8c4a015cc2
The old approach of builtin color lookup used a binary search of strings within text blocks (their start offsets defined in the color array). This could potentially lead to buffer overflow, if the requested color name far outreaches the text block (eg. same prefix as some entry near to the end, but really huge). This alone wouldn't allow remote memory readout (just comparing), but could possibly trigger page faults (sigsegv) or used as a building block for some more complex attack. OTOH, the old approach is also hard to maintain, ugly programming style: on each change, all the offset need to be carefully recounted, which is pretty error-prone. Both problems are solved by moving to simple, per-entry, char* pointers, instead of the one large text block. Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net> Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1313> |
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X Server
The X server accepts requests from client applications to create windows, which are (normally rectangular) "virtual screens" that the client program can draw into.
Windows are then composed on the actual screen by the X server (or by a separate composite manager) as directed by the window manager, which usually communicates with the user via graphical controls such as buttons and draggable titlebars and borders.
For a comprehensive overview of X Server and X Window System, consult the following article: https://en.wikipedia.org/wiki/X_server
All questions regarding this software should be directed at the Xorg mailing list:
https://lists.freedesktop.org/mailman/listinfo/xorg
The primary development code repository can be found at:
https://gitlab.freedesktop.org/xorg/xserver
For patch submission instructions, see:
https://www.x.org/wiki/Development/Documentation/SubmittingPatches
As with other projects hosted on freedesktop.org, X.Org follows its Code of Conduct, based on the Contributor Covenant. Please conduct yourself in a respectful and civilized manner when using the above mailing lists, bug trackers, etc: