Vulnerability · Published Jan 7, 2021 · Assigned by mozilla
CVE-2020-35112
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 1.3% (higher than 70% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
If a user downloaded a file lacking an extension on Windows, and then "Open"-ed it from the downloads panel, if there was an executable file in the downloads directory with the same name but with an executable extension (such as .bat or .exe) that executable would have been launched instead. *Note: This issue only affected Windows operating systems. Other operating systems are unaffected.*. This vulnerability affects Firefox < 84, Thunderbird < 78.6, and Firefox ESR < 78.6.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.20 | firefox | 84.0.1-r0 | ALPINE-CVE-2020-35112 |
| Alpine:v3.21 | firefox | 84.0.1-r0 | ALPINE-CVE-2020-35112 |
| Alpine:v3.22 | firefox | 84.0.1-r0 | ALPINE-CVE-2020-35112 |
| Alpine:v3.23 | firefox | 84.0.1-r0 | ALPINE-CVE-2020-35112 |
| Alpine:v3.20 | firefox-esr | 78.6.0-r0 | ALPINE-CVE-2020-35112 |
| Alpine:v3.21 | firefox-esr | 78.6.0-r0 | ALPINE-CVE-2020-35112 |
| Alpine:v3.22 | firefox-esr | 78.6.0-r0 | ALPINE-CVE-2020-35112 |
| Alpine:v3.23 | firefox-esr | 78.6.0-r0 | ALPINE-CVE-2020-35112 |
| Alpine:v3.21 | librewolf | 84.0.1-r0 | ALPINE-CVE-2020-35112 |
| Alpine:v3.22 | librewolf | 84.0.1-r0 | ALPINE-CVE-2020-35112 |
| Alpine:v3.23 | librewolf | 84.0.1-r0 | ALPINE-CVE-2020-35112 |
| Alpine:v3.24 | librewolf | 84.0.1-r0 | ALPINE-CVE-2020-35112 |
| Alpine:v3.20 | thunderbird | 78.6.1-r0 | ALPINE-CVE-2020-35112 |
| Alpine:v3.21 | thunderbird | 78.6.1-r0 | ALPINE-CVE-2020-35112 |
| Alpine:v3.22 | thunderbird | 78.6.1-r0 | ALPINE-CVE-2020-35112 |
| Alpine:v3.23 | thunderbird | 78.6.1-r0 | ALPINE-CVE-2020-35112 |
| Ubuntu:22.04:LTS | mozjs78 | no fix listed | UBUNTU-CVE-2020-35112 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Mozilla | Firefox | unspecified – before 84 |
| Mozilla | Thunderbird | unspecified – before 78.6 |
| Mozilla | Firefox ESR | unspecified – before 78.6 |
References
- https://www.mozilla.org/security/advisories/mfsa2020-54/ x_refsource_MISC
- https://www.mozilla.org/security/advisories/mfsa2020-56/ x_refsource_MISC
- https://www.mozilla.org/security/advisories/mfsa2020-55/ x_refsource_MISC
- https://bugzilla.mozilla.org/show_bug.cgi?id=1661365 x_refsource_MISC