cnvd - cnvd-2021-07320

cnvd-2021-07320

Vulnerability from cnvd

Title: Mozilla Firefox资源管理错误漏洞（CNVD-2021-07320）

Description:

Mozilla Firefox和Mozilla Firefox ESR都是美国Mozilla基金会的产品。Mozilla Firefox是一款开源Web浏览器。Mozilla Firefox ESR是Firefox(Web浏览器)的一个延长支持版本。

FireFox产品存在资源管理错误漏洞，该漏洞源于使用基于HTTPS的DNS时，它会故意从响应中过滤RFC1918和相关的IP范围，因为这些来自DoH解析器是无意义的。但是，当通过IPv6映射IPv4地址时，这些地址被错误地允许通过，从而导致潜在的DNS重新绑定攻击。目前没有详细的漏洞细节提供。

Severity: 中

Patch Name: Mozilla Firefox资源管理错误漏洞（CNVD-2021-07320）的补丁

Patch Description:

Mozilla Firefox和Mozilla Firefox ESR都是美国Mozilla基金会的产品。Mozilla Firefox是一款开源Web浏览器。Mozilla Firefox ESR是Firefox(Web浏览器)的一个延长支持版本。

FireFox产品存在资源管理错误漏洞，该漏洞源于使用基于HTTPS的DNS时，它会故意从响应中过滤RFC1918和相关的IP范围，因为这些来自DoH解析器是无意义的。但是，当通过IPv6映射IPv4地址时，这些地址被错误地允许通过，从而导致潜在的DNS重新绑定攻击。目前没有详细的漏洞细节提供。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://www.mozilla.org/en-US/security/advisories/mfsa2020-51/

Reference: https://nvd.nist.gov/vuln/detail/CVE-2020-26961

Impacted products

Name
['Mozilla Firefox <83', 'Mozilla Firefox ESR <78.5', 'Mozilla Thunderbird <78.5']

Show details on source website

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{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2020-26961",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2020-26961"
    }
  },
  "description": "Mozilla Firefox\u548cMozilla Firefox ESR\u90fd\u662f\u7f8e\u56fdMozilla\u57fa\u91d1\u4f1a\u7684\u4ea7\u54c1\u3002Mozilla Firefox\u662f\u4e00\u6b3e\u5f00\u6e90Web\u6d4f\u89c8\u5668\u3002Mozilla Firefox ESR\u662fFirefox(Web\u6d4f\u89c8\u5668)\u7684\u4e00\u4e2a\u5ef6\u957f\u652f\u6301\u7248\u672c\u3002\n\nFireFox\u4ea7\u54c1\u5b58\u5728\u8d44\u6e90\u7ba1\u7406\u9519\u8bef\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u4f7f\u7528\u57fa\u4e8eHTTPS\u7684DNS\u65f6\uff0c\u5b83\u4f1a\u6545\u610f\u4ece\u54cd\u5e94\u4e2d\u8fc7\u6ee4RFC1918\u548c\u76f8\u5173\u7684IP\u8303\u56f4\uff0c\u56e0\u4e3a\u8fd9\u4e9b\u6765\u81eaDoH\u89e3\u6790\u5668\u662f\u65e0\u610f\u4e49\u7684\u3002\u4f46\u662f\uff0c\u5f53\u901a\u8fc7IPv6\u6620\u5c04IPv4\u5730\u5740\u65f6\uff0c\u8fd9\u4e9b\u5730\u5740\u88ab\u9519\u8bef\u5730\u5141\u8bb8\u901a\u8fc7\uff0c\u4ece\u800c\u5bfc\u81f4\u6f5c\u5728\u7684DNS\u91cd\u65b0\u7ed1\u5b9a\u653b\u51fb\u3002\u76ee\u524d\u6ca1\u6709\u8be6\u7ec6\u7684\u6f0f\u6d1e\u7ec6\u8282\u63d0\u4f9b\u3002",
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  "number": "CNVD-2021-07320",
  "openTime": "2021-01-29",
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  "patchName": "Mozilla Firefox\u8d44\u6e90\u7ba1\u7406\u9519\u8bef\u6f0f\u6d1e\uff08CNVD-2021-07320\uff09\u7684\u8865\u4e01",
  "products": {
    "product": [
      "Mozilla Firefox \u003c83",
      "Mozilla Firefox ESR \u003c78.5",
      "Mozilla Thunderbird \u003c78.5"
    ]
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2020-26961",
  "serverity": "\u4e2d",
  "submitTime": "2020-11-24",
  "title": "Mozilla Firefox\u8d44\u6e90\u7ba1\u7406\u9519\u8bef\u6f0f\u6d1e\uff08CNVD-2021-07320\uff09"
}

CVE-2020-26961 (GCVE-0-2020-26961)

Vulnerability from cvelistv5

Published

2020-12-09 00:23

Modified

2024-08-04 16:03

Severity ?

CWE

DoH did not filter IPv4 mapped IP Addresses

Summary

When DNS over HTTPS is in use, it intentionally filters RFC1918 and related IP ranges from the responses as these do not make sense coming from a DoH resolver. However when an IPv4 address was mapped through IPv6, these addresses were erroneously let through, leading to a potential DNS Rebinding attack. This vulnerability affects Firefox < 83, Firefox ESR < 78.5, and Thunderbird < 78.5.

References

▼	URL	Tags
	https://bugzilla.mozilla.org/show_bug.cgi?id=1672528	x_refsource_MISC
	https://www.mozilla.org/security/advisories/mfsa2020-50/	x_refsource_CONFIRM
	https://www.mozilla.org/security/advisories/mfsa2020-52/	x_refsource_CONFIRM
	https://www.mozilla.org/security/advisories/mfsa2020-51/	x_refsource_CONFIRM

Impacted products

Vendor

Product

Version

▼

Mozilla

Firefox

Version: < 83

	Mozilla	Firefox ESR	Version: < 78.5
	Mozilla	Thunderbird	Version: < 78.5

Show details on NVD website

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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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