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Vulnerability details: VCID-19zf-ejew-aaaa
Vulnerability ID VCID-19zf-ejew-aaaa
Aliases CVE-2021-23973
Summary 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.
Status Published
Exploitability 0.5
Weighted Severity 9.0
Risk 4.5
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-209 Generation of Error Message Containing Sensitive Information
System Score Found at
generic_textual Low http://people.canonical.com/~ubuntu-security/cve/2021/CVE-2021-23973.html
rhas Critical https://access.redhat.com/errata/RHSA-2021:0655
rhas Critical https://access.redhat.com/errata/RHSA-2021:0656
rhas Important https://access.redhat.com/errata/RHSA-2021:0657
rhas Important https://access.redhat.com/errata/RHSA-2021:0658
rhas Critical https://access.redhat.com/errata/RHSA-2021:0659
rhas Critical https://access.redhat.com/errata/RHSA-2021:0660
rhas Important https://access.redhat.com/errata/RHSA-2021:0661
rhas Important https://access.redhat.com/errata/RHSA-2021:0662
cvssv3 6.5 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-23973.json
epss 0.00533 https://api.first.org/data/v1/epss?cve=CVE-2021-23973
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epss 0.00606 https://api.first.org/data/v1/epss?cve=CVE-2021-23973
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epss 0.00705 https://api.first.org/data/v1/epss?cve=CVE-2021-23973
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epss 0.00705 https://api.first.org/data/v1/epss?cve=CVE-2021-23973
epss 0.01085 https://api.first.org/data/v1/epss?cve=CVE-2021-23973
epss 0.01085 https://api.first.org/data/v1/epss?cve=CVE-2021-23973
epss 0.01085 https://api.first.org/data/v1/epss?cve=CVE-2021-23973
epss 0.01085 https://api.first.org/data/v1/epss?cve=CVE-2021-23973
epss 0.01085 https://api.first.org/data/v1/epss?cve=CVE-2021-23973
epss 0.01085 https://api.first.org/data/v1/epss?cve=CVE-2021-23973
epss 0.01085 https://api.first.org/data/v1/epss?cve=CVE-2021-23973
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epss 0.01085 https://api.first.org/data/v1/epss?cve=CVE-2021-23973
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epss 0.01085 https://api.first.org/data/v1/epss?cve=CVE-2021-23973
epss 0.01265 https://api.first.org/data/v1/epss?cve=CVE-2021-23973
generic_textual Low https://bugzilla.mozilla.org/show_bug.cgi?id=1690976
rhbs low https://bugzilla.redhat.com/show_bug.cgi?id=1932111
generic_textual Medium https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-23968
generic_textual Medium https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-23969
generic_textual Low https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-23973
generic_textual Medium https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-23978
cvssv3.1 6.5 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv2 4.3 https://nvd.nist.gov/vuln/detail/CVE-2021-23973
cvssv3 6.5 https://nvd.nist.gov/vuln/detail/CVE-2021-23973
cvssv3.1 6.5 https://nvd.nist.gov/vuln/detail/CVE-2021-23973
archlinux High https://security.archlinux.org/AVG-1599
archlinux High https://security.archlinux.org/AVG-1601
generic_textual Medium https://ubuntu.com/security/notices/USN-4756-1
generic_textual Low https://ubuntu.com/security/notices/USN-4936-1
generic_textual high https://www.mozilla.org/en-US/security/advisories/mfsa2021-07
generic_textual Low https://www.mozilla.org/en-US/security/advisories/mfsa2021-07/#CVE-2021-23973
generic_textual high https://www.mozilla.org/en-US/security/advisories/mfsa2021-08
generic_textual Low https://www.mozilla.org/en-US/security/advisories/mfsa2021-08/#CVE-2021-23973
generic_textual high https://www.mozilla.org/en-US/security/advisories/mfsa2021-09
generic_textual Low https://www.mozilla.org/en-US/security/advisories/mfsa2021-09/#CVE-2021-23973
generic_textual Medium https://www.mozilla.org/security/advisories/mfsa2021-07/
generic_textual Medium https://www.mozilla.org/security/advisories/mfsa2021-08/
generic_textual Medium https://www.mozilla.org/security/advisories/mfsa2021-09/
Reference id Reference type URL
http://people.canonical.com/~ubuntu-security/cve/2021/CVE-2021-23973.html
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-23973.json
https://api.first.org/data/v1/epss?cve=CVE-2021-23973
https://bugzilla.mozilla.org/show_bug.cgi?id=1690976
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-23968
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-23969
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-23973
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-23978
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
https://lists.debian.org/debian-lts-announce/2021/03/msg00000.html
https://security.gentoo.org/glsa/202104-09
https://security.gentoo.org/glsa/202104-10
https://ubuntu.com/security/notices/USN-4756-1
https://ubuntu.com/security/notices/USN-4936-1
https://www.debian.org/security/2021/dsa-4866
https://www.mozilla.org/en-US/security/advisories/mfsa2021-07/#CVE-2021-23973
https://www.mozilla.org/en-US/security/advisories/mfsa2021-08/#CVE-2021-23973
https://www.mozilla.org/en-US/security/advisories/mfsa2021-09/#CVE-2021-23973
https://www.mozilla.org/security/advisories/mfsa2021-07/
https://www.mozilla.org/security/advisories/mfsa2021-08/
https://www.mozilla.org/security/advisories/mfsa2021-09/
1932111 https://bugzilla.redhat.com/show_bug.cgi?id=1932111
AVG-1599 https://security.archlinux.org/AVG-1599
AVG-1601 https://security.archlinux.org/AVG-1601
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
CVE-2021-23973 https://nvd.nist.gov/vuln/detail/CVE-2021-23973
mfsa2021-07 https://www.mozilla.org/en-US/security/advisories/mfsa2021-07
mfsa2021-08 https://www.mozilla.org/en-US/security/advisories/mfsa2021-08
mfsa2021-09 https://www.mozilla.org/en-US/security/advisories/mfsa2021-09
RHSA-2021:0655 https://access.redhat.com/errata/RHSA-2021:0655
RHSA-2021:0656 https://access.redhat.com/errata/RHSA-2021:0656
RHSA-2021:0657 https://access.redhat.com/errata/RHSA-2021:0657
RHSA-2021:0658 https://access.redhat.com/errata/RHSA-2021:0658
RHSA-2021:0659 https://access.redhat.com/errata/RHSA-2021:0659
RHSA-2021:0660 https://access.redhat.com/errata/RHSA-2021:0660
RHSA-2021:0661 https://access.redhat.com/errata/RHSA-2021:0661
RHSA-2021:0662 https://access.redhat.com/errata/RHSA-2021:0662
USN-4756-1 https://usn.ubuntu.com/4756-1/
USN-4936-1 https://usn.ubuntu.com/4936-1/
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-23973.json
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N Found at https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: AV:N/AC:M/Au:N/C:P/I:N/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2021-23973
Exploitability (E) Access Vector (AV) Access Complexity (AC) Authentication (Au) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

high

functional

unproven

proof_of_concept

not_defined

local

adjacent_network

network

high

medium

low

multiple

single

none

none

partial

complete

none

partial

complete

none

partial

complete
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2021-23973
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2021-23973
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.77141
EPSS Score 0.00533
Published At Jan. 16, 2025, midnight
Date Actor Action Source VulnerableCode Version
There are no relevant records.