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Vulnerability details: VCID-4jvv-aqt4-aaak
Vulnerability ID VCID-4jvv-aqt4-aaak
Aliases CVE-2021-23977
Summary Firefox for Android suffered from a time-of-check-time-of-use vulnerability that allowed a malicious application to read sensitive data from application directories. Note: This issue is only affected Firefox for Android. Other operating systems are unaffected. This vulnerability affects Firefox < 86.
Status Published
Exploitability 0.5
Weighted Severity 8.0
Risk 4.0
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-367 Time-of-check Time-of-use (TOCTOU) Race Condition
System Score Found at
epss 0.00150 https://api.first.org/data/v1/epss?cve=CVE-2021-23977
epss 0.00150 https://api.first.org/data/v1/epss?cve=CVE-2021-23977
epss 0.00150 https://api.first.org/data/v1/epss?cve=CVE-2021-23977
epss 0.00150 https://api.first.org/data/v1/epss?cve=CVE-2021-23977
epss 0.00150 https://api.first.org/data/v1/epss?cve=CVE-2021-23977
epss 0.00150 https://api.first.org/data/v1/epss?cve=CVE-2021-23977
epss 0.00150 https://api.first.org/data/v1/epss?cve=CVE-2021-23977
epss 0.00150 https://api.first.org/data/v1/epss?cve=CVE-2021-23977
epss 0.00150 https://api.first.org/data/v1/epss?cve=CVE-2021-23977
epss 0.00150 https://api.first.org/data/v1/epss?cve=CVE-2021-23977
epss 0.00150 https://api.first.org/data/v1/epss?cve=CVE-2021-23977
epss 0.00150 https://api.first.org/data/v1/epss?cve=CVE-2021-23977
epss 0.00195 https://api.first.org/data/v1/epss?cve=CVE-2021-23977
epss 0.00201 https://api.first.org/data/v1/epss?cve=CVE-2021-23977
epss 0.00201 https://api.first.org/data/v1/epss?cve=CVE-2021-23977
epss 0.00201 https://api.first.org/data/v1/epss?cve=CVE-2021-23977
epss 0.0028 https://api.first.org/data/v1/epss?cve=CVE-2021-23977
epss 0.0028 https://api.first.org/data/v1/epss?cve=CVE-2021-23977
epss 0.0028 https://api.first.org/data/v1/epss?cve=CVE-2021-23977
epss 0.0028 https://api.first.org/data/v1/epss?cve=CVE-2021-23977
epss 0.0028 https://api.first.org/data/v1/epss?cve=CVE-2021-23977
epss 0.0028 https://api.first.org/data/v1/epss?cve=CVE-2021-23977
epss 0.0028 https://api.first.org/data/v1/epss?cve=CVE-2021-23977
epss 0.0028 https://api.first.org/data/v1/epss?cve=CVE-2021-23977
epss 0.0028 https://api.first.org/data/v1/epss?cve=CVE-2021-23977
epss 0.0028 https://api.first.org/data/v1/epss?cve=CVE-2021-23977
epss 0.0028 https://api.first.org/data/v1/epss?cve=CVE-2021-23977
epss 0.0028 https://api.first.org/data/v1/epss?cve=CVE-2021-23977
epss 0.0028 https://api.first.org/data/v1/epss?cve=CVE-2021-23977
epss 0.0028 https://api.first.org/data/v1/epss?cve=CVE-2021-23977
epss 0.0028 https://api.first.org/data/v1/epss?cve=CVE-2021-23977
epss 0.0028 https://api.first.org/data/v1/epss?cve=CVE-2021-23977
epss 0.0028 https://api.first.org/data/v1/epss?cve=CVE-2021-23977
epss 0.0028 https://api.first.org/data/v1/epss?cve=CVE-2021-23977
epss 0.0028 https://api.first.org/data/v1/epss?cve=CVE-2021-23977
epss 0.0028 https://api.first.org/data/v1/epss?cve=CVE-2021-23977
epss 0.0028 https://api.first.org/data/v1/epss?cve=CVE-2021-23977
epss 0.0028 https://api.first.org/data/v1/epss?cve=CVE-2021-23977
epss 0.0028 https://api.first.org/data/v1/epss?cve=CVE-2021-23977
epss 0.0028 https://api.first.org/data/v1/epss?cve=CVE-2021-23977
epss 0.0028 https://api.first.org/data/v1/epss?cve=CVE-2021-23977
epss 0.0028 https://api.first.org/data/v1/epss?cve=CVE-2021-23977
epss 0.0028 https://api.first.org/data/v1/epss?cve=CVE-2021-23977
epss 0.0028 https://api.first.org/data/v1/epss?cve=CVE-2021-23977
epss 0.0028 https://api.first.org/data/v1/epss?cve=CVE-2021-23977
epss 0.0028 https://api.first.org/data/v1/epss?cve=CVE-2021-23977
epss 0.0028 https://api.first.org/data/v1/epss?cve=CVE-2021-23977
epss 0.0028 https://api.first.org/data/v1/epss?cve=CVE-2021-23977
epss 0.0028 https://api.first.org/data/v1/epss?cve=CVE-2021-23977
epss 0.0028 https://api.first.org/data/v1/epss?cve=CVE-2021-23977
epss 0.0028 https://api.first.org/data/v1/epss?cve=CVE-2021-23977
epss 0.0028 https://api.first.org/data/v1/epss?cve=CVE-2021-23977
epss 0.0028 https://api.first.org/data/v1/epss?cve=CVE-2021-23977
epss 0.0028 https://api.first.org/data/v1/epss?cve=CVE-2021-23977
epss 0.0028 https://api.first.org/data/v1/epss?cve=CVE-2021-23977
epss 0.0028 https://api.first.org/data/v1/epss?cve=CVE-2021-23977
epss 0.0028 https://api.first.org/data/v1/epss?cve=CVE-2021-23977
epss 0.0028 https://api.first.org/data/v1/epss?cve=CVE-2021-23977
epss 0.0028 https://api.first.org/data/v1/epss?cve=CVE-2021-23977
epss 0.0028 https://api.first.org/data/v1/epss?cve=CVE-2021-23977
epss 0.0028 https://api.first.org/data/v1/epss?cve=CVE-2021-23977
epss 0.0028 https://api.first.org/data/v1/epss?cve=CVE-2021-23977
epss 0.0028 https://api.first.org/data/v1/epss?cve=CVE-2021-23977
epss 0.0028 https://api.first.org/data/v1/epss?cve=CVE-2021-23977
epss 0.0028 https://api.first.org/data/v1/epss?cve=CVE-2021-23977
epss 0.0028 https://api.first.org/data/v1/epss?cve=CVE-2021-23977
epss 0.0028 https://api.first.org/data/v1/epss?cve=CVE-2021-23977
epss 0.0028 https://api.first.org/data/v1/epss?cve=CVE-2021-23977
epss 0.0028 https://api.first.org/data/v1/epss?cve=CVE-2021-23977
epss 0.0028 https://api.first.org/data/v1/epss?cve=CVE-2021-23977
epss 0.0028 https://api.first.org/data/v1/epss?cve=CVE-2021-23977
epss 0.00372 https://api.first.org/data/v1/epss?cve=CVE-2021-23977
epss 0.00372 https://api.first.org/data/v1/epss?cve=CVE-2021-23977
epss 0.00372 https://api.first.org/data/v1/epss?cve=CVE-2021-23977
epss 0.00372 https://api.first.org/data/v1/epss?cve=CVE-2021-23977
epss 0.00372 https://api.first.org/data/v1/epss?cve=CVE-2021-23977
epss 0.00372 https://api.first.org/data/v1/epss?cve=CVE-2021-23977
epss 0.00372 https://api.first.org/data/v1/epss?cve=CVE-2021-23977
epss 0.00372 https://api.first.org/data/v1/epss?cve=CVE-2021-23977
epss 0.00372 https://api.first.org/data/v1/epss?cve=CVE-2021-23977
epss 0.00372 https://api.first.org/data/v1/epss?cve=CVE-2021-23977
epss 0.00372 https://api.first.org/data/v1/epss?cve=CVE-2021-23977
epss 0.00372 https://api.first.org/data/v1/epss?cve=CVE-2021-23977
epss 0.00372 https://api.first.org/data/v1/epss?cve=CVE-2021-23977
epss 0.00372 https://api.first.org/data/v1/epss?cve=CVE-2021-23977
epss 0.00372 https://api.first.org/data/v1/epss?cve=CVE-2021-23977
epss 0.00372 https://api.first.org/data/v1/epss?cve=CVE-2021-23977
epss 0.00372 https://api.first.org/data/v1/epss?cve=CVE-2021-23977
epss 0.00372 https://api.first.org/data/v1/epss?cve=CVE-2021-23977
epss 0.00372 https://api.first.org/data/v1/epss?cve=CVE-2021-23977
epss 0.00561 https://api.first.org/data/v1/epss?cve=CVE-2021-23977
cvssv3.1 5.3 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv2 2.6 https://nvd.nist.gov/vuln/detail/CVE-2021-23977
cvssv3 5.3 https://nvd.nist.gov/vuln/detail/CVE-2021-23977
cvssv3.1 5.3 https://nvd.nist.gov/vuln/detail/CVE-2021-23977
archlinux Medium https://security.archlinux.org/AVG-1600
generic_textual high https://www.mozilla.org/en-US/security/advisories/mfsa2021-07
generic_textual Medium https://www.mozilla.org/security/advisories/mfsa2021-07/
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2021-23977
https://bugzilla.mozilla.org/show_bug.cgi?id=1684761
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
https://security.gentoo.org/glsa/202104-10
https://www.mozilla.org/security/advisories/mfsa2021-07/
AVG-1600 https://security.archlinux.org/AVG-1600
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:android:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:mozilla:firefox:*:*:*:*:*:android:*:*
CVE-2021-23977 https://nvd.nist.gov/vuln/detail/CVE-2021-23977
mfsa2021-07 https://www.mozilla.org/en-US/security/advisories/mfsa2021-07
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:H/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:H/Au:N/C:P/I:N/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2021-23977
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:H/PR:N/UI:R/S:U/C:H/I:N/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2021-23977
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:H/PR:N/UI:R/S:U/C:H/I:N/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2021-23977
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 0.51831
EPSS Score 0.00150
Published At Nov. 1, 2024, midnight
Date Actor Action Source VulnerableCode Version
There are no relevant records.