CVE-2020-26978
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。 Mozilla Firefox 84之前版本中存在信息泄露漏洞，该漏洞源于基于流技术，攻击者可获得本地用户所在内网的其他主机信息。
Possible ATT&CK Techniques 2 AI
T1046 · Network Service Discovery T1210 · Exploitation of Remote Services
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I. Basic Information for CVE-2020-26978
Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
Using techniques that built on the slipstream research, a malicious webpage could have exposed both an internal network's hosts as well as services running on the user's local machine. This vulnerability affects Firefox < 84, Thunderbird < 78.6, and Firefox ESR < 78.6.
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 信息泄露漏洞
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。 Mozilla Firefox 84之前版本中存在信息泄露漏洞，该漏洞源于基于流技术，攻击者可获得本地用户所在内网的其他主机信息。
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 | unspecified ~ 84 | - |
|
| Mozilla | Thunderbird | unspecified ~ 78.6 | - |
|
| Mozilla | Firefox ESR | unspecified ~ 78.6 | - |
|
II. Public POCs for CVE-2020-26978
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2020-26978 (4)
-
https://www.mozilla.org/security/advisories/mfsa2020-54/ x_refsource_MISC
-
https://www.mozilla.org/security/advisories/mfsa2020-55/ x_refsource_MISC
-
https://www.mozilla.org/security/advisories/mfsa2020-56/ x_refsource_MISC
-
https://bugzilla.mozilla.org/show_bug.cgi?id=1677047 x_refsource_MISC
Same Patch Batch · Mozilla · 2021-01-07 · 13 CVEs total
| CVE-2020-26971 | Mozilla Firefox 缓冲区错误漏洞 | |
| CVE-2020-26972 | Mozilla Firefox 资源管理错误漏洞 | |
| CVE-2020-26973 | Mozilla Firefox 安全漏洞 | |
| CVE-2020-26974 | Mozilla Firefox 缓冲区错误漏洞 | |
| CVE-2020-26975 | Mozilla Firefox 安全漏洞 | |
| CVE-2020-26976 | Mozilla Firefox 安全漏洞 | |
| CVE-2020-26977 | Mozilla Firefox 安全漏洞 | |
| CVE-2020-26979 | Mozilla Firefox 输入验证错误漏洞 | |
| CVE-2020-35111 | Mozilla Firefox 安全漏洞 | |
| CVE-2020-35112 | Mozilla Firefox 安全漏洞 | |
| CVE-2020-35113 | Mozilla Firefox 缓冲区错误漏洞 | |
| CVE-2020-35114 | Mozilla Firefox 缓冲区错误漏洞 |
IV. Related Vulnerabilities
Same product: Firefox
-
CVE-2026-74989
Internally found bugs fixed in Firefox 154 -
CVE-2026-74988
Internally found bugs fixed in Firefox ESR 153.1 and Firefox -
CVE-2026-74984
Race condition in the JavaScript Engine component -
CVE-2026-74985
Privilege escalation in the Enterprise Policies component -
CVE-2026-74982
Denial-of-service in the Widget component
Same vendor: Mozilla
-
CVE-2026-74989
Internally found bugs fixed in Firefox 154 -
CVE-2026-74988
Internally found bugs fixed in Firefox ESR 153.1 and Firefox -
CVE-2026-74984
Race condition in the JavaScript Engine component -
CVE-2026-74985
Privilege escalation in the Enterprise Policies component -
CVE-2026-74982
Denial-of-service in the Widget component
V. Comments for CVE-2020-26978
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