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Vulnerability details: VCID-pnme-8qav-aaaq
Vulnerability ID VCID-pnme-8qav-aaaq
Aliases CVE-2021-4127
Summary An out of date graphics library (Angle) likely contained vulnerabilities that could potentially be exploited. This vulnerability affects Thunderbird < 78.9 and Firefox ESR < 78.9.
Status Published
Exploitability 0.5
Weighted Severity 8.8
Risk 4.4
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer
System Score Found at
rhas Important https://access.redhat.com/errata/RHSA-2021:0989
rhas Important https://access.redhat.com/errata/RHSA-2021:0990
rhas Important https://access.redhat.com/errata/RHSA-2021:0991
rhas Important https://access.redhat.com/errata/RHSA-2021:0992
rhas Important https://access.redhat.com/errata/RHSA-2021:0993
rhas Important https://access.redhat.com/errata/RHSA-2021:0994
rhas Important https://access.redhat.com/errata/RHSA-2021:0995
rhas Important https://access.redhat.com/errata/RHSA-2021:0996
cvssv3 9.8 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-4127.json
epss 0.0024 https://api.first.org/data/v1/epss?cve=CVE-2021-4127
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epss 0.0024 https://api.first.org/data/v1/epss?cve=CVE-2021-4127
epss 0.0024 https://api.first.org/data/v1/epss?cve=CVE-2021-4127
epss 0.0024 https://api.first.org/data/v1/epss?cve=CVE-2021-4127
epss 0.0024 https://api.first.org/data/v1/epss?cve=CVE-2021-4127
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epss 0.0024 https://api.first.org/data/v1/epss?cve=CVE-2021-4127
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epss 0.0024 https://api.first.org/data/v1/epss?cve=CVE-2021-4127
epss 0.0024 https://api.first.org/data/v1/epss?cve=CVE-2021-4127
epss 0.0024 https://api.first.org/data/v1/epss?cve=CVE-2021-4127
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epss 0.0024 https://api.first.org/data/v1/epss?cve=CVE-2021-4127
epss 0.0024 https://api.first.org/data/v1/epss?cve=CVE-2021-4127
epss 0.0024 https://api.first.org/data/v1/epss?cve=CVE-2021-4127
epss 0.0024 https://api.first.org/data/v1/epss?cve=CVE-2021-4127
epss 0.0024 https://api.first.org/data/v1/epss?cve=CVE-2021-4127
epss 0.0024 https://api.first.org/data/v1/epss?cve=CVE-2021-4127
epss 0.0024 https://api.first.org/data/v1/epss?cve=CVE-2021-4127
epss 0.0024 https://api.first.org/data/v1/epss?cve=CVE-2021-4127
epss 0.0024 https://api.first.org/data/v1/epss?cve=CVE-2021-4127
epss 0.0024 https://api.first.org/data/v1/epss?cve=CVE-2021-4127
epss 0.0024 https://api.first.org/data/v1/epss?cve=CVE-2021-4127
epss 0.0024 https://api.first.org/data/v1/epss?cve=CVE-2021-4127
epss 0.0024 https://api.first.org/data/v1/epss?cve=CVE-2021-4127
epss 0.0024 https://api.first.org/data/v1/epss?cve=CVE-2021-4127
epss 0.0024 https://api.first.org/data/v1/epss?cve=CVE-2021-4127
epss 0.0024 https://api.first.org/data/v1/epss?cve=CVE-2021-4127
epss 0.0024 https://api.first.org/data/v1/epss?cve=CVE-2021-4127
epss 0.0024 https://api.first.org/data/v1/epss?cve=CVE-2021-4127
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epss 0.0024 https://api.first.org/data/v1/epss?cve=CVE-2021-4127
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epss 0.0024 https://api.first.org/data/v1/epss?cve=CVE-2021-4127
epss 0.00257 https://api.first.org/data/v1/epss?cve=CVE-2021-4127
epss 0.00257 https://api.first.org/data/v1/epss?cve=CVE-2021-4127
epss 0.00257 https://api.first.org/data/v1/epss?cve=CVE-2021-4127
epss 0.00257 https://api.first.org/data/v1/epss?cve=CVE-2021-4127
epss 0.00257 https://api.first.org/data/v1/epss?cve=CVE-2021-4127
epss 0.00257 https://api.first.org/data/v1/epss?cve=CVE-2021-4127
epss 0.00257 https://api.first.org/data/v1/epss?cve=CVE-2021-4127
epss 0.00257 https://api.first.org/data/v1/epss?cve=CVE-2021-4127
epss 0.00257 https://api.first.org/data/v1/epss?cve=CVE-2021-4127
epss 0.00257 https://api.first.org/data/v1/epss?cve=CVE-2021-4127
epss 0.00257 https://api.first.org/data/v1/epss?cve=CVE-2021-4127
epss 0.00257 https://api.first.org/data/v1/epss?cve=CVE-2021-4127
epss 0.00257 https://api.first.org/data/v1/epss?cve=CVE-2021-4127
epss 0.00257 https://api.first.org/data/v1/epss?cve=CVE-2021-4127
epss 0.00257 https://api.first.org/data/v1/epss?cve=CVE-2021-4127
epss 0.00257 https://api.first.org/data/v1/epss?cve=CVE-2021-4127
epss 0.00726 https://api.first.org/data/v1/epss?cve=CVE-2021-4127
cvssv3.1 9.8 https://bugzilla.mozilla.org/show_bug.cgi?id=1691547
ssvc Track https://bugzilla.mozilla.org/show_bug.cgi?id=1691547
generic_textual Medium https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-23981
generic_textual Medium https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-23982
generic_textual Medium https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-23984
generic_textual Medium https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-23987
generic_textual Low https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-29950
cvssv3 9.8 https://nvd.nist.gov/vuln/detail/CVE-2021-4127
cvssv3.1 9.8 https://nvd.nist.gov/vuln/detail/CVE-2021-4127
generic_textual high https://www.mozilla.org/en-US/security/advisories/mfsa2021-11
generic_textual high https://www.mozilla.org/en-US/security/advisories/mfsa2021-12
cvssv3.1 9.8 https://www.mozilla.org/security/advisories/mfsa2021-11/
ssvc Track https://www.mozilla.org/security/advisories/mfsa2021-11/
cvssv3.1 9.8 https://www.mozilla.org/security/advisories/mfsa2021-12/
ssvc Track https://www.mozilla.org/security/advisories/mfsa2021-12/
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-4127.json
https://api.first.org/data/v1/epss?cve=CVE-2021-4127
https://bugzilla.mozilla.org/show_bug.cgi?id=1691547
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-23981
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-23982
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-23984
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-23987
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-29950
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-29955
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-4127
https://www.mozilla.org/security/advisories/mfsa2021-11/
https://www.mozilla.org/security/advisories/mfsa2021-12/
1942784 https://bugzilla.redhat.com/show_bug.cgi?id=1942784
cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*
CVE-2021-4127 https://nvd.nist.gov/vuln/detail/CVE-2021-4127
mfsa2021-11 https://www.mozilla.org/en-US/security/advisories/mfsa2021-11
mfsa2021-12 https://www.mozilla.org/en-US/security/advisories/mfsa2021-12
RHSA-2021:0989 https://access.redhat.com/errata/RHSA-2021:0989
RHSA-2021:0990 https://access.redhat.com/errata/RHSA-2021:0990
RHSA-2021:0991 https://access.redhat.com/errata/RHSA-2021:0991
RHSA-2021:0992 https://access.redhat.com/errata/RHSA-2021:0992
RHSA-2021:0993 https://access.redhat.com/errata/RHSA-2021:0993
RHSA-2021:0994 https://access.redhat.com/errata/RHSA-2021:0994
RHSA-2021:0995 https://access.redhat.com/errata/RHSA-2021:0995
RHSA-2021:0996 https://access.redhat.com/errata/RHSA-2021:0996
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-4127.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: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Found at https://bugzilla.mozilla.org/show_bug.cgi?id=1691547
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: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2025-04-16T15:35:14Z/ Found at https://bugzilla.mozilla.org/show_bug.cgi?id=1691547
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2021-4127
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:N/S:U/C:H/I:H/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2021-4127
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:N/S:U/C:H/I:H/A:H Found at https://www.mozilla.org/security/advisories/mfsa2021-11/
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: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2025-04-16T15:35:14Z/ Found at https://www.mozilla.org/security/advisories/mfsa2021-11/
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Found at https://www.mozilla.org/security/advisories/mfsa2021-12/
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: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2025-04-16T15:35:14Z/ Found at https://www.mozilla.org/security/advisories/mfsa2021-12/
Exploit Prediction Scoring System (EPSS)
Percentile 0.44251
EPSS Score 0.0024
Published At March 28, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
There are no relevant records.