CVE-2020-12423

high
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 the Windows DLL "webauthn.dll" was missing from the Operating System, and a malicious one was placed in a folder in the user's %PATH%, Firefox may have loaded the DLL, leading to arbitrary code execution. *Note: This issue only affects the Windows operating system; other operating systems are unaffected.* This vulnerability affects Firefox < 78.

References

http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00027.html

http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00049.html

https://bugzilla.mozilla.org/show_bug.cgi?id=1642400

https://www.mozilla.org/security/advisories/mfsa2020-24/

Details

Source: MITRE

Published: 2020-07-09

Updated: 2020-07-20

Type: CWE-427

Risk Information

CVSS v2

Base Score: 6.9

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

Impact Score: 10

Exploitability Score: 3.4

Severity: MEDIUM

CVSS v3

Base Score: 7.8

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

Impact Score: 5.9

Exploitability Score: 1.8

Severity: HIGH

Tenable Plugins

View all (9 total)

IDNameProductFamilySeverity
150683SUSE SLES11 Security Update : MozillaFirefox (SUSE-SU-2020:14421-1)NessusSuSE Local Security Checks
high
138786openSUSE Security Update : MozillaFirefox (openSUSE-2020-1017)NessusSuSE Local Security Checks
high
138747openSUSE Security Update : MozillaFirefox (openSUSE-2020-983)NessusSuSE Local Security Checks
high
138589Mozilla Thunderbird < 78.0NessusWindows
high
138588Mozilla Thunderbird < 78.0NessusMacOS X Local Security Checks
high
138494SUSE SLES12 Security Update : MozillaFirefox (SUSE-SU-2020:1899-1)NessusSuSE Local Security Checks
high
138493SUSE SLED15 / SLES15 Security Update : MozillaFirefox (SUSE-SU-2020:1898-1)NessusSuSE Local Security Checks
high
138085Mozilla Firefox < 78.0NessusWindows
high
138084Mozilla Firefox < 78.0NessusMacOS X Local Security Checks
high