Firefox: Inclusion of Web Functionality from an Untrusted Source
CVE-2024-29944 is a high-severity inclusion of web functionality from an untrusted source vulnerability in Firefox from Mozilla, with a CVSS 3.1 base score of 8.4 out of 10. It can be exploited with local access to the system by an unauthenticated attacker, without any action from a user. The record lists versions 124.0.1, 124 as the first without the flaw, so updating Firefox to one of those releases or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 4.7% chance of exploitation within 30 days, which is in the top 8.05% of all scored CVEs.
High severity with no evidence of exploitation so far.
What to do
- Update Firefox to 124.0.1 or 124, whichever matches your release line, or a later version.
- Update Firefox ESR to 115.9.1 or a later version.
- Read the advisory on mozilla.org for workarounds and exact fixed builds.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Mozilla | Firefox | before 124.0.1; before 124 | 124.0.1, 124 |
| Mozilla | Firefox ESR | before 115.9.1 | 115.9.1 |
| Debian | Debian Linux | 10.0 | Not stated |
Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- LocalThe attacker needs local access or must trick a user into running something.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- NoneNo account or login is needed.
- User interaction
- NoneNo action by a victim is required.
- Scope
- UnchangedImpact stays within the vulnerable component.
- Confidentiality
- HighAll data handled by the component can be read.
- Integrity
- HighData or code can be modified at will.
- Availability
- HighThe component can be taken down completely.
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. Scored by CISA (ADP).
Official description
An attacker was able to inject an event handler into a privileged object that would allow arbitrary JavaScript execution in the parent process. Note: This vulnerability affects Desktop Firefox only, it does not affect mobile versions of Firefox. This vulnerability affects Firefox < 124.0.1 and Firefox ESR < 115.9.1.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Inclusion of Web Functionality from an Untrusted Source
The product includes web functionality (such as a web widget) from another domain in a way that causes the functionality to operate within the domain of the product, potentially granting total access and control of the product to the untrusted source.
More Inclusion of Web Functionality from an Untrusted Source vulnerabilities (CWE-830)
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: total).
- Record last changed materially (score, affected products, status or references).
References
Other references
- openwall.com/lists/oss-security/2024/03/23/1Mailing List
- bugzilla.mozilla.org/show_bug.cgi?id=1886852Issue Tracking
- lists.debian.org/debian-lts-announce/2024/03/msg00028.htmlMailing List
Other vulnerabilities in Firefox
- 8.8 High severity
- 8.8 High severity
- 8.8 High severity
- 8.8 High severity
- 8.8 High severity
- 8.8 High severity
Recent Inclusion of Web Functionality from an Untrusted Source vulnerabilities
- 8.8 High severity
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