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CVE-2020-26950

Quick assessment

Affected
Mozilla Firefox
Exploitation
High exploitation probability; assess promptly
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 存在资源管理错误漏洞，攻击者可利用该漏洞通过Firefox的MCallGetProperty强制使用释放的内存区域，以触发拒绝服务，并可能运行代码。

AI Predicted 8.8 Difficulty: Moderate EPSS 42.33% · P99

Public Exploits 1

Metasploit · 1 firefox_jit_use_after_free.rb [exploit]

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution
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I. Basic Information for CVE-2020-26950

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
In certain circumstances, the MCallGetProperty opcode can be emitted with unmet assumptions resulting in an exploitable use-after-free condition. This vulnerability affects Firefox < 82.0.3, Firefox ESR < 78.4.1, and Thunderbird < 78.4.2.
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 资源管理错误漏洞
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 存在资源管理错误漏洞，攻击者可利用该漏洞通过Firefox的MCallGetProperty强制使用释放的内存区域，以触发拒绝服务，并可能运行代码。
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 < 82.0.3 -
Mozilla Firefox ESR < 78.4.1 -
Mozilla Thunderbird < 78.4.2 -

II. Public POCs for CVE-2020-26950

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III. Intelligence Information for CVE-2020-26950

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Vendor Advisories for CVE-2020-26950 (2)

Exploits & Public PoCs for CVE-2020-26950 (1)

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

CVE-2020-26961 Mozilla Firefox 安全漏洞
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-2020-26951 Mozilla Firefox 跨站脚本漏洞
CVE-2020-26960 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

IV. Related Vulnerabilities

Same product: Firefox
Same vendor: Mozilla

V. Comments for CVE-2020-26950

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