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diff --git a/cache.h b/cache.h
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index 94ca1ac..2ab9ffd 100644
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--- a/cache.h
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+++ b/cache.h
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@@ -744,6 +744,14 @@ char *strip_path_suffix(const char *path, const char *suffix);
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int daemon_avoid_alias(const char *path);
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int offset_1st_component(const char *path);
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fdd391 |
+/*
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+ * Returns true iff "str" could be confused as a command-line option when
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+ * passed to a sub-program like "ssh". Note that this has nothing to do with
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+ * shell-quoting, which should be handled separately; we're assuming here that
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+ * the string makes it verbatim to the sub-program.
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+ */
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+int looks_like_command_line_option(const char *str);
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+
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/* object replacement */
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#define READ_SHA1_FILE_REPLACE 1
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extern void *read_sha1_file_extended(const unsigned char *sha1, enum object_type *type, unsigned long *size, unsigned flag);
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diff --git a/connect.c b/connect.c
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index 6d4ea13..970f565 100644
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--- a/connect.c
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+++ b/connect.c
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@@ -450,6 +450,11 @@ static struct child_process *git_proxy_connect(int fd[2], char *host)
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get_host_and_port(&host, &port);
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+ if (looks_like_command_line_option(host))
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+ die("strange hostname '%s' blocked", host);
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+ if (looks_like_command_line_option(port))
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+ die("strange port '%s' blocked", port);
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+
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argv = xmalloc(sizeof(*argv) * 4);
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argv[0] = git_proxy_command;
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argv[1] = host;
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@@ -613,6 +618,10 @@ struct child_process *git_connect(int fd[2], const char *url_orig,
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conn = xcalloc(1, sizeof(*conn));
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+ if (looks_like_command_line_option(path))
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+ die("strange pathname '%s' blocked", path);
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+
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+
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strbuf_init(&cmd, MAX_CMD_LEN);
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strbuf_addstr(&cmd, prog);
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strbuf_addch(&cmd, ' ');
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@@ -626,6 +635,10 @@ struct child_process *git_connect(int fd[2], const char *url_orig,
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const char *ssh = getenv("GIT_SSH");
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int putty = ssh && strcasestr(ssh, "plink");
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transport_check_allowed("ssh");
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+ if (looks_like_command_line_option(host))
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+ die("strange hostname '%s' blocked", host);
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+
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+
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if (!ssh) ssh = "ssh";
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*arg++ = ssh;
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diff --git a/path.c b/path.c
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index 04ff148..713d79b 100644
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fdd391 |
--- a/path.c
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+++ b/path.c
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fdd391 |
@@ -701,3 +701,9 @@ int offset_1st_component(const char *path)
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return 2 + is_dir_sep(path[2]);
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return is_dir_sep(path[0]);
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}
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fdd391 |
+
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+int looks_like_command_line_option(const char *str)
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+{
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+ return str && str[0] == '-';
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+}
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fdd391 |
+
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fdd391 |
diff --git a/t/t5532-fetch-proxy.sh b/t/t5532-fetch-proxy.sh
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fdd391 |
index 5531bd1..d3b2651 100755
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fdd391 |
--- a/t/t5532-fetch-proxy.sh
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fdd391 |
+++ b/t/t5532-fetch-proxy.sh
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fdd391 |
@@ -40,4 +40,9 @@ test_expect_success 'fetch through proxy works' '
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fdd391 |
test_cmp expect actual
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'
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fdd391 |
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fdd391 |
+test_expect_success 'funny hostnames are rejected before running proxy' '
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fdd391 |
+ test_must_fail git fetch git://-remote/repo.git 2>stderr &&
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fdd391 |
+ ! grep "proxying for" stderr
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fdd391 |
+'
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fdd391 |
+
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fdd391 |
test_done
|