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2014-01-26 - (djm) [configure.ac sandbox-capsicum.c sandbox-rlimit.c] DisableDamien Miller
RLIMIT_NOFILE pseudo-sandbox on FreeBSD. In some configurations, libc will attempt to open additional file descriptors for crypto offload and crash if they cannot be opened.
2014-01-17 - (djm) [Makefile.in configure.ac sandbox-capsicum.c sandbox-darwin.c]Damien Miller
[sandbox-null.c sandbox-rlimit.c sandbox-seccomp-filter.c] [sandbox-systrace.c ssh-sandbox.h sshd.c] Support preauth sandboxing using the Capsicum API introduced in FreeBSD 10. Patch by Dag-Erling Smorgrav, updated by Loganaden Velvindron @ AfriNIC; ok dtucker@
2012-07-03 - (dtucker) [configure.ac sandbox-rlimit.c] Test whether or notDarren Tucker
setrlimit(RLIMIT_FSIZE, rl_zero) and skip it if it's not supported. Its benefit is minor, so it's not worth disabling the sandbox if it doesn't work.
2011-06-23 - djm@cvs.openbsd.org 2011/06/23 09:34:13Damien Miller
[sshd.c ssh-sandbox.h sandbox.h sandbox-rlimit.c sandbox-systrace.c] [sandbox-null.c] rename sandbox.h => ssh-sandbox.h to make things easier for portable
2011-06-23 - djm@cvs.openbsd.org 2011/06/22 21:57:01Damien Miller
[servconf.c servconf.h sshd.c sshd_config.5 sandbox-rlimit.c] [sandbox-systrace.c sandbox.h configure.ac Makefile.in] introduce sandboxing of the pre-auth privsep child using systrace(4). This introduces a new "UsePrivilegeSeparation=sandbox" option for sshd_config that applies mandatory restrictions on the syscalls the privsep child can perform. This prevents a compromised privsep child from being used to attack other hosts (by opening sockets and proxying) or probing local kernel attack surface. The sandbox is implemented using systrace(4) in unsupervised "fast-path" mode, where a list of permitted syscalls is supplied. Any syscall not on the list results in SIGKILL being sent to the privsep child. Note that this requires a kernel with the new SYSTR_POLICY_KILL option. UsePrivilegeSeparation=sandbox will become the default in the future so please start testing it now. feedback dtucker@; ok markus@