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Vulnerability details: VCID-umyp-1yd2-aaab
Vulnerability ID VCID-umyp-1yd2-aaab
Aliases CVE-2021-29974
Summary When network partitioning was enabled, e.g. as a result of Enhanced Tracking Protection settings, a TLS error page would allow the user to override an error on a domain which had specified HTTP Strict Transport Security (which implies that the error should not be override-able.) This issue did not affect the network connections, and they were correctly upgraded to HTTPS automatically. This vulnerability affects Firefox < 90.
Status Published
Exploitability 0.5
Weighted Severity 8.0
Risk 4.0
Affected and Fixed Packages Package Details
Weaknesses (0)
There are no known CWE.
System Score Found at
generic_textual Medium http://people.canonical.com/~ubuntu-security/cve/2021/CVE-2021-29974.html
epss 0.00080 https://api.first.org/data/v1/epss?cve=CVE-2021-29974
epss 0.00080 https://api.first.org/data/v1/epss?cve=CVE-2021-29974
epss 0.00080 https://api.first.org/data/v1/epss?cve=CVE-2021-29974
epss 0.00080 https://api.first.org/data/v1/epss?cve=CVE-2021-29974
epss 0.00101 https://api.first.org/data/v1/epss?cve=CVE-2021-29974
epss 0.00101 https://api.first.org/data/v1/epss?cve=CVE-2021-29974
epss 0.00101 https://api.first.org/data/v1/epss?cve=CVE-2021-29974
epss 0.00101 https://api.first.org/data/v1/epss?cve=CVE-2021-29974
epss 0.00101 https://api.first.org/data/v1/epss?cve=CVE-2021-29974
epss 0.00101 https://api.first.org/data/v1/epss?cve=CVE-2021-29974
epss 0.00101 https://api.first.org/data/v1/epss?cve=CVE-2021-29974
epss 0.00101 https://api.first.org/data/v1/epss?cve=CVE-2021-29974
epss 0.00101 https://api.first.org/data/v1/epss?cve=CVE-2021-29974
epss 0.00101 https://api.first.org/data/v1/epss?cve=CVE-2021-29974
epss 0.00101 https://api.first.org/data/v1/epss?cve=CVE-2021-29974
epss 0.00101 https://api.first.org/data/v1/epss?cve=CVE-2021-29974
epss 0.00391 https://api.first.org/data/v1/epss?cve=CVE-2021-29974
epss 0.00391 https://api.first.org/data/v1/epss?cve=CVE-2021-29974
epss 0.00391 https://api.first.org/data/v1/epss?cve=CVE-2021-29974
epss 0.00391 https://api.first.org/data/v1/epss?cve=CVE-2021-29974
epss 0.00391 https://api.first.org/data/v1/epss?cve=CVE-2021-29974
epss 0.00391 https://api.first.org/data/v1/epss?cve=CVE-2021-29974
epss 0.00391 https://api.first.org/data/v1/epss?cve=CVE-2021-29974
epss 0.00391 https://api.first.org/data/v1/epss?cve=CVE-2021-29974
epss 0.00391 https://api.first.org/data/v1/epss?cve=CVE-2021-29974
epss 0.00391 https://api.first.org/data/v1/epss?cve=CVE-2021-29974
epss 0.00391 https://api.first.org/data/v1/epss?cve=CVE-2021-29974
epss 0.00391 https://api.first.org/data/v1/epss?cve=CVE-2021-29974
epss 0.00391 https://api.first.org/data/v1/epss?cve=CVE-2021-29974
epss 0.00391 https://api.first.org/data/v1/epss?cve=CVE-2021-29974
epss 0.00391 https://api.first.org/data/v1/epss?cve=CVE-2021-29974
epss 0.00391 https://api.first.org/data/v1/epss?cve=CVE-2021-29974
epss 0.00391 https://api.first.org/data/v1/epss?cve=CVE-2021-29974
epss 0.00391 https://api.first.org/data/v1/epss?cve=CVE-2021-29974
epss 0.00391 https://api.first.org/data/v1/epss?cve=CVE-2021-29974
epss 0.00391 https://api.first.org/data/v1/epss?cve=CVE-2021-29974
epss 0.00391 https://api.first.org/data/v1/epss?cve=CVE-2021-29974
epss 0.00391 https://api.first.org/data/v1/epss?cve=CVE-2021-29974
epss 0.00391 https://api.first.org/data/v1/epss?cve=CVE-2021-29974
epss 0.00391 https://api.first.org/data/v1/epss?cve=CVE-2021-29974
epss 0.00391 https://api.first.org/data/v1/epss?cve=CVE-2021-29974
epss 0.00391 https://api.first.org/data/v1/epss?cve=CVE-2021-29974
epss 0.00391 https://api.first.org/data/v1/epss?cve=CVE-2021-29974
epss 0.00391 https://api.first.org/data/v1/epss?cve=CVE-2021-29974
epss 0.00391 https://api.first.org/data/v1/epss?cve=CVE-2021-29974
epss 0.00391 https://api.first.org/data/v1/epss?cve=CVE-2021-29974
epss 0.00391 https://api.first.org/data/v1/epss?cve=CVE-2021-29974
epss 0.00391 https://api.first.org/data/v1/epss?cve=CVE-2021-29974
epss 0.00391 https://api.first.org/data/v1/epss?cve=CVE-2021-29974
epss 0.00391 https://api.first.org/data/v1/epss?cve=CVE-2021-29974
epss 0.00391 https://api.first.org/data/v1/epss?cve=CVE-2021-29974
epss 0.00391 https://api.first.org/data/v1/epss?cve=CVE-2021-29974
epss 0.00391 https://api.first.org/data/v1/epss?cve=CVE-2021-29974
epss 0.00391 https://api.first.org/data/v1/epss?cve=CVE-2021-29974
epss 0.00391 https://api.first.org/data/v1/epss?cve=CVE-2021-29974
epss 0.00391 https://api.first.org/data/v1/epss?cve=CVE-2021-29974
epss 0.00391 https://api.first.org/data/v1/epss?cve=CVE-2021-29974
epss 0.00391 https://api.first.org/data/v1/epss?cve=CVE-2021-29974
epss 0.00391 https://api.first.org/data/v1/epss?cve=CVE-2021-29974
epss 0.00391 https://api.first.org/data/v1/epss?cve=CVE-2021-29974
epss 0.00391 https://api.first.org/data/v1/epss?cve=CVE-2021-29974
epss 0.00391 https://api.first.org/data/v1/epss?cve=CVE-2021-29974
epss 0.00391 https://api.first.org/data/v1/epss?cve=CVE-2021-29974
epss 0.00391 https://api.first.org/data/v1/epss?cve=CVE-2021-29974
epss 0.00391 https://api.first.org/data/v1/epss?cve=CVE-2021-29974
epss 0.00391 https://api.first.org/data/v1/epss?cve=CVE-2021-29974
epss 0.00391 https://api.first.org/data/v1/epss?cve=CVE-2021-29974
epss 0.00391 https://api.first.org/data/v1/epss?cve=CVE-2021-29974
epss 0.00391 https://api.first.org/data/v1/epss?cve=CVE-2021-29974
epss 0.00391 https://api.first.org/data/v1/epss?cve=CVE-2021-29974
epss 0.00391 https://api.first.org/data/v1/epss?cve=CVE-2021-29974
epss 0.00391 https://api.first.org/data/v1/epss?cve=CVE-2021-29974
epss 0.00391 https://api.first.org/data/v1/epss?cve=CVE-2021-29974
epss 0.00393 https://api.first.org/data/v1/epss?cve=CVE-2021-29974
epss 0.00393 https://api.first.org/data/v1/epss?cve=CVE-2021-29974
epss 0.00393 https://api.first.org/data/v1/epss?cve=CVE-2021-29974
epss 0.00393 https://api.first.org/data/v1/epss?cve=CVE-2021-29974
epss 0.00393 https://api.first.org/data/v1/epss?cve=CVE-2021-29974
epss 0.00393 https://api.first.org/data/v1/epss?cve=CVE-2021-29974
epss 0.00393 https://api.first.org/data/v1/epss?cve=CVE-2021-29974
epss 0.00393 https://api.first.org/data/v1/epss?cve=CVE-2021-29974
epss 0.00393 https://api.first.org/data/v1/epss?cve=CVE-2021-29974
epss 0.00393 https://api.first.org/data/v1/epss?cve=CVE-2021-29974
epss 0.00393 https://api.first.org/data/v1/epss?cve=CVE-2021-29974
epss 0.00393 https://api.first.org/data/v1/epss?cve=CVE-2021-29974
epss 0.00624 https://api.first.org/data/v1/epss?cve=CVE-2021-29974
generic_textual Medium https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-29974
cvssv3.1 4.3 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv2 2.6 https://nvd.nist.gov/vuln/detail/CVE-2021-29974
cvssv3 4.3 https://nvd.nist.gov/vuln/detail/CVE-2021-29974
cvssv3.1 4.3 https://nvd.nist.gov/vuln/detail/CVE-2021-29974
archlinux High https://security.archlinux.org/AVG-2148
generic_textual Medium https://ubuntu.com/security/notices/USN-5011-1
generic_textual high https://www.mozilla.org/en-US/security/advisories/mfsa2021-28
generic_textual Medium https://www.mozilla.org/en-US/security/advisories/mfsa2021-28/#CVE-2021-29974
Reference id Reference type URL
http://people.canonical.com/~ubuntu-security/cve/2021/CVE-2021-29974.html
https://api.first.org/data/v1/epss?cve=CVE-2021-29974
https://bugzilla.mozilla.org/show_bug.cgi?id=1704843
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-29974
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
https://security.gentoo.org/glsa/202202-03
https://ubuntu.com/security/notices/USN-5011-1
https://www.mozilla.org/en-US/security/advisories/mfsa2021-28/#CVE-2021-29974
https://www.mozilla.org/security/advisories/mfsa2021-28/
ASA-202107-20 https://security.archlinux.org/ASA-202107-20
AVG-2148 https://security.archlinux.org/AVG-2148
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:*:*:*:*:*:*:*:*
CVE-2021-29974 https://nvd.nist.gov/vuln/detail/CVE-2021-29974
mfsa2021-28 https://www.mozilla.org/en-US/security/advisories/mfsa2021-28
USN-5011-1 https://usn.ubuntu.com/5011-1/
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/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:H/Au:N/C:N/I:P/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2021-29974
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:N/I:L/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2021-29974
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:N/I:L/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2021-29974
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 0.36464
EPSS Score 0.00080
Published At Dec. 17, 2024, midnight
Date Actor Action Source VulnerableCode Version
There are no relevant records.