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upstream: add some cautionary text about % token expansion and 

shell metacharacters; based on report from vinci AT protonmail.ch

OpenBSD-Commit-ID: aa1450a54fcee2f153ef70368d90edb1e7019113
This commit is contained in:
djm@openbsd.org 2023-10-04 04:03:50 +00:00 committed by Damien Miller
parent 60ec3d54fd
commit ffe27e54a4
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1 changed files with 12 additions and 2 deletions
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14
ssh_config.5
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@ -33,8 +33,8 @@
.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
.\"
.\" $OpenBSD: ssh_config.5,v 1.386 2023/08/28 09:52:09 djm Exp $
.Dd $Mdocdate: August 28 2023 $
.\" $OpenBSD: ssh_config.5,v 1.387 2023/10/04 04:03:50 djm Exp $
.Dd $Mdocdate: October 4 2023 $
.Dt SSH_CONFIG 5
.Os
.Sh NAME
@ -2206,6 +2206,16 @@ accepts all tokens.
and
.Cm ProxyJump
accept the tokens %%, %h, %n, %p, and %r.
.Pp
Note that some of these directives build commands for execution via the shell.
Because
.Xr ssh 1
performs no filtering or escaping of characters that have special meaning in
shell commands (e.g. quotes), it is the user's reposibility to ensure that
the arguments passed to
.Xr ssh 1
do not contain such characters and that tokens are appropriately quoted
when used.
.Sh ENVIRONMENT VARIABLES
Arguments to some keywords can be expanded at runtime from environment
variables on the client by enclosing them in