Home/CVE/Firefox normally asks for confirmation before asking the operating system to find an application to handle a scheme that
CVE

CVE-2024-8383

Firefox normally asks for confirmation before asking the operating system to find an application to handle a scheme that

Firefox normally asks for confirmation before asking the operating system to find an application to handle a scheme that the browser does not support. It did not ask before doing so for the Usenet-related schemes news: and snews:. Since most operating systems don't have a trusted newsreader installed by default, an unscrupulous program that the user downloaded could register itself as a handler.

The website that served the application download could then launch that application at will. This vulnerability affects Firefox < 130, Firefox ESR < 128.2, and Firefox ESR < 115.15.

HIGH · CVSS 7.5 EPSS 0.00223
Schedule remediation
  • SSVC automatable: yes - attacks can be scripted at scale
  • CVSS base score ≥ 7.0
Sigma rules1 YARA rules0
⬡

Weakness Classification

CWE-1188Initialization of a Resource with an Insecure Default
▤

Affected Products & Versions

3
mozilla firefox< 130.0
mozilla firefox esr< 115.15
mozilla firefox esr>= 128.0 and < 128.2
◈

Sigma Hunt Rules

1
Exact rules name this CVE ID. Product rules name an affected product in their title. Related rules cover techniques used by actors who exploited this CVE. Showing the most relevant matches; the complete related set is on the full drill-down.
producthighSQLite Firefox Profile Data DB Access
▣

Scoring & Timeline

7.5
HIGH · CVSS v3.1 · security@mozilla.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD03 Sep 2024 · 01:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
yes
Technical impact
partial
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
⚑

Vendor Advisories

16
suse-csafopenSUSE-SU-2024:14572-1
suse-csafopenSUSE-SU-2024:14369-1
suse-csafopenSUSE-SU-2024:14358-1
rhsaRHSA-2024:6892Important
rhsaRHSA-2024:6782Important
🔗

References & Sources

6
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://bugzilla.mozilla.org/show_bug.cgi?id=1908496Issue TrackingPermissions Required
https://www.mozilla.org/security/advisories/mfsa2024-39/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2024-40/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2024-41/Vendor Advisory
https://lists.debian.org/debian-lts-announce/2024/09/msg00012.html
https://lists.debian.org/debian-lts-announce/2024/09/msg00025.html
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