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Vulnerability details: VCID-3e24-knjk-aaas
Vulnerability ID VCID-3e24-knjk-aaas
Aliases CVE-2021-23997
Summary Due to unexpected data type conversions, a use-after-free could have occurred when interacting with the font cache. We presume that with enough effort this could have been exploited to run arbitrary code. This vulnerability affects Firefox < 88.
Status Published
Exploitability 0.5
Weighted Severity 8.0
Risk 4.0
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-681 Incorrect Conversion between Numeric Types
System Score Found at
generic_textual Medium http://people.canonical.com/~ubuntu-security/cve/2021/CVE-2021-23997.html
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epss 0.01321 https://api.first.org/data/v1/epss?cve=CVE-2021-23997
generic_textual Medium https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-23997
cvssv3.1 8.8 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv2 6.8 https://nvd.nist.gov/vuln/detail/CVE-2021-23997
cvssv3 8.8 https://nvd.nist.gov/vuln/detail/CVE-2021-23997
cvssv3.1 8.8 https://nvd.nist.gov/vuln/detail/CVE-2021-23997
archlinux High https://security.archlinux.org/AVG-1834
generic_textual Medium https://ubuntu.com/security/notices/USN-4926-1
generic_textual high https://www.mozilla.org/en-US/security/advisories/mfsa2021-16
generic_textual Medium https://www.mozilla.org/en-US/security/advisories/mfsa2021-16/#CVE-2021-23997
Reference id Reference type URL
http://people.canonical.com/~ubuntu-security/cve/2021/CVE-2021-23997.html
https://api.first.org/data/v1/epss?cve=CVE-2021-23997
https://bugzilla.mozilla.org/show_bug.cgi?id=1701942
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-23997
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
https://ubuntu.com/security/notices/USN-4926-1
https://www.mozilla.org/en-US/security/advisories/mfsa2021-16/#CVE-2021-23997
https://www.mozilla.org/security/advisories/mfsa2021-16/
ASA-202104-3 https://security.archlinux.org/ASA-202104-3
AVG-1834 https://security.archlinux.org/AVG-1834
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-2021-23997 https://nvd.nist.gov/vuln/detail/CVE-2021-23997
mfsa2021-16 https://www.mozilla.org/en-US/security/advisories/mfsa2021-16
USN-4926-1 https://usn.ubuntu.com/4926-1/
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H 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:P/A:P Found at https://nvd.nist.gov/vuln/detail/CVE-2021-23997
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:H/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2021-23997
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:H/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2021-23997
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 0.56384
EPSS Score 0.00184
Published At Nov. 1, 2024, midnight
Date Actor Action Source VulnerableCode Version
There are no relevant records.