Merge tag 'v2.8.6' into maint-2.9
Git 2.8.6
diff --git a/Documentation/RelNotes/2.7.6.txt b/Documentation/RelNotes/2.7.6.txt
new file mode 100644
index 0000000..4c6d1dc
--- /dev/null
+++ b/Documentation/RelNotes/2.7.6.txt
@@ -0,0 +1,25 @@
+Git v2.7.6 Release Notes
+========================
+
+Fixes since v2.7.5
+------------------
+
+ * A "ssh://..." URL can result in a "ssh" command line with a
+ hostname that begins with a dash "-", which would cause the "ssh"
+ command to instead (mis)treat it as an option. This is now
+ prevented by forbidding such a hostname (which will not be
+ necessary in the real world).
+
+ * Similarly, when GIT_PROXY_COMMAND is configured, the command is
+ run with host and port that are parsed out from "ssh://..." URL;
+ a poorly written GIT_PROXY_COMMAND could be tricked into treating
+ a string that begins with a dash "-". This is now prevented by
+ forbidding such a hostname and port number (again, which will not
+ be necessary in the real world).
+
+ * In the same spirit, a repository name that begins with a dash "-"
+ is also forbidden now.
+
+Credits go to Brian Neel at GitLab, Joern Schneeweisz of Recurity
+Labs and Jeff King at GitHub.
+
diff --git a/Documentation/RelNotes/2.8.6.txt b/Documentation/RelNotes/2.8.6.txt
new file mode 100644
index 0000000..d8db55d
--- /dev/null
+++ b/Documentation/RelNotes/2.8.6.txt
@@ -0,0 +1,4 @@
+Git v2.8.6 Release Notes
+========================
+
+This release forward-ports the fix for "ssh://..." URL from Git v2.7.6
diff --git a/cache.h b/cache.h
index 1fd2d5d..84148cf 100644
--- a/cache.h
+++ b/cache.h
@@ -1035,6 +1035,14 @@
int daemon_avoid_alias(const char *path);
extern int is_ntfs_dotgit(const char *name);
+/*
+ * Returns true iff "str" could be confused as a command-line option when
+ * passed to a sub-program like "ssh". Note that this has nothing to do with
+ * shell-quoting, which should be handled separately; we're assuming here that
+ * the string makes it verbatim to the sub-program.
+ */
+int looks_like_command_line_option(const char *str);
+
/**
* Return a newly allocated string with the evaluation of
* "$XDG_CONFIG_HOME/git/$filename" if $XDG_CONFIG_HOME is non-empty, otherwise
diff --git a/connect.c b/connect.c
index c53f3f1..c75bf52 100644
--- a/connect.c
+++ b/connect.c
@@ -557,6 +557,11 @@
get_host_and_port(&host, &port);
+ if (looks_like_command_line_option(host))
+ die("strange hostname '%s' blocked", host);
+ if (looks_like_command_line_option(port))
+ die("strange port '%s' blocked", port);
+
proxy = xmalloc(sizeof(*proxy));
child_process_init(proxy);
argv_array_push(&proxy->args, git_proxy_command);
@@ -726,6 +731,9 @@
conn = xmalloc(sizeof(*conn));
child_process_init(conn);
+ if (looks_like_command_line_option(path))
+ die("strange pathname '%s' blocked", path);
+
strbuf_addstr(&cmd, prog);
strbuf_addch(&cmd, ' ');
sq_quote_buf(&cmd, path);
@@ -758,6 +766,9 @@
return NULL;
}
+ if (looks_like_command_line_option(ssh_host))
+ die("strange hostname '%s' blocked", ssh_host);
+
ssh = getenv("GIT_SSH_COMMAND");
if (!ssh) {
const char *base;
diff --git a/path.c b/path.c
index 17551c4..0778ff0 100644
--- a/path.c
+++ b/path.c
@@ -1222,6 +1222,11 @@
}
}
+int looks_like_command_line_option(const char *str)
+{
+ return str && str[0] == '-';
+}
+
char *xdg_config_home(const char *filename)
{
const char *home, *config_home;
diff --git a/t/t5532-fetch-proxy.sh b/t/t5532-fetch-proxy.sh
index 51c9669..9c27986 100755
--- a/t/t5532-fetch-proxy.sh
+++ b/t/t5532-fetch-proxy.sh
@@ -43,4 +43,9 @@
test_cmp expect actual
'
+test_expect_success 'funny hostnames are rejected before running proxy' '
+ test_must_fail git fetch git://-remote/repo.git 2>stderr &&
+ ! grep "proxying for" stderr
+'
+
test_done
diff --git a/t/t5810-proto-disable-local.sh b/t/t5810-proto-disable-local.sh
index 563592d..c1ef99b 100755
--- a/t/t5810-proto-disable-local.sh
+++ b/t/t5810-proto-disable-local.sh
@@ -11,4 +11,27 @@
test_proto "file://" file "file://$PWD"
test_proto "path" file .
+test_expect_success 'setup repo with dash' '
+ git init --bare repo.git &&
+ git push repo.git HEAD &&
+ mv repo.git "$PWD/-repo.git"
+'
+
+# This will fail even without our rejection because upload-pack will
+# complain about the bogus option. So let's make sure that GIT_TRACE
+# doesn't show us even running upload-pack.
+#
+# We must also be sure to use "fetch" and not "clone" here, as the latter
+# actually canonicalizes our input into an absolute path (which is fine
+# to allow).
+test_expect_success 'repo names starting with dash are rejected' '
+ rm -f trace.out &&
+ test_must_fail env GIT_TRACE="$PWD/trace.out" git fetch -- -repo.git &&
+ ! grep upload-pack trace.out
+'
+
+test_expect_success 'full paths still work' '
+ git fetch "$PWD/-repo.git"
+'
+
test_done
diff --git a/t/t5813-proto-disable-ssh.sh b/t/t5813-proto-disable-ssh.sh
index a954ead..3f084ee 100755
--- a/t/t5813-proto-disable-ssh.sh
+++ b/t/t5813-proto-disable-ssh.sh
@@ -17,4 +17,27 @@
test_proto "ssh://" ssh "ssh://remote$PWD/remote/repo.git"
test_proto "git+ssh://" ssh "git+ssh://remote$PWD/remote/repo.git"
+# Don't even bother setting up a "-remote" directory, as ssh would generally
+# complain about the bogus option rather than completing our request. Our
+# fake wrapper actually _can_ handle this case, but it's more robust to
+# simply confirm from its output that it did not run at all.
+test_expect_success 'hostnames starting with dash are rejected' '
+ test_must_fail git clone ssh://-remote/repo.git dash-host 2>stderr &&
+ ! grep ^ssh: stderr
+'
+
+test_expect_success 'setup repo with dash' '
+ git init --bare remote/-repo.git &&
+ git push remote/-repo.git HEAD
+'
+
+test_expect_success 'repo names starting with dash are rejected' '
+ test_must_fail git clone remote:-repo.git dash-path 2>stderr &&
+ ! grep ^ssh: stderr
+'
+
+test_expect_success 'full paths still work' '
+ git clone "remote:$PWD/remote/-repo.git" dash-path
+'
+
test_done
