CVE-2020-35112

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.

8.8

CVSS

Severity: High

CVSS 3.1 •

CVSS 2.0 •

EPSS 0.53%

Vendor Advisory mozilla.org Vendor Advisory mozilla.org Vendor Advisory mozilla.org

Affected: Mozilla Firefox

Affected: Mozilla Thunderbird

Affected: Mozilla Firefox ESR

References

Link	Tags
https://www.mozilla.org/security/advisories/mfsa2020-54/	vendor advisory
https://www.mozilla.org/security/advisories/mfsa2020-56/	vendor advisory
https://www.mozilla.org/security/advisories/mfsa2020-55/	vendor advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1661365	permissions required

Frequently Asked Questions

What is the severity of CVE-2020-35112?: CVE-2020-35112 has been scored as a high severity vulnerability.
How to fix CVE-2020-35112?: To fix CVE-2020-35112, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2020-35112 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2020-35112 is being actively exploited. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2020-35112?: CVE-2020-35112 affects Mozilla Firefox, Mozilla Thunderbird, Mozilla Firefox ESR.

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