Mozilla Foundation Security Advisory 2023-54
Security Vulnerabilities fixed in Firefox ESR 115.6
- Announced
- December 19, 2023
- Impact
- high
- Products
- Firefox ESR
- Fixed in
-
- Firefox ESR 115.6
#CVE-2023-6856: Heap-buffer-overflow affecting WebGL DrawElementsInstanced method with Mesa VM driver
- Reporter
- DoHyun Lee
- Impact
- high
Description
The WebGL DrawElementsInstanced method was susceptible to a heap buffer overflow when used on systems with the Mesa VM driver. This issue could allow an attacker to perform remote code execution and sandbox escape.
References
#CVE-2023-6865: Potential exposure of uninitialized data in EncryptingOutputStream
- Reporter
- Jan Varga
- Impact
- high
Description
EncryptingOutputStream was susceptible to exposing uninitialized data. This issue could only be abused in order to write data to a local disk which may have implications for private browsing mode.
References
#CVE-2023-6857: Symlinks may resolve to smaller than expected buffers
- Reporter
- Jed Davis
- Impact
- moderate
Description
When resolving a symlink, a race may occur where the buffer passed to readlink may actually be smaller than necessary.
This bug only affects Firefox on Unix-based operating systems (Android, Linux, MacOS). Windows is unaffected.
References
#CVE-2023-6858: Heap buffer overflow in nsTextFragment
- Reporter
- Irvan Kurniawan
- Impact
- moderate
Description
Firefox was susceptible to a heap buffer overflow in nsTextFragment due to insufficient OOM handling.
References
#CVE-2023-6859: Use-after-free in PR_GetIdentitiesLayer
- Reporter
- Irvan Kurniawan
- Impact
- moderate
Description
A use-after-free condition affected TLS socket creation when under memory pressure.
References
#CVE-2023-6860: Potential sandbox escape due to VideoBridge lack of texture validation
- Reporter
- Andrew Osmond
- Impact
- moderate
Description
The VideoBridge allowed any content process to use textures produced by remote decoders. This could be abused to escape the sandbox.
References
#CVE-2023-6867: Clickjacking permission prompts using the popup transition
- Reporter
- Hafiizh
- Impact
- moderate
Description
The timing of a button click causing a popup to disappear was approximately the same length as the anti-clickjacking delay on permission prompts. It was possible to use this fact to surprise users by luring them to click where the permission grant button would be about to appear.
References
#CVE-2023-6861: Heap buffer overflow affected nsWindow::PickerOpen(void) in headless mode
- Reporter
- Yangkang of 360 ATA Team
- Impact
- moderate
Description
The nsWindow::PickerOpen(void) method was susceptible to a heap buffer overflow when running in headless mode.
References
#CVE-2023-6862: Use-after-free in nsDNSService
- Reporter
- Randell Jesup
- Impact
- moderate
Description
A use-after-free was identified in the nsDNSService::Init. This issue appears to manifest rarely during start-up.
References
#CVE-2023-6863: Undefined behavior in ShutdownObserver()
- Reporter
- Ronald Crane
- Impact
- low
Description
The ShutdownObserver() was susceptible to potentially undefined behavior due to its reliance on a dynamic type that lacked a virtual destructor.
References
#CVE-2023-6864: Memory safety bugs fixed in Firefox 121, Firefox ESR 115.6, and Thunderbird 115.6
- Reporter
- Andrew McCreight, Karl Tomlinson, Valentin Gosu, Randell Jesup, Yury Delendik, and the Mozilla Fuzzing Team
- Impact
- high
Description
Memory safety bugs present in Firefox 120, Firefox ESR 115.5, and Thunderbird 115.5. 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.