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Vulnerability details: VCID-kbwf-dkbm-aaaa
Vulnerability ID VCID-kbwf-dkbm-aaaa
Aliases CVE-2021-29972
Summary A use-after-free vulnerability was found via testing, and traced to an out-of-date Cairo library. Updating the library resolved the issue, and may have remediated other, unknown security vulnerabilities as well. This vulnerability affects Firefox < 90.
Status Published
Exploitability 0.5
Weighted Severity 8.0
Risk 4.0
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-416 Use After Free
System Score Found at
generic_textual Medium http://people.canonical.com/~ubuntu-security/cve/2021/CVE-2021-29972.html
epss 0.00291 https://api.first.org/data/v1/epss?cve=CVE-2021-29972
epss 0.00291 https://api.first.org/data/v1/epss?cve=CVE-2021-29972
epss 0.00291 https://api.first.org/data/v1/epss?cve=CVE-2021-29972
epss 0.00291 https://api.first.org/data/v1/epss?cve=CVE-2021-29972
epss 0.0034 https://api.first.org/data/v1/epss?cve=CVE-2021-29972
epss 0.0034 https://api.first.org/data/v1/epss?cve=CVE-2021-29972
epss 0.0034 https://api.first.org/data/v1/epss?cve=CVE-2021-29972
epss 0.0034 https://api.first.org/data/v1/epss?cve=CVE-2021-29972
epss 0.0034 https://api.first.org/data/v1/epss?cve=CVE-2021-29972
epss 0.0034 https://api.first.org/data/v1/epss?cve=CVE-2021-29972
epss 0.0034 https://api.first.org/data/v1/epss?cve=CVE-2021-29972
epss 0.0034 https://api.first.org/data/v1/epss?cve=CVE-2021-29972
epss 0.0034 https://api.first.org/data/v1/epss?cve=CVE-2021-29972
epss 0.00396 https://api.first.org/data/v1/epss?cve=CVE-2021-29972
epss 0.00396 https://api.first.org/data/v1/epss?cve=CVE-2021-29972
epss 0.00396 https://api.first.org/data/v1/epss?cve=CVE-2021-29972
epss 0.00396 https://api.first.org/data/v1/epss?cve=CVE-2021-29972
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epss 0.00422 https://api.first.org/data/v1/epss?cve=CVE-2021-29972
epss 0.00422 https://api.first.org/data/v1/epss?cve=CVE-2021-29972
epss 0.00422 https://api.first.org/data/v1/epss?cve=CVE-2021-29972
epss 0.00467 https://api.first.org/data/v1/epss?cve=CVE-2021-29972
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epss 0.00467 https://api.first.org/data/v1/epss?cve=CVE-2021-29972
epss 0.00467 https://api.first.org/data/v1/epss?cve=CVE-2021-29972
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epss 0.00467 https://api.first.org/data/v1/epss?cve=CVE-2021-29972
epss 0.00467 https://api.first.org/data/v1/epss?cve=CVE-2021-29972
epss 0.00467 https://api.first.org/data/v1/epss?cve=CVE-2021-29972
epss 0.00467 https://api.first.org/data/v1/epss?cve=CVE-2021-29972
epss 0.00467 https://api.first.org/data/v1/epss?cve=CVE-2021-29972
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epss 0.00467 https://api.first.org/data/v1/epss?cve=CVE-2021-29972
epss 0.00467 https://api.first.org/data/v1/epss?cve=CVE-2021-29972
epss 0.00467 https://api.first.org/data/v1/epss?cve=CVE-2021-29972
epss 0.00467 https://api.first.org/data/v1/epss?cve=CVE-2021-29972
epss 0.00467 https://api.first.org/data/v1/epss?cve=CVE-2021-29972
epss 0.00467 https://api.first.org/data/v1/epss?cve=CVE-2021-29972
epss 0.00467 https://api.first.org/data/v1/epss?cve=CVE-2021-29972
epss 0.00467 https://api.first.org/data/v1/epss?cve=CVE-2021-29972
epss 0.00467 https://api.first.org/data/v1/epss?cve=CVE-2021-29972
epss 0.00467 https://api.first.org/data/v1/epss?cve=CVE-2021-29972
epss 0.00467 https://api.first.org/data/v1/epss?cve=CVE-2021-29972
epss 0.00467 https://api.first.org/data/v1/epss?cve=CVE-2021-29972
epss 0.00467 https://api.first.org/data/v1/epss?cve=CVE-2021-29972
epss 0.00467 https://api.first.org/data/v1/epss?cve=CVE-2021-29972
epss 0.00467 https://api.first.org/data/v1/epss?cve=CVE-2021-29972
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epss 0.00467 https://api.first.org/data/v1/epss?cve=CVE-2021-29972
epss 0.00467 https://api.first.org/data/v1/epss?cve=CVE-2021-29972
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epss 0.00467 https://api.first.org/data/v1/epss?cve=CVE-2021-29972
epss 0.00467 https://api.first.org/data/v1/epss?cve=CVE-2021-29972
epss 0.00467 https://api.first.org/data/v1/epss?cve=CVE-2021-29972
epss 0.0047 https://api.first.org/data/v1/epss?cve=CVE-2021-29972
epss 0.0047 https://api.first.org/data/v1/epss?cve=CVE-2021-29972
epss 0.0047 https://api.first.org/data/v1/epss?cve=CVE-2021-29972
epss 0.0047 https://api.first.org/data/v1/epss?cve=CVE-2021-29972
epss 0.0047 https://api.first.org/data/v1/epss?cve=CVE-2021-29972
epss 0.0047 https://api.first.org/data/v1/epss?cve=CVE-2021-29972
epss 0.0047 https://api.first.org/data/v1/epss?cve=CVE-2021-29972
epss 0.0047 https://api.first.org/data/v1/epss?cve=CVE-2021-29972
epss 0.00511 https://api.first.org/data/v1/epss?cve=CVE-2021-29972
epss 0.00541 https://api.first.org/data/v1/epss?cve=CVE-2021-29972
epss 0.00541 https://api.first.org/data/v1/epss?cve=CVE-2021-29972
epss 0.00541 https://api.first.org/data/v1/epss?cve=CVE-2021-29972
epss 0.00541 https://api.first.org/data/v1/epss?cve=CVE-2021-29972
generic_textual Medium https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-29972
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-2021-29972
cvssv3 8.8 https://nvd.nist.gov/vuln/detail/CVE-2021-29972
cvssv3.1 8.8 https://nvd.nist.gov/vuln/detail/CVE-2021-29972
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-2021-29972
Reference id Reference type URL
http://people.canonical.com/~ubuntu-security/cve/2021/CVE-2021-29972.html
https://api.first.org/data/v1/epss?cve=CVE-2021-29972
https://bugzilla.mozilla.org/show_bug.cgi?id=1696816
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-29972
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-2021-29972
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-2021-29972 https://nvd.nist.gov/vuln/detail/CVE-2021-29972
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: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-2021-29972
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-2021-29972
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-2021-29972
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 0.49596
EPSS Score 0.00291
Published At March 28, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
There are no relevant records.