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Vulnerability details: VCID-3mtv-y9yn-aaad
Vulnerability ID VCID-3mtv-y9yn-aaad
Aliases CVE-2021-29966
Summary Mozilla developers reported memory safety bugs present in Firefox 88. 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 < 89.
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-2021-29966.html
epss 0.00294 https://api.first.org/data/v1/epss?cve=CVE-2021-29966
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epss 0.00294 https://api.first.org/data/v1/epss?cve=CVE-2021-29966
epss 0.00294 https://api.first.org/data/v1/epss?cve=CVE-2021-29966
epss 0.00321 https://api.first.org/data/v1/epss?cve=CVE-2021-29966
epss 0.00321 https://api.first.org/data/v1/epss?cve=CVE-2021-29966
epss 0.00321 https://api.first.org/data/v1/epss?cve=CVE-2021-29966
epss 0.00321 https://api.first.org/data/v1/epss?cve=CVE-2021-29966
epss 0.00321 https://api.first.org/data/v1/epss?cve=CVE-2021-29966
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epss 0.00321 https://api.first.org/data/v1/epss?cve=CVE-2021-29966
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epss 0.00467 https://api.first.org/data/v1/epss?cve=CVE-2021-29966
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epss 0.00467 https://api.first.org/data/v1/epss?cve=CVE-2021-29966
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epss 0.00467 https://api.first.org/data/v1/epss?cve=CVE-2021-29966
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epss 0.00467 https://api.first.org/data/v1/epss?cve=CVE-2021-29966
epss 0.00467 https://api.first.org/data/v1/epss?cve=CVE-2021-29966
epss 0.00467 https://api.first.org/data/v1/epss?cve=CVE-2021-29966
epss 0.00467 https://api.first.org/data/v1/epss?cve=CVE-2021-29966
epss 0.00974 https://api.first.org/data/v1/epss?cve=CVE-2021-29966
generic_textual Medium https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-29966
cvssv2 6.8 https://nvd.nist.gov/vuln/detail/CVE-2021-29966
cvssv3 8.8 https://nvd.nist.gov/vuln/detail/CVE-2021-29966
cvssv3.1 8.8 https://nvd.nist.gov/vuln/detail/CVE-2021-29966
archlinux High https://security.archlinux.org/AVG-2018
generic_textual Medium https://ubuntu.com/security/notices/USN-4978-1
generic_textual high https://www.mozilla.org/en-US/security/advisories/mfsa2021-23
generic_textual Medium https://www.mozilla.org/en-US/security/advisories/mfsa2021-23/#CVE-2021-29966
Reference id Reference type URL
http://people.canonical.com/~ubuntu-security/cve/2021/CVE-2021-29966.html
https://api.first.org/data/v1/epss?cve=CVE-2021-29966
https://bugzilla.mozilla.org/buglist.cgi?bug_id=1660307%2C1686154%2C1702948%2C1708124
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-29966
https://security.gentoo.org/glsa/202107-09
https://ubuntu.com/security/notices/USN-4978-1
https://www.mozilla.org/en-US/security/advisories/mfsa2021-23/#CVE-2021-29966
https://www.mozilla.org/security/advisories/mfsa2021-23/
ASA-202106-3 https://security.archlinux.org/ASA-202106-3
AVG-2018 https://security.archlinux.org/AVG-2018
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-2021-29966 https://nvd.nist.gov/vuln/detail/CVE-2021-29966
mfsa2021-23 https://www.mozilla.org/en-US/security/advisories/mfsa2021-23
USN-4978-1 https://usn.ubuntu.com/4978-1/
No exploits are available.
Vector: AV:N/AC:M/Au:N/C:P/I:P/A:P Found at https://nvd.nist.gov/vuln/detail/CVE-2021-29966
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-2021-29966
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-2021-29966
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 0.68775
EPSS Score 0.00294
Published At Dec. 17, 2024, midnight
Date Actor Action Source VulnerableCode Version
There are no relevant records.