a13cff2d06
Fix CVE-2021-3634: A flaw has been found in libssh in versions prior to
0.9.6. The SSH protocol keeps track of two shared secrets during the
lifetime of the session. One of them is called secret_hash and the other
session_id. Initially, both of them are the same, but after key
re-exchange, previous session_id is kept and used as an input to new
secret_hash. Historically, both of these buffers had shared length
variable, which worked as long as these buffers were same. But the key
re-exchange operation can also change the key exchange method, which can
be based on hash of different size, eventually creating "secret_hash" of
different size than the session_id has. This becomes an issue when the
session_id memory is zeroed or when it is used again during second key
re-exchange.
Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.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