CVE-2021-23973 - Mozilla: MediaError message property could have leaked information about cross-origin resources

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MEDIUM

Mozilla: MediaError message property could have leaked information about cross-origin resources

Published Feb 26, 2021

6.5

MEDIUM

CVSS 3.1

EPSS 1.37%

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.

Affected products

Vendor Mozilla Product Firefox Default
n/a
- Version
  < 86
  Status
  affected
  Constraints
  -
Vendor Mozilla Product Firefox ESR Default
n/a
- Version
  < 78.8
  Status
  affected
  Constraints
  -
Vendor Mozilla Product Thunderbird Default
n/a
- Version
  < 78.8
  Status
  affected
  Constraints
  -

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor

Product

Default status

Versions

Mozilla

Firefox

n/a

Version	Status	Constraints
< 86	affected	-

Mozilla

Firefox ESR

n/a

Version	Status	Constraints
< 78.8	affected	-

Mozilla

Thunderbird

n/a

Version	Status	Constraints
< 78.8	affected	-

Red Hat Enterprise Linux 7

firefox-0:78.8.0-1.el7_9

Fixed · RHSA-2021:0656
Red Hat Enterprise Linux 7

thunderbird-0:78.8.0-1.el7_9

Fixed · RHSA-2021:0661
Red Hat Enterprise Linux 8

firefox-0:78.8.0-1.el8_3

Fixed · RHSA-2021:0655
Red Hat Enterprise Linux 8

thunderbird-0:78.8.0-1.el8_3

Fixed · RHSA-2021:0657
Red Hat Enterprise Linux 8.1 Extended Update Support

firefox-0:78.8.0-1.el8_1

Fixed · RHSA-2021:0659
Red Hat Enterprise Linux 8.1 Extended Update Support

thunderbird-0:78.8.0-1.el8_1

Fixed · RHSA-2021:0658
Red Hat Enterprise Linux 8.2 Extended Update Support

firefox-0:78.8.0-1.el8_2

Fixed · RHSA-2021:0660
Red Hat Enterprise Linux 8.2 Extended Update Support

thunderbird-0:78.8.0-1.el8_2

Fixed · RHSA-2021:0662
Red Hat Enterprise Linux 6

firefox

Out of support scope
Red Hat Enterprise Linux 6

thunderbird

Out of support scope

Product	Package	State	Advisory
Red Hat Enterprise Linux 7	firefox-0:78.8.0-1.el7_9	Fixed	RHSA-2021:0656
Red Hat Enterprise Linux 7	thunderbird-0:78.8.0-1.el7_9	Fixed	RHSA-2021:0661
Red Hat Enterprise Linux 8	firefox-0:78.8.0-1.el8_3	Fixed	RHSA-2021:0655
Red Hat Enterprise Linux 8	thunderbird-0:78.8.0-1.el8_3	Fixed	RHSA-2021:0657
Red Hat Enterprise Linux 8.1 Extended Update Support	firefox-0:78.8.0-1.el8_1	Fixed	RHSA-2021:0659
Red Hat Enterprise Linux 8.1 Extended Update Support	thunderbird-0:78.8.0-1.el8_1	Fixed	RHSA-2021:0658
Red Hat Enterprise Linux 8.2 Extended Update Support	firefox-0:78.8.0-1.el8_2	Fixed	RHSA-2021:0660
Red Hat Enterprise Linux 8.2 Extended Update Support	thunderbird-0:78.8.0-1.el8_2	Fixed	RHSA-2021:0662
Red Hat Enterprise Linux 6	firefox	Out of support scope	n/a
Red Hat Enterprise Linux 6	thunderbird	Out of support scope	n/a

Remediation

No remediation recorded yet.

Weaknesses (1)

CWE-209

References (13)

https://access.redhat.com/security/cve/CVE-2021-23973
Vendor Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1690976
x_refsource_MISCIssue TrackingPermissions RequiredVendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1932111
Issue Tracking
https://lists.debian.org/debian-lts-announce/2021/03/msg00000.html
mailing-listx_refsource_MLISTMailing ListThird Party Advisory
https://nvd.nist.gov/vuln/detail/CVE-2021-23973
https://security.gentoo.org/glsa/202104-09
vendor-advisoryx_refsource_GENTOOThird Party Advisory
https://security.gentoo.org/glsa/202104-10
vendor-advisoryx_refsource_GENTOOThird Party Advisory
https://www.cve.org/CVERecord?id=CVE-2021-23973
https://www.debian.org/security/2021/dsa-4866
vendor-advisoryx_refsource_DEBIANThird Party Advisory
https://www.mozilla.org/en-US/security/advisories/mfsa2021-08/#CVE-2021-23973
https://www.mozilla.org/security/advisories/mfsa2021-07/
x_refsource_MISCRelease NotesVendor Advisory
https://www.mozilla.org/security/advisories/mfsa2021-08/
x_refsource_MISCRelease NotesVendor Advisory
https://www.mozilla.org/security/advisories/mfsa2021-09/
x_refsource_MISCRelease NotesVendor Advisory

Link	Providers	Tags
https://access.redhat.com/security/cve/CVE-2021-23973		Vendor Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1690976		x_refsource_MISCIssue TrackingPermissions RequiredVendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1932111		Issue Tracking
https://lists.debian.org/debian-lts-announce/2021/03/msg00000.html		mailing-listx_refsource_MLISTMailing ListThird Party Advisory
https://nvd.nist.gov/vuln/detail/CVE-2021-23973
https://security.gentoo.org/glsa/202104-09		vendor-advisoryx_refsource_GENTOOThird Party Advisory
https://security.gentoo.org/glsa/202104-10		vendor-advisoryx_refsource_GENTOOThird Party Advisory
https://www.cve.org/CVERecord?id=CVE-2021-23973
https://www.debian.org/security/2021/dsa-4866		vendor-advisoryx_refsource_DEBIANThird Party Advisory
https://www.mozilla.org/en-US/security/advisories/mfsa2021-08/#CVE-2021-23973
https://www.mozilla.org/security/advisories/mfsa2021-07/		x_refsource_MISCRelease NotesVendor Advisory
https://www.mozilla.org/security/advisories/mfsa2021-08/		x_refsource_MISCRelease NotesVendor Advisory
https://www.mozilla.org/security/advisories/mfsa2021-09/		x_refsource_MISCRelease NotesVendor Advisory