0595f7c933
Fixes the following security issues:
1) CVE-2023-6377: X.Org server: Out-of-bounds memory write in XKB button actions
A device has XKB button actions for each button on the device. When a
logical device switch happens (e.g. moving from a touchpad to a mouse), the
server re-calculates the information available on the respective master
device (typically the Virtual Core Pointer). This re-calculation only
allocated enough memory for a single XKB action rather instead of enough for
the newly active physical device's number of button. As a result, querying
or changing the XKB button actions results in out-of-bounds memory reads and
writes.
This may lead to local privilege escalation if the server is run as root or
remote code execution (e.g. x11 over ssh).
2) CVE-2023-6478: X.Org server: Out-of-bounds memory read in
RRChangeOutputProperty and RRChangeProviderProperty
This fixes an OOB read and the resulting information disclosure.
Length calculation for the request was clipped to a 32-bit integer. With
the correct stuff->nUnits value the expected request size was truncated,
passing the REQUEST_FIXED_SIZE check.
The server then proceeded with reading at least stuff->nUnits bytes
(depending on stuff->format) from the request and stuffing whatever it finds
into the property. In the process it would also allocate at least
stuff->nUnits bytes, i.e. 4GB.
See also CVE-2022-46344 where this issue was fixed for other requests.
For more details, see the advisory:
https://lists.x.org/archives/xorg-announce/2023-December/003435.html
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
(cherry picked from commit
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| README | ||
Buildroot is a simple, efficient and easy-to-use tool to generate embedded Linux systems through cross-compilation. The documentation can be found in docs/manual. You can generate a text document with 'make manual-text' and read output/docs/manual/manual.text. Online documentation can be found at http://buildroot.org/docs.html To build and use the buildroot stuff, do the following: 1) run 'make menuconfig' 2) select the target architecture and the packages you wish to compile 3) run 'make' 4) wait while it compiles 5) find the kernel, bootloader, root filesystem, etc. in output/images You do not need to be root to build or run buildroot. Have fun! Buildroot comes with a basic configuration for a number of boards. Run 'make list-defconfigs' to view the list of provided configurations. Please feed suggestions, bug reports, insults, and bribes back to the buildroot mailing list: buildroot@buildroot.org You can also find us on #buildroot on OFTC IRC. If you would like to contribute patches, please read https://buildroot.org/manual.html#submitting-patches