Mozilla Foundation Security Advisory 2023-50
Security Vulnerabilities fixed in Firefox ESR 115.5.0
- Announced
- November 21, 2023
- Impact
- high
- Products
- Firefox ESR
- Fixed in
-
- Firefox ESR 115.5
#CVE-2023-6204: Out-of-bound memory access in WebGL2 blitFramebuffer
- Reporter
- JSec of Hayyim Security
- Impact
- high
Description
On some systems—depending on the graphics settings and drivers—it was possible to force an out-of-bounds read and leak memory data into the images created on the canvas element.
References
#CVE-2023-6205: Use-after-free in MessagePort::Entangled
- Reporter
- Yangkang of 360 ATA Team
- Impact
- high
Description
It was possible to cause the use of a MessagePort after it had already been freed, which could potentially have led to an exploitable crash.
References
#CVE-2023-6206: Clickjacking permission prompts using the fullscreen transition
- Reporter
- Hafiizh
- Impact
- high
Description
The black fade animation when exiting fullscreen is roughly the length of 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-2023-6207: Use-after-free in ReadableByteStreamQueueEntry::Buffer
- Reporter
- Yangkang of 360 ATA Team
- Impact
- high
Description
Ownership mismanagement led to a use-after-free in ReadableByteStreams
References
#CVE-2023-6208: Using Selection API would copy contents into X11 primary selection.
- Reporter
- turistu
- Impact
- moderate
Description
When using X11, text selected by the page using the Selection API was erroneously copied into the primary selection, a temporary storage not unlike the clipboard.
This bug only affects Firefox on X11. Other systems are unaffected.
References
#CVE-2023-6209: Incorrect parsing of relative URLs starting with "///"
- Reporter
- Rachmat Abdul Rokhim
- Impact
- moderate
Description
Relative URLs starting with three slashes were incorrectly parsed, and a path-traversal "/../" part in the path could be used to override the specified host. This could contribute to security problems in web sites.
References
#CVE-2023-6212: Memory safety bugs fixed in Firefox 120, Firefox ESR 115.5, and Thunderbird 115.5
- Reporter
- Mozilla Developers
- Impact
- high
Description
Memory safety bugs present in Firefox 119, Firefox ESR 115.4, and Thunderbird 115.4. 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.