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Vulnerability details: VCID-r395-qbnk-aaak
Vulnerability ID VCID-r395-qbnk-aaak
Aliases CVE-2021-29952
Summary When Web Render components were destructed, a race condition could have caused undefined behavior, and we presume that with enough effort may have been exploitable to run arbitrary code. This vulnerability affects Firefox < 88.0.1 and Firefox for Android < 88.1.3.
Status Published
Exploitability 0.5
Weighted Severity 9.0
Risk 4.5
Affected and Fixed Packages Package Details
Weaknesses (2)
CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
CWE-367 Time-of-check Time-of-use (TOCTOU) Race Condition
System Score Found at
generic_textual Medium http://people.canonical.com/~ubuntu-security/cve/2021/CVE-2021-29952.html
cvssv3 7.5 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-29952.json
epss 0.00220 https://api.first.org/data/v1/epss?cve=CVE-2021-29952
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epss 0.00966 https://api.first.org/data/v1/epss?cve=CVE-2021-29952
rhbs high https://bugzilla.redhat.com/show_bug.cgi?id=1961494
generic_textual Medium https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-29952
cvssv2 5.1 https://nvd.nist.gov/vuln/detail/CVE-2021-29952
cvssv3 7.5 https://nvd.nist.gov/vuln/detail/CVE-2021-29952
cvssv3.1 7.5 https://nvd.nist.gov/vuln/detail/CVE-2021-29952
archlinux High https://security.archlinux.org/AVG-1917
generic_textual Medium https://ubuntu.com/security/notices/USN-4942-1
generic_textual critical https://www.mozilla.org/en-US/security/advisories/mfsa2021-20
generic_textual Medium https://www.mozilla.org/en-US/security/advisories/mfsa2021-20/#CVE-2021-29952
Reference id Reference type URL
http://people.canonical.com/~ubuntu-security/cve/2021/CVE-2021-29952.html
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-29952.json
https://api.first.org/data/v1/epss?cve=CVE-2021-29952
https://bugzilla.mozilla.org/show_bug.cgi?id=1704227
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-29952
https://ubuntu.com/security/notices/USN-4942-1
https://www.mozilla.org/en-US/security/advisories/mfsa2021-20/#CVE-2021-29952
https://www.mozilla.org/security/advisories/mfsa2021-20/
1961494 https://bugzilla.redhat.com/show_bug.cgi?id=1961494
ASA-202105-5 https://security.archlinux.org/ASA-202105-5
AVG-1917 https://security.archlinux.org/AVG-1917
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:*:*:*:*:*:-:*:*
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-2021-29952 https://nvd.nist.gov/vuln/detail/CVE-2021-29952
mfsa2021-20 https://www.mozilla.org/en-US/security/advisories/mfsa2021-20
USN-4942-1 https://usn.ubuntu.com/4942-1/
No exploits are available.
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-29952.json
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:P/A:P Found at https://nvd.nist.gov/vuln/detail/CVE-2021-29952
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:H/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2021-29952
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:H/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2021-29952
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 0.60404
EPSS Score 0.00220
Published At Nov. 1, 2024, midnight
Date Actor Action Source VulnerableCode Version
There are no relevant records.