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Vulnerability details: VCID-zx8b-grzk-aaac
Vulnerability ID VCID-zx8b-grzk-aaac
Aliases CVE-2021-38494
Summary Mozilla developers reported memory safety bugs present in Firefox 91. 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 < 92.
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-2021-38494.html
epss 0.00276 https://api.first.org/data/v1/epss?cve=CVE-2021-38494
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epss 0.00422 https://api.first.org/data/v1/epss?cve=CVE-2021-38494
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epss 0.00422 https://api.first.org/data/v1/epss?cve=CVE-2021-38494
epss 0.00422 https://api.first.org/data/v1/epss?cve=CVE-2021-38494
epss 0.00422 https://api.first.org/data/v1/epss?cve=CVE-2021-38494
epss 0.00422 https://api.first.org/data/v1/epss?cve=CVE-2021-38494
epss 0.00881 https://api.first.org/data/v1/epss?cve=CVE-2021-38494
generic_textual Medium https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-38494
cvssv2 6.8 https://nvd.nist.gov/vuln/detail/CVE-2021-38494
cvssv3 8.8 https://nvd.nist.gov/vuln/detail/CVE-2021-38494
cvssv3.1 8.8 https://nvd.nist.gov/vuln/detail/CVE-2021-38494
archlinux High https://security.archlinux.org/AVG-2350
generic_textual Medium https://ubuntu.com/security/notices/USN-5074-1
generic_textual high https://www.mozilla.org/en-US/security/advisories/mfsa2021-38
generic_textual Medium https://www.mozilla.org/en-US/security/advisories/mfsa2021-38/#CVE-2021-38494
Reference id Reference type URL
http://people.canonical.com/~ubuntu-security/cve/2021/CVE-2021-38494.html
https://api.first.org/data/v1/epss?cve=CVE-2021-38494
https://bugzilla.mozilla.org/buglist.cgi?bug_id=1723920%2C1725638
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-38494
https://ubuntu.com/security/notices/USN-5074-1
https://www.mozilla.org/en-US/security/advisories/mfsa2021-38/#CVE-2021-38494
https://www.mozilla.org/security/advisories/mfsa2021-38/
ASA-202109-2 https://security.archlinux.org/ASA-202109-2
AVG-2350 https://security.archlinux.org/AVG-2350
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-2021-38494 https://nvd.nist.gov/vuln/detail/CVE-2021-38494
mfsa2021-38 https://www.mozilla.org/en-US/security/advisories/mfsa2021-38
USN-5074-1 https://usn.ubuntu.com/5074-1/
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-2021-38494
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-2021-38494
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-2021-38494
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 0.68689
EPSS Score 0.00276
Published At Nov. 1, 2024, midnight
Date Actor Action Source VulnerableCode Version
There are no relevant records.