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Vulnerability details: VCID-x2f5-abf4-aaap
Vulnerability ID VCID-x2f5-abf4-aaap
Aliases CVE-2021-29951
Summary The Mozilla Maintenance Service granted SERVICE_START access to BUILTIN|Users which, in a domain network, grants normal remote users access to start or stop the service. This could be used to prevent the browser update service from operating (if an attacker spammed the 'Stop' command); but also exposed attack surface in the maintenance service. *Note: This issue only affected Windows operating systems older than Win 10 build 1709. Other operating systems are unaffected.*. This vulnerability affects Thunderbird < 78.10.1, Firefox < 87, and Firefox ESR < 78.10.1.
Status Published
Exploitability 0.5
Weighted Severity 8.0
Risk 4.0
Affected and Fixed Packages Package Details
Weaknesses (2)
CWE-269 Improper Privilege Management
CWE-863 Incorrect Authorization
System Score Found at
cvssv3 6.1 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-29951.json
epss 0.00272 https://api.first.org/data/v1/epss?cve=CVE-2021-29951
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epss 0.00272 https://api.first.org/data/v1/epss?cve=CVE-2021-29951
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epss 0.00272 https://api.first.org/data/v1/epss?cve=CVE-2021-29951
epss 0.00272 https://api.first.org/data/v1/epss?cve=CVE-2021-29951
epss 0.00272 https://api.first.org/data/v1/epss?cve=CVE-2021-29951
epss 0.00272 https://api.first.org/data/v1/epss?cve=CVE-2021-29951
epss 0.00272 https://api.first.org/data/v1/epss?cve=CVE-2021-29951
epss 0.00272 https://api.first.org/data/v1/epss?cve=CVE-2021-29951
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epss 0.00468 https://api.first.org/data/v1/epss?cve=CVE-2021-29951
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epss 0.00468 https://api.first.org/data/v1/epss?cve=CVE-2021-29951
epss 0.00468 https://api.first.org/data/v1/epss?cve=CVE-2021-29951
epss 0.00468 https://api.first.org/data/v1/epss?cve=CVE-2021-29951
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epss 0.00468 https://api.first.org/data/v1/epss?cve=CVE-2021-29951
epss 0.00468 https://api.first.org/data/v1/epss?cve=CVE-2021-29951
epss 0.00468 https://api.first.org/data/v1/epss?cve=CVE-2021-29951
epss 0.00468 https://api.first.org/data/v1/epss?cve=CVE-2021-29951
epss 0.00468 https://api.first.org/data/v1/epss?cve=CVE-2021-29951
epss 0.00468 https://api.first.org/data/v1/epss?cve=CVE-2021-29951
epss 0.00468 https://api.first.org/data/v1/epss?cve=CVE-2021-29951
epss 0.00468 https://api.first.org/data/v1/epss?cve=CVE-2021-29951
epss 0.00468 https://api.first.org/data/v1/epss?cve=CVE-2021-29951
epss 0.00468 https://api.first.org/data/v1/epss?cve=CVE-2021-29951
epss 0.00468 https://api.first.org/data/v1/epss?cve=CVE-2021-29951
epss 0.00468 https://api.first.org/data/v1/epss?cve=CVE-2021-29951
epss 0.00468 https://api.first.org/data/v1/epss?cve=CVE-2021-29951
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epss 0.00468 https://api.first.org/data/v1/epss?cve=CVE-2021-29951
epss 0.00468 https://api.first.org/data/v1/epss?cve=CVE-2021-29951
epss 0.00468 https://api.first.org/data/v1/epss?cve=CVE-2021-29951
epss 0.00468 https://api.first.org/data/v1/epss?cve=CVE-2021-29951
epss 0.00468 https://api.first.org/data/v1/epss?cve=CVE-2021-29951
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epss 0.00468 https://api.first.org/data/v1/epss?cve=CVE-2021-29951
epss 0.00468 https://api.first.org/data/v1/epss?cve=CVE-2021-29951
epss 0.00468 https://api.first.org/data/v1/epss?cve=CVE-2021-29951
epss 0.00468 https://api.first.org/data/v1/epss?cve=CVE-2021-29951
epss 0.00468 https://api.first.org/data/v1/epss?cve=CVE-2021-29951
epss 0.00468 https://api.first.org/data/v1/epss?cve=CVE-2021-29951
epss 0.00468 https://api.first.org/data/v1/epss?cve=CVE-2021-29951
epss 0.00468 https://api.first.org/data/v1/epss?cve=CVE-2021-29951
epss 0.00468 https://api.first.org/data/v1/epss?cve=CVE-2021-29951
epss 0.00468 https://api.first.org/data/v1/epss?cve=CVE-2021-29951
epss 0.0062 https://api.first.org/data/v1/epss?cve=CVE-2021-29951
rhbs medium https://bugzilla.redhat.com/show_bug.cgi?id=1961505
cvssv3.1 3.3 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv2 6.4 https://nvd.nist.gov/vuln/detail/CVE-2021-29951
cvssv3 6.5 https://nvd.nist.gov/vuln/detail/CVE-2021-29951
cvssv3.1 6.5 https://nvd.nist.gov/vuln/detail/CVE-2021-29951
archlinux Medium https://security.archlinux.org/AVG-1914
generic_textual high https://www.mozilla.org/en-US/security/advisories/mfsa2021-10
generic_textual none https://www.mozilla.org/en-US/security/advisories/mfsa2021-18
generic_textual none https://www.mozilla.org/en-US/security/advisories/mfsa2021-19
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-29951.json
https://api.first.org/data/v1/epss?cve=CVE-2021-29951
https://bugzilla.mozilla.org/show_bug.cgi?id=1690062
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
https://www.mozilla.org/security/advisories/mfsa2021-10/
https://www.mozilla.org/security/advisories/mfsa2021-18/
https://www.mozilla.org/security/advisories/mfsa2021-19/
1961505 https://bugzilla.redhat.com/show_bug.cgi?id=1961505
AVG-1914 https://security.archlinux.org/AVG-1914
CVE-2021-29951 https://nvd.nist.gov/vuln/detail/CVE-2021-29951
mfsa2021-10 https://www.mozilla.org/en-US/security/advisories/mfsa2021-10
mfsa2021-18 https://www.mozilla.org/en-US/security/advisories/mfsa2021-18
mfsa2021-19 https://www.mozilla.org/en-US/security/advisories/mfsa2021-19
No exploits are available.
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-29951.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:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L 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:L/Au:N/C:P/I:P/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2021-29951
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:N/S:U/C:L/I:L/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2021-29951
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:L/I:L/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2021-29951
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 0.68463
EPSS Score 0.00272
Published At Nov. 1, 2024, midnight
Date Actor Action Source VulnerableCode Version
There are no relevant records.