Vulnerability · Published Oct 1, 2020 · Assigned by mozilla
CVE-2020-15663
High 8.8
In plain English
A high-severity security flaw in Firefox from Mozilla. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 2.7% (higher than 86% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.20 | firefox | 80.0-r0 | ALPINE-CVE-2020-15663 |
| Alpine:v3.21 | firefox | 80.0-r0 | ALPINE-CVE-2020-15663 |
| Alpine:v3.22 | firefox | 80.0-r0 | ALPINE-CVE-2020-15663 |
| Alpine:v3.23 | firefox | 80.0-r0 | ALPINE-CVE-2020-15663 |
| Alpine:v3.20 | firefox-esr | 78.2.0-r0 | ALPINE-CVE-2020-15663 |
| Alpine:v3.21 | firefox-esr | 78.2.0-r0 | ALPINE-CVE-2020-15663 |
| Alpine:v3.22 | firefox-esr | 78.2.0-r0 | ALPINE-CVE-2020-15663 |
| Alpine:v3.23 | firefox-esr | 78.2.0-r0 | ALPINE-CVE-2020-15663 |
| Alpine:v3.21 | librewolf | 80.0-r0 | ALPINE-CVE-2020-15663 |
| Alpine:v3.22 | librewolf | 80.0-r0 | ALPINE-CVE-2020-15663 |
| Alpine:v3.23 | librewolf | 80.0-r0 | ALPINE-CVE-2020-15663 |
| Alpine:v3.24 | librewolf | 80.0-r0 | ALPINE-CVE-2020-15663 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Mozilla | Firefox | unspecified – before 80 |
| Mozilla | Thunderbird | unspecified – before 78.2unspecified – before 68.12 |
| Mozilla | Firefox ESR | unspecified – before 68.12unspecified – before 78.2 |
References
- https://www.mozilla.org/security/advisories/mfsa2020-41/ x_refsource_MISC
- https://www.mozilla.org/security/advisories/mfsa2020-36/ x_refsource_MISC
- https://www.mozilla.org/security/advisories/mfsa2020-38/ x_refsource_MISC
- https://www.mozilla.org/security/advisories/mfsa2020-40/ x_refsource_MISC
- https://www.mozilla.org/security/advisories/mfsa2020-37/ x_refsource_MISC
- https://bugzilla.mozilla.org/show_bug.cgi?id=1643199 x_refsource_MISC