Mozilla Foundation Security Advisory 2024-21
Security Vulnerabilities fixed in Firefox 126
- Announced
- May 14, 2024
- Impact
- high
- Products
- Firefox
- Fixed in
-
- Firefox 126
#CVE-2024-4764: Use-after-free when audio input connected with multiple consumers
- Reporter
- Jan-Ivar Bruaroey
- Impact
- high
Description
Multiple WebRTC threads could have claimed a newly connected audio input leading to use-after-free.
References
#CVE-2024-4367: Arbitrary JavaScript execution in PDF.js
- Reporter
- Thomas Rinsma of Codean Labs
- Impact
- high
Description
A type check was missing when handling fonts in PDF.js, which would allow arbitrary JavaScript execution in the PDF.js context.
References
#CVE-2024-4765: Web application manifests could have been overwritten via hash collision
- Reporter
- Dana Keeler
- Impact
- moderate
Description
Web application manifests were stored by using an insecure MD5 hash which allowed for a hash collision to overwrite another application's manifest. This could have been exploited to run arbitrary code in another application's context.
This issue only affects Firefox for Android. Other versions of Firefox are unaffected.
References
#CVE-2024-4766: Fullscreen notification could have been obscured on Firefox for Android
- Reporter
- Hafiizh
- Impact
- moderate
Description
Different techniques existed to obscure the fullscreen notification in Firefox for Android. These could have lead to potential user confusion and spoofing attacks.
This bug only affects Firefox for Android. Other versions of Firefox are unaffected.
References
#CVE-2024-4767: IndexedDB files retained in private browsing mode
- Reporter
- Kim Do Hun via Tor Browser
- Impact
- moderate
Description
If the browser.privatebrowsing.autostart preference is enabled, IndexedDB files were not properly deleted when the window was closed. This preference is disabled by default in Firefox.
References
#CVE-2024-4768: Potential permissions request bypass via clickjacking
- Reporter
- Hafiizh
- Impact
- moderate
Description
A bug in popup notifications' interaction with WebAuthn made it easier for an attacker to trick a user into granting permissions.
References
#CVE-2024-4769: Cross-origin responses could be distinguished between script and non-script content-types
- Reporter
- Shaheen Fazim
- Impact
- moderate
Description
When importing resources using Web Workers, error messages would distinguish the difference between application/javascript responses and non-script responses. This could have been abused to learn information cross-origin.
References
#CVE-2024-4770: Use-after-free could occur when printing to PDF
- Reporter
- Irvan Kurniawan
- Impact
- moderate
Description
When saving a page to PDF, certain font styles could have led to a potential use-after-free crash.
References
#CVE-2024-4771: Failed allocation could lead to use-after-free
- Reporter
- Irvan Kurniawan
- Impact
- moderate
Description
A memory allocation check was missing which would lead to a use-after-free if the allocation failed. This could have triggered a crash or potentially be leveraged to achieve code execution.
References
#CVE-2024-4772: Use of insecure rand() function to generate nonce
- Reporter
- Hanno Böck
- Impact
- low
Description
An HTTP digest authentication nonce value was generated using rand() which could lead to predictable values.
References
#CVE-2024-4773: URL bar could be cleared after network error
- Reporter
- Islam
- Impact
- low
Description
When a network error occurred during page load, the prior content could have remained in view with a blank URL bar. This could have been used to obfuscate a spoofed web site.
References
#CVE-2024-4774: Undefined behavior in ShmemCharMapHashEntry()
- Reporter
- Ronald Crane
- Impact
- low
Description
The ShmemCharMapHashEntry() code was susceptible to potentially undefined behavior by bypassing the move semantics for one of its data members.
References
#CVE-2024-4775: Invalid memory access in the built-in profiler
- Reporter
- Lukas Bernhard
- Impact
- low
Description
An iterator stop condition was missing when handling WASM code in the built-in profiler, potentially leading to invalid memory access and undefined behavior. Note: This issue only affects the application when the profiler is running.
References
#CVE-2024-4776: Window may remain disabled after file dialog is shown in full-screen
- Reporter
- Raphael
- Impact
- low
Description
A file dialog shown while in full-screen mode could have resulted in the window remaining disabled.
References
#CVE-2024-4777: Memory safety bugs fixed in Firefox 126, Firefox ESR 115.11, and Thunderbird 115.11
- Reporter
- Daniel Holbert and the Mozilla Fuzzing Team
- Impact
- moderate
Description
Memory safety bugs present in Firefox 125, Firefox ESR 115.10, and Thunderbird 115.10. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code.
References
#CVE-2024-4778: Memory safety bugs fixed in Firefox 126
- Reporter
- Mozilla Fuzzing Team
- Impact
- moderate
Description
Memory safety bugs present in Firefox 125. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code.