Specially Crafted Multipart Response Could Allow Arbitrary JavaScript Execution in Firefox
CVE-2024-9393

7.5HIGH

Key Information:

Vendor

Mozilla
Status
Firefox
Firefox Esr
Thunderbird
Vendor
CVE Published:
1 October 2024

What is CVE-2024-9393?

A vulnerability exists that enables an attacker to execute arbitrary JavaScript under the resource://pdf.js origin by sending a specially crafted multipart response. This could potentially lead to unauthorized access to cross-origin PDF content. While desktop clients limit access to 'same site' documents due to the Site Isolation feature, the risk is heightened on Android versions where full cross-origin access is possible. The vulnerability impacts various versions of Firefox and Thunderbird, making it critical for users running outdated software to take immediate action.

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Affected Version(s)

Firefox < 131

Firefox ESR < 128.3

Firefox ESR < 115.16

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1918301
https://www.mozilla.org/security/advisories/mfsa2024-46/
https://www.mozilla.org/security/advisories/mfsa2024-47/

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
High
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Masato Kinugawa
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