CVE & CISA-KEV Catalog

CVE-2020-15663

HIGHEPSS 84th pctl
8.8
CVSS v3
NVD

Description

If Firefox is installed to a user-writable directory, the Mozilla Maintenance Service would execute updater.exe from the install location with system privileges. Although the Mozilla Maintenance Service does ensure that updater.exe is signed by Mozilla, the version could have been rolled back to a previous version which would have allowed exploitation of an older bug and arbitrary code execution with System Privileges. *Note: This issue only affected Windows operating systems. Other operating systems are unaffected.*. This vulnerability affects Firefox < 80, Thunderbird < 78.2, Thunderbird < 68.12, Firefox ESR < 68.12, and Firefox ESR < 78.2.

CWE-427

How to fix

Remediation Available
DeveloperEditionWindows application
Affected:80.0Fixed in:80.0Mozilla
Affected:78.0 78.2Fixed in:78.2Mozilla
Mozilla Firefox (en-US)Windows application
Affected:78.0 78.2Fixed in:78.2Mozilla
Affected:80.0Fixed in:80.0Mozilla
Mozilla Firefox ESR (en-US)Windows application
Affected:68.0 68.12Fixed in:68.12Mozilla
Mozilla Thunderbird (en-US)Windows application
Affected:78.0 78.2Fixed in:78.2Mozilla
Affected:68.0 68.12Fixed in:68.12Mozilla

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionRequired
ScopeUnchanged

Impact

ConfidentialityHigh
IntegrityHigh
AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Exploit Intelligence

2.72%probability of exploitation in 30 days
84thpercentile

Elevated risk: more likely to be exploited than 84% of all known CVEs.

References

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.