Libav 12.3, there is a segmentation fault in vc1_decode_b_mb_intfr in vc1_block.c that allows an attacker to cause denial-of-service via a crafted file."
        }
      ],
      "problemTypes": [
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          "descriptions": [
            {
              "description": "n/a",
              "lang": "en",
              "type": "text"
            }
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      ],
      "providerMetadata": {
        "dateUpdated": "2021-08-23T21:50:04",
        "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
        "shortName": "mitre"
      },
      "references": [
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://bugzilla.libav.org/show_bug.cgi?id=1153"
        }
      ],
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "cve@mitre.org",
          "ID": "CVE-2020-18776",
          "STATE": "PUBLIC"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
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                      "version": {
                        "version_data": [
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                            "version_value": "n/a"
                          }
                        ]
                      }
                    }
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                },
                "vendor_name": "n/a"
              }
            ]
          }
        },
        "data_format": "MITRE",
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        "data_version": "4.0",
        "description": {
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        "problemtype": {
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        "references": {
          "reference_data": [
            {
              "name": "https://bugzilla.libav.org/show_bug.cgi?id=1153",
              "refsource": "MISC",
              "url": "https://bugzilla.libav.org/show_bug.cgi?id=1153"
            }
          ]
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
    "assignerShortName": "mitre",
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    "datePublished": "2021-08-23T21:50:04",
    "dateReserved": "2020-08-13T00:00:00",
    "dateUpdated": "2024-08-04T14:08:30.665Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date

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.

Action not permitted

CNVD-2021-94922

CVE-2020-18776 (GCVE-0-2020-18776)

Tags

Sightings

Nomenclature