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CVE-2020-26961

Quick assessment

Affected
Mozilla Firefox
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Mozilla Firefox是美国Mozilla基金会的一款开源Web浏览器。 FireFox 存在安全漏洞，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解析器是没有意义的。 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。

AI Predicted 6.1 Difficulty: Moderate EPSS 1.15% · P64

Possible ATT&CK Techniques 1 AI

T1565 · Data Manipulation
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I. Basic Information for CVE-2020-26961

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Mozilla Firefox 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Mozilla Firefox是美国Mozilla基金会的一款开源Web浏览器。 FireFox 存在安全漏洞，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解析器是没有意义的。 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。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Mozilla Firefox < 83 -
Mozilla Firefox ESR < 78.5 -
Mozilla Thunderbird < 78.5 -

II. Public POCs for CVE-2020-26961

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III. Intelligence Information for CVE-2020-26961

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Vendor Advisories for CVE-2020-26961 (4)

Same Patch Batch · Mozilla · 2020-12-09 · 21 CVEs total

CVE-2020-26960 Mozilla Firefox 资源管理错误漏洞
CVE-2020-26970 Mozilla Thunderbird 缓冲区错误漏洞
CVE-2020-26969 Mozilla Firefox ESR 缓冲区错误漏洞
CVE-2020-26968 Mozilla Firefox ESR 缓冲区错误漏洞
CVE-2020-26967 Mozilla Firefox 安全漏洞
CVE-2020-26966 Mozilla Firefox 安全漏洞
CVE-2020-26965 Mozilla Firefox 安全漏洞
CVE-2020-26964 Mozilla Firefox for Android 安全漏洞
CVE-2020-26963 Mozilla Firefox 安全漏洞
CVE-2020-26962 Mozilla Firefox 安全漏洞
CVE-2020-26950 Mozilla Firefox 资源管理错误漏洞
CVE-2020-26959 Mozilla Firefox 资源管理错误漏洞
CVE-2020-26958 Mozilla Firefox ESR 跨站脚本漏洞
CVE-2020-26957 Mozilla Firefox for Android 安全漏洞
CVE-2020-26956 多款Mozilla产品跨站脚本漏洞
CVE-2020-26955 Mozilla Firefox 安全漏洞
CVE-2020-26954 Mozilla Firefox 安全漏洞
CVE-2020-26953 Mozilla Firefox 和 Mozilla Thunderbird 安全漏洞
CVE-2020-26952 Mozilla Firefox 缓冲区错误漏洞
CVE-2020-26951 Mozilla Firefox 跨站脚本漏洞

IV. Related Vulnerabilities

Same product: Firefox
Same vendor: Mozilla

V. Comments for CVE-2020-26961

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