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Vulnerability details: VCID-azyp-xzh7-aaam
Vulnerability ID VCID-azyp-xzh7-aaam
Aliases CVE-2021-29964
Summary A locally-installed hostile program could send `WM_COPYDATA` messages that Firefox would process incorrectly, leading to an out-of-bounds read. *This bug only affects Firefox on Windows. Other operating systems are unaffected.*. This vulnerability affects Thunderbird < 78.11, Firefox < 89, and Firefox ESR < 78.11.
Status Published
Exploitability 0.5
Weighted Severity 8.0
Risk 4.0
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-125 Out-of-bounds Read
System Score Found at
cvssv3 7.1 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-29964.json
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epss 0.00961 https://api.first.org/data/v1/epss?cve=CVE-2021-29964
rhbs medium https://bugzilla.redhat.com/show_bug.cgi?id=1966830
cvssv2 5.8 https://nvd.nist.gov/vuln/detail/CVE-2021-29964
cvssv3 7.1 https://nvd.nist.gov/vuln/detail/CVE-2021-29964
cvssv3.1 7.1 https://nvd.nist.gov/vuln/detail/CVE-2021-29964
archlinux High https://security.archlinux.org/AVG-2019
generic_textual high https://www.mozilla.org/en-US/security/advisories/mfsa2021-23
generic_textual none https://www.mozilla.org/en-US/security/advisories/mfsa2021-24
generic_textual none https://www.mozilla.org/en-US/security/advisories/mfsa2021-26
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-29964.json
https://api.first.org/data/v1/epss?cve=CVE-2021-29964
https://bugzilla.mozilla.org/show_bug.cgi?id=1706501
https://www.mozilla.org/security/advisories/mfsa2021-23/
https://www.mozilla.org/security/advisories/mfsa2021-24/
https://www.mozilla.org/security/advisories/mfsa2021-26/
1966830 https://bugzilla.redhat.com/show_bug.cgi?id=1966830
AVG-2019 https://security.archlinux.org/AVG-2019
CVE-2021-29964 https://nvd.nist.gov/vuln/detail/CVE-2021-29964
mfsa2021-23 https://www.mozilla.org/en-US/security/advisories/mfsa2021-23
mfsa2021-24 https://www.mozilla.org/en-US/security/advisories/mfsa2021-24
mfsa2021-26 https://www.mozilla.org/en-US/security/advisories/mfsa2021-26
No exploits are available.
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-29964.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:M/Au:N/C:P/I:N/A:P Found at https://nvd.nist.gov/vuln/detail/CVE-2021-29964
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:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2021-29964
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:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2021-29964
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 0.35378
EPSS Score 0.00080
Published At Nov. 1, 2024, midnight
Date Actor Action Source VulnerableCode Version
There are no relevant records.