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Vulnerability details: VCID-1ra4-4uwm-aaas
Vulnerability ID VCID-1ra4-4uwm-aaas
Aliases CVE-2021-23979
Summary Mozilla developers reported memory safety bugs present in Firefox 85. 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 < 86.
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-2021-23979.html
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epss 0.01047 https://api.first.org/data/v1/epss?cve=CVE-2021-23979
generic_textual Medium https://bugzilla.mozilla.org/buglist.cgi?bug_id=1663222%2C1666607%2C1672120%2C1678463%2C1678927%2C1679560%2C1681297%2C1681684%2C1683490%2C1684377%2C1684902
generic_textual Medium https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-23979
cvssv3.1 8.1 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv2 6.8 https://nvd.nist.gov/vuln/detail/CVE-2021-23979
cvssv3 8.8 https://nvd.nist.gov/vuln/detail/CVE-2021-23979
cvssv3.1 8.8 https://nvd.nist.gov/vuln/detail/CVE-2021-23979
archlinux High https://security.archlinux.org/AVG-1599
generic_textual Medium https://ubuntu.com/security/notices/USN-4756-1
generic_textual high https://www.mozilla.org/en-US/security/advisories/mfsa2021-07
generic_textual Medium https://www.mozilla.org/en-US/security/advisories/mfsa2021-07/#CVE-2021-23979
generic_textual Medium https://www.mozilla.org/security/advisories/mfsa2021-07/
Reference id Reference type URL
http://people.canonical.com/~ubuntu-security/cve/2021/CVE-2021-23979.html
https://api.first.org/data/v1/epss?cve=CVE-2021-23979
https://bugzilla.mozilla.org/buglist.cgi?bug_id=1663222%2C1666607%2C1672120%2C1678463%2C1678927%2C1679560%2C1681297%2C1681684%2C1683490%2C1684377%2C1684902
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-23979
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
https://ubuntu.com/security/notices/USN-4756-1
https://www.mozilla.org/en-US/security/advisories/mfsa2021-07/#CVE-2021-23979
https://www.mozilla.org/security/advisories/mfsa2021-07/
AVG-1599 https://security.archlinux.org/AVG-1599
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-2021-23979 https://nvd.nist.gov/vuln/detail/CVE-2021-23979
mfsa2021-07 https://www.mozilla.org/en-US/security/advisories/mfsa2021-07
USN-4756-1 https://usn.ubuntu.com/4756-1/
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/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-2021-23979
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-2021-23979
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-2021-23979
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 0.56267
EPSS Score 0.00183
Published At Nov. 1, 2024, midnight
Date Actor Action Source VulnerableCode Version
There are no relevant records.