CVE-2020-15682

medium
New! CVE Severity Now Using CVSS v3

The calculated severity for CVEs has been updated to use CVSS v3 by default. CVEs that do not have a CVSS v3 score will fall back CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

Description

When a link to an external protocol was clicked, a prompt was presented that allowed the user to choose what application to open it in. An attacker could induce that prompt to be associated with an origin they didn't control, resulting in a spoofing attack. This was fixed by changing external protocol prompts to be tab-modal while also ensuring they could not be incorrectly associated with a different origin. This vulnerability affects Firefox < 82.

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1636654

https://www.mozilla.org/security/advisories/mfsa2020-45/

Details

Source: MITRE

Published: 2020-10-22

Updated: 2020-10-30

Type: CWE-346

Risk Information

CVSS v2

Base Score: 4.3

Vector: AV:N/AC:M/Au:N/C:N/I:P/A:N

Impact Score: 2.9

Exploitability Score: 8.6

Severity: MEDIUM

CVSS v3

Base Score: 6.5

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

Impact Score: 3.6

Exploitability Score: 2.8

Severity: MEDIUM

Vulnerable Software

Configuration 1

OR

cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*

Tenable Plugins

View all (4 total)

IDNameProductFamilySeverity
141923Ubuntu 16.04 LTS : Firefox vulnerabilities (USN-4599-2)NessusUbuntu Local Security Checks
critical
141863Ubuntu 18.04 LTS / 20.04 LTS / 20.10 : Firefox vulnerabilities (USN-4599-1)NessusUbuntu Local Security Checks
critical
141572Mozilla Firefox < 82.0NessusMacOS X Local Security Checks
critical
141571Mozilla Firefox < 82.0NessusWindows
critical