CVE-2021-38492

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 delegating navigations to the operating system, Firefox would accept the `mk` scheme which might allow attackers to launch pages and execute scripts in Internet Explorer in unprivileged mode. *This bug only affects Firefox for Windows. Other operating systems are unaffected.*. This vulnerability affects Firefox < 92, Thunderbird < 91.1, Thunderbird < 78.14, Firefox ESR < 78.14, and Firefox ESR < 91.1.

References

https://www.mozilla.org/security/advisories/mfsa2021-41/

https://www.mozilla.org/security/advisories/mfsa2021-40/

https://www.mozilla.org/security/advisories/mfsa2021-42/

https://www.mozilla.org/security/advisories/mfsa2021-38/

https://www.mozilla.org/security/advisories/mfsa2021-39/

https://bugzilla.mozilla.org/show_bug.cgi?id=1721107

Details

Source: MITRE

Published: 2021-11-03

Updated: 2021-11-04

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

Tenable Plugins

View all (16 total)

IDNameProductFamilySeverity
154214openSUSE 15 Security Update : MozillaFirefox (openSUSE-SU-2021:1367-1)NessusSuSE Local Security Checks
critical
154212SUSE SLES11 Security Update : MozillaFirefox, rust-cbindgen (SUSE-SU-2021:14826-1)NessusSuSE Local Security Checks
critical
154193openSUSE 15 Security Update : MozillaFirefox (openSUSE-SU-2021:3451-1)NessusSuSE Local Security Checks
critical
154182SUSE SLED15 / SLES15 Security Update : MozillaFirefox (SUSE-SU-2021:3451-1)NessusSuSE Local Security Checks
critical
154011openSUSE 15 Security Update : MozillaFirefox (openSUSE-SU-2021:3331-1)NessusSuSE Local Security Checks
critical
154003SUSE SLES15 Security Update : MozillaFirefox (SUSE-SU-2021:3331-1)NessusSuSE Local Security Checks
critical
153840SUSE SLES11 Security Update : MozillaFirefox (SUSE-SU-2021:14821-1)NessusSuSE Local Security Checks
high
153576SUSE SLED12 / SLES12 Security Update : MozillaFirefox (SUSE-SU-2021:3191-1)NessusSuSE Local Security Checks
high
153112Mozilla Thunderbird < 78.14NessusMacOS X Local Security Checks
high
153111Mozilla Thunderbird < 78.14NessusWindows
high
153106Mozilla Firefox ESR < 91.1NessusMacOS X Local Security Checks
high
153105Mozilla Firefox ESR < 91.1NessusWindows
high
153091Mozilla Firefox ESR < 78.14NessusMacOS X Local Security Checks
high
153090Mozilla Firefox ESR < 78.14NessusWindows
high
153089Mozilla Firefox < 92.0NessusWindows
high
153088Mozilla Firefox < 92.0NessusMacOS X Local Security Checks
high