CVE-2020-15658 Information

Description

The code for downloading files did not properly take care of special characters which led to an attacker being able to cut off the file ending at an earlier position leading to a different file type being downloaded than shown in the dialog. This vulnerability affects Firefox ESR 78.1 Firefox 79 and Thunderbird 78.1.

CVSS Vector

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

Reference

http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00025.html https://bugzilla.mozilla.org/show_bug.cgi?id=1637745 https://usn.ubuntu.com/4443-1/ https://www.mozilla.org/security/advisories/mfsa2020-30/ https://www.mozilla.org/security/advisories/mfsa2020-32/ https://www.mozilla.org/security/advisories/mfsa2020-33/

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

REQUIRED

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

HIGH

Base Score

NONE

Base Severity

6.5