Out-of-bounds write in Mozilla Firefox
Memory safety bugs present in Firefox 119, Firefox ESR 115.4, and Thunderbird 115.4.
firefox security update
Released 2023-11-29 · Red Hat rating Important · View on Red Hat →
Memory safety bugs present in Firefox 119, Firefox ESR 115.4, and Thunderbird 115.4.
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.
Ownership mismanagement led to a use-after-free in ReadableByteStreams This vulnerability affects Firefox < 120, Firefox ESR < 115.5.0, and Thunderbird < 115.5.
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.
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.
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.
The black fade animation when exiting fullscreen is roughly the length of the anti-clickjacking delay on permission prompts.