CVE-2020-26966

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

Searching for a single word from the address bar caused an mDNS request to be sent on the local network searching for a hostname consisting of that string; resulting in an information leak. *Note: This issue only affected Windows operating systems. Other operating systems are unaffected.*. This vulnerability affects Firefox < 83, Firefox ESR < 78.5, and Thunderbird < 78.5.

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1663571

https://www.mozilla.org/security/advisories/mfsa2020-50/

https://www.mozilla.org/security/advisories/mfsa2020-51/

https://www.mozilla.org/security/advisories/mfsa2020-52/

Details

Source: MITRE

Published: 2020-12-09

Updated: 2020-12-10

Risk Information

CVSS v2

Base Score: 4.3

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

Impact Score: 3.6

Exploitability Score: 2.8

Severity: MEDIUM

Tenable Plugins

View all (15 total)

IDNameProductFamilySeverity
150523SUSE SLES11 Security Update : MozillaFirefox (SUSE-SU-2020:14548-1)NessusSuSE Local Security Checks
high
145368openSUSE Security Update : MozillaFirefox (openSUSE-2020-2315)NessusSuSE Local Security Checks
high
143745SUSE SLED15 / SLES15 Security Update : MozillaFirefox (SUSE-SU-2020:3383-1)NessusSuSE Local Security Checks
high
143741SUSE SLES12 Security Update : MozillaFirefox (SUSE-SU-2020:3548-1)NessusSuSE Local Security Checks
high
143723SUSE SLED15 / SLES15 Security Update : MozillaFirefox (SUSE-SU-2020:3458-1)NessusSuSE Local Security Checks
high
143540openSUSE Security Update : MozillaThunderbird (openSUSE-2020-2187)NessusSuSE Local Security Checks
high
143357openSUSE Security Update : MozillaThunderbird (openSUSE-2020-2096)NessusSuSE Local Security Checks
high
143352openSUSE Security Update : MozillaFirefox (openSUSE-2020-2020)NessusSuSE Local Security Checks
high
143340openSUSE Security Update : MozillaFirefox (openSUSE-2020-2031)NessusSuSE Local Security Checks
high
143059Mozilla Thunderbird < 78.5NessusMacOS X Local Security Checks
high
143058Mozilla Thunderbird < 78.5NessusWindows
high
142913Mozilla Firefox ESR < 78.5NessusWindows
high
142912Mozilla Firefox ESR < 78.5NessusMacOS X Local Security Checks
high
142911Mozilla Firefox < 83.0NessusMacOS X Local Security Checks
high
142910Mozilla Firefox < 83.0NessusWindows
high