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Vulnerability details: VCID-zzw3-4f5h-aaac
Vulnerability ID VCID-zzw3-4f5h-aaac
Aliases CVE-2021-29990
Summary Mozilla developers and community members reported memory safety bugs present in Firefox 90. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 91.
Status Published
Exploitability 0.5
Weighted Severity 8.0
Risk 4.0
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-787 Out-of-bounds Write
System Score Found at
generic_textual Medium http://people.canonical.com/~ubuntu-security/cve/2021/CVE-2021-29990.html
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generic_textual Medium https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-29990
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-2021-29990
cvssv3 8.8 https://nvd.nist.gov/vuln/detail/CVE-2021-29990
cvssv3.1 8.8 https://nvd.nist.gov/vuln/detail/CVE-2021-29990
archlinux High https://security.archlinux.org/AVG-2269
generic_textual Medium https://ubuntu.com/security/notices/USN-5037-1
generic_textual high https://www.mozilla.org/en-US/security/advisories/mfsa2021-33
generic_textual Medium https://www.mozilla.org/en-US/security/advisories/mfsa2021-33/#CVE-2021-29990
Reference id Reference type URL
http://people.canonical.com/~ubuntu-security/cve/2021/CVE-2021-29990.html
https://api.first.org/data/v1/epss?cve=CVE-2021-29990
https://bugzilla.mozilla.org/buglist.cgi?bug_id=1544190%2C1716481%2C1717778%2C1719319%2C1722073
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-29990
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-5037-1
https://www.mozilla.org/en-US/security/advisories/mfsa2021-33/#CVE-2021-29990
https://www.mozilla.org/security/advisories/mfsa2021-33/
ASA-202108-14 https://security.archlinux.org/ASA-202108-14
AVG-2269 https://security.archlinux.org/AVG-2269
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-2021-29990 https://nvd.nist.gov/vuln/detail/CVE-2021-29990
mfsa2021-33 https://www.mozilla.org/en-US/security/advisories/mfsa2021-33
USN-5037-1 https://usn.ubuntu.com/5037-1/
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-2021-29990
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-2021-29990
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-2021-29990
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 0.42632
EPSS Score 0.00227
Published At March 28, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
There are no relevant records.