Revision 820d7650cc670d3e4195aad3a5343158c316e8fa authored by Junio C Hamano on 26 July 2017, 17:24:20 UTC, committed by Junio C Hamano on 28 July 2017, 22:51:14 UTC
When commands like "git fetch" talk with ssh://$rest_of_URL/, the code splits $rest_of_URL into components like host, port, etc., and then spawns the underlying "ssh" program by formulating argv[] array that has: - the path to ssh command taken from GIT_SSH_COMMAND, etc. - dashed options like '-batch' (for Tortoise), '-p <port>' as needed. - ssh_host, which is supposed to be the hostname parsed out of $rest_of_URL. - then the command to be run on the other side, e.g. git upload-pack. If the ssh_host ends up getting '-<anything>', the argv[] that is used to spawn the command becomes something like: { "ssh", "-p", "22", "-<anything>", "command", "to", "run", NULL } which obviously is bogus, but depending on the actual value of "<anything>", will make "ssh" parse and use it as an option. Prevent this by forbidding ssh_host that begins with a "-". Noticed-by: Joern Schneeweisz of Recurity Labs Reported-by: Brian at GitLab Signed-off-by: Junio C Hamano <gitster@pobox.com> Reviewed-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
1 parent c8dd1e3
t4136-apply-check.sh
#!/bin/sh
test_description='git apply should exit non-zero with unrecognized input.'
. ./test-lib.sh
test_expect_success 'setup' '
test_commit 1
'
test_expect_success 'apply --check exits non-zero with unrecognized input' '
test_must_fail git apply --check - <<-\EOF
I am not a patch
I look nothing like a patch
git apply must fail
EOF
'
test_expect_success 'apply exits non-zero with no-op patch' '
cat >input <<-\EOF &&
diff --get a/1 b/1
index 6696ea4..606eddd 100644
--- a/1
+++ b/1
@@ -1,1 +1,1 @@
1
EOF
test_must_fail git apply --stat input &&
test_must_fail git apply --check input
'
test_done
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