CVE-2021-23973

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 trying to load a cross-origin resource in an audio/video context a decoding error may have resulted, and the content of that error may have revealed information about the resource. This vulnerability affects Firefox < 86, Thunderbird < 78.8, and Firefox ESR < 78.8.

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1690976

https://www.mozilla.org/security/advisories/mfsa2021-08/

https://www.mozilla.org/security/advisories/mfsa2021-09/

https://www.mozilla.org/security/advisories/mfsa2021-07/

https://lists.debian.org/debian-lts-announce/2021/03/msg00000.html

https://www.debian.org/security/2021/dsa-4866

https://security.gentoo.org/glsa/202104-09

https://security.gentoo.org/glsa/202104-10

Details

Source: MITRE

Published: 2021-02-26

Updated: 2021-05-01

Type: CWE-209

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 (39 total)

IDNameProductFamilySeverity
150571SUSE SLES11 Security Update : MozillaFirefox (SUSE-SU-2021:14657-1)NessusSuSE Local Security Checks
high
149322Ubuntu 20.04 LTS / 20.10 : Thunderbird vulnerabilities (USN-4936-1)NessusUbuntu Local Security Checks
high
149233GLSA-202104-10 : Mozilla Firefox: Multiple vulnerabilitiesNessusGentoo Local Security Checks
high
149226GLSA-202104-09 : Mozilla Thunderbird: Multiple vulnerabilitiesNessusGentoo Local Security Checks
high
148973Scientific Linux Security Update : firefox on SL7.x i686/x86_64 (2021:0656)NessusScientific Linux Local Security Checks
high
148972Scientific Linux Security Update : thunderbird on SL7.x x86_64 (2021:0661)NessusScientific Linux Local Security Checks
high
147994Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS / 20.10 : Firefox vulnerabilities (USN-4756-1)NessusUbuntu Local Security Checks
high
147908Amazon Linux 2 : thunderbird (ALAS-2021-1618)NessusAmazon Linux Local Security Checks
high
147173openSUSE Security Update : MozillaThunderbird (openSUSE-2021-387)NessusSuSE Local Security Checks
high
147157openSUSE Security Update : MozillaFirefox (openSUSE-2021-373)NessusSuSE Local Security Checks
high
146984SUSE SLES15 Security Update : MozillaFirefox (SUSE-SU-2021:0676-1)NessusSuSE Local Security Checks
high
146946SUSE SLED15 / SLES15 Security Update : MozillaFirefox (SUSE-SU-2021:0659-1)NessusSuSE Local Security Checks
high
146945Debian DLA-2578-1 : thunderbird security updateNessusDebian Local Security Checks
high
146942Debian DSA-4866-1 : thunderbird - security updateNessusDebian Local Security Checks
high
146940SUSE SLES12 Security Update : MozillaFirefox (SUSE-SU-2021:0667-1)NessusSuSE Local Security Checks
high
146919Debian DLA-2575-1 : firefox-esr security updateNessusDebian Local Security Checks
high
146892Debian DSA-4862-1 : firefox-esr - security updateNessusDebian Local Security Checks
high
146882CentOS 7 : firefox (CESA-2021:0656)NessusCentOS Local Security Checks
high
146879CentOS 7 : thunderbird (CESA-2021:0661)NessusCentOS Local Security Checks
high
146872CentOS 8 : thunderbird (CESA-2021:0657)NessusCentOS Local Security Checks
high
146870CentOS 8 : firefox (CESA-2021:0655)NessusCentOS Local Security Checks
high
146868Oracle Linux 8 : SUMM: / thunderbird (ELSA-2021-0657)NessusOracle Linux Local Security Checks
high
146867Oracle Linux 7 : thunderbird (ELSA-2021-0661)NessusOracle Linux Local Security Checks
high
146866Oracle Linux 8 : SUMM: / firefox (ELSA-2021-0655)NessusOracle Linux Local Security Checks
high
146865Oracle Linux 7 : firefox (ELSA-2021-0656)NessusOracle Linux Local Security Checks
high
146822RHEL 8 : thunderbird (RHSA-2021:0662)NessusRed Hat Local Security Checks
high
146817RHEL 8 : firefox (RHSA-2021:0659)NessusRed Hat Local Security Checks
high
146816RHEL 7 : thunderbird (RHSA-2021:0661)NessusRed Hat Local Security Checks
high
146815RHEL 8 : thunderbird (RHSA-2021:0657)NessusRed Hat Local Security Checks
high
146813RHEL 7 : firefox (RHSA-2021:0656)NessusRed Hat Local Security Checks
high
146812RHEL 8 : thunderbird (RHSA-2021:0658)NessusRed Hat Local Security Checks
high
146811RHEL 8 : firefox (RHSA-2021:0660)NessusRed Hat Local Security Checks
high
146809RHEL 8 : firefox (RHSA-2021:0655)NessusRed Hat Local Security Checks
high
146784Mozilla Thunderbird < 78.8NessusMacOS X Local Security Checks
high
146783Mozilla Thunderbird < 78.8NessusWindows
high
146782Mozilla Firefox ESR < 78.8NessusMacOS X Local Security Checks
high
146781Mozilla Firefox ESR < 78.8NessusWindows
high
146780Mozilla Firefox < 86.0NessusWindows
high
146779Mozilla Firefox < 86.0NessusMacOS X Local Security Checks
high