![Bernd Kuhls](/assets/img/avatar_default.png)
Added license hash. Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
383 lines
10 KiB
Diff
383 lines
10 KiB
Diff
From 71cd49ea82313f78d52a52d0c628a3770dc96608 Mon Sep 17 00:00:00 2001
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From: TJ Saunders <tj@castaglia.org>
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Date: Wed, 17 Jul 2019 09:25:31 -0700
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Subject: [PATCH] Bug #4372: Ensure that mod_copy checks for <Limits> for its
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SITE CPFR/CPTO commands.
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https://tbspace.de/cve201912815proftpd.html
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Downloaded from upstream commit
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https://github.com/proftpd/proftpd/commit/d19dd64161936d70c0a1544bd2c8e90850f4b7ae
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Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
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---
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contrib/mod_copy.c | 36 ++-
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tests/t/lib/ProFTPD/Tests/Modules/mod_copy.pm | 253 +++++++++++++++++-
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2 files changed, 285 insertions(+), 4 deletions(-)
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diff --git a/contrib/mod_copy.c b/contrib/mod_copy.c
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index 26b72a91d..c8672c40d 100644
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--- a/contrib/mod_copy.c
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+++ b/contrib/mod_copy.c
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@@ -1,7 +1,7 @@
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/*
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* ProFTPD: mod_copy -- a module supporting copying of files on the server
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* without transferring the data to the client and back
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- * Copyright (c) 2009-2016 TJ Saunders
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+ * Copyright (c) 2009-2019 TJ Saunders
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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@@ -657,7 +657,7 @@ MODRET copy_copy(cmd_rec *cmd) {
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MODRET copy_cpfr(cmd_rec *cmd) {
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register unsigned int i;
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int res;
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- char *path = "";
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+ char *cmd_name, *path = "";
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unsigned char *authenticated = NULL;
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if (copy_engine == FALSE) {
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@@ -705,6 +705,21 @@ MODRET copy_cpfr(cmd_rec *cmd) {
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path = pstrcat(cmd->tmp_pool, path, *path ? " " : "", decoded_path, NULL);
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}
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+ cmd_name = cmd->argv[0];
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+ pr_cmd_set_name(cmd, "SITE_CPFR");
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+ if (!dir_check(cmd->tmp_pool, cmd, G_READ, path, NULL)) {
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+ int xerrno = EPERM;
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+
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+ pr_cmd_set_name(cmd, cmd_name);
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+ pr_response_add_err(R_550, "%s: %s", (char *) cmd->argv[3],
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+ strerror(xerrno));
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+
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+ pr_cmd_set_errno(cmd, xerrno);
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+ errno = xerrno;
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+ return PR_ERROR(cmd);
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+ }
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+ pr_cmd_set_name(cmd, cmd_name);
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+
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res = pr_filter_allow_path(CURRENT_CONF, path);
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switch (res) {
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case 0:
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@@ -758,6 +773,7 @@ MODRET copy_cpfr(cmd_rec *cmd) {
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MODRET copy_cpto(cmd_rec *cmd) {
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register unsigned int i;
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const char *from, *to = "";
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+ char *cmd_name;
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unsigned char *authenticated = NULL;
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if (copy_engine == FALSE) {
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@@ -816,6 +832,20 @@ MODRET copy_cpto(cmd_rec *cmd) {
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to = dir_canonical_vpath(cmd->tmp_pool, to);
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+ cmd_name = cmd->argv[0];
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+ pr_cmd_set_name(cmd, "SITE_CPTO");
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+ if (!dir_check(cmd->tmp_pool, cmd, G_WRITE, to, NULL)) {
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+ int xerrno = EPERM;
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+
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+ pr_cmd_set_name(cmd, cmd_name);
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+ pr_response_add_err(R_550, "%s: %s", to, strerror(xerrno));
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+
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+ pr_cmd_set_errno(cmd, xerrno);
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+ errno = xerrno;
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+ return PR_ERROR(cmd);
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+ }
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+ pr_cmd_set_name(cmd, cmd_name);
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+
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if (copy_paths(cmd->tmp_pool, from, to) < 0) {
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int xerrno = errno;
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const char *err_code = R_550;
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@@ -940,7 +970,7 @@ static conftable copy_conftab[] = {
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static cmdtable copy_cmdtab[] = {
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{ CMD, C_SITE, G_WRITE, copy_copy, FALSE, FALSE, CL_MISC },
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- { CMD, C_SITE, G_DIRS, copy_cpfr, FALSE, FALSE, CL_MISC },
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+ { CMD, C_SITE, G_READ, copy_cpfr, FALSE, FALSE, CL_MISC },
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{ CMD, C_SITE, G_WRITE, copy_cpto, FALSE, FALSE, CL_MISC },
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{ POST_CMD, C_PASS, G_NONE, copy_post_pass, FALSE, FALSE },
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{ LOG_CMD, C_SITE, G_NONE, copy_log_site, FALSE, FALSE },
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diff --git a/tests/t/lib/ProFTPD/Tests/Modules/mod_copy.pm b/tests/t/lib/ProFTPD/Tests/Modules/mod_copy.pm
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index 778bff839..2018e71bc 100644
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--- a/tests/t/lib/ProFTPD/Tests/Modules/mod_copy.pm
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+++ b/tests/t/lib/ProFTPD/Tests/Modules/mod_copy.pm
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@@ -121,6 +121,15 @@ my $TESTS = {
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test_class => [qw(bug forking)],
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},
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+ copy_cpfr_config_limit_read_bug4372 => {
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+ order => ++$order,
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+ test_class => [qw(bug forking)],
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+ },
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+
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+ copy_cpto_config_limit_write_bug4372 => {
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+ order => ++$order,
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+ test_class => [qw(bug forking)],
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+ },
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};
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sub new {
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@@ -3248,6 +3257,12 @@ sub copy_config_limit_bug3399 {
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my ($port, $config_user, $config_group) = config_write($config_file, $config);
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+ my $config_subdir = $sub_dir;
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+ if ($^O eq 'darwin') {
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+ # MacOSX hack
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+ $config_subdir = '/private' . $sub_dir;
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+ }
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+
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if (open(my $fh, ">> $config_file")) {
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print $fh <<EOC;
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<Directory />
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@@ -3256,7 +3271,7 @@ sub copy_config_limit_bug3399 {
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</Limit>
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</Directory>
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-<Directory $sub_dir>
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+<Directory $config_subdir>
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<Limit WRITE>
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AllowAll
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</Limit>
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@@ -3652,4 +3667,240 @@ sub copy_cpto_timeout_bug4263 {
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test_cleanup($setup->{log_file}, $ex);
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}
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+sub copy_cpfr_config_limit_read_bug4372 {
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+ my $self = shift;
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+ my $tmpdir = $self->{tmpdir};
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+ my $setup = test_setup($tmpdir, 'copy');
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+
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+ my $src_file = File::Spec->rel2abs("$tmpdir/foo.dat");
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+ if (open(my $fh, "> $src_file")) {
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+ unless (close($fh)) {
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+ die("Can't write $src_file: $!");
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+ }
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+
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+ } else {
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+ die("Can't open $src_file: $!");
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+ }
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+
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+ my $config = {
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+ PidFile => $setup->{pid_file},
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+ ScoreboardFile => $setup->{scoreboard_file},
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+ SystemLog => $setup->{log_file},
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+ TraceLog => $setup->{log_file},
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+ Trace => 'copy:20 timer:20',
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+
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+ AuthUserFile => $setup->{auth_user_file},
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+ AuthGroupFile => $setup->{auth_group_file},
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+ TimeoutIdle => 3,
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+
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+ IfModules => {
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+ 'mod_delay.c' => {
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+ DelayEngine => 'off',
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+ },
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+ },
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+ };
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+
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+ my ($port, $config_user, $config_group) = config_write($setup->{config_file},
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+ $config);
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+
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+ if (open(my $fh, ">> $setup->{config_file}")) {
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+ print $fh <<EOC;
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+<Directory />
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+ <Limit READ>
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+ DenyAll
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+ </Limit>
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+</Directory>
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+EOC
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+ unless (close($fh)) {
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+ die("Can't write $setup->{config_file}: $!");
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+ }
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+
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+ } else {
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+ die("Can't open $setup->{config_file}: $!");
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+ }
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+
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+ # Open pipes, for use between the parent and child processes. Specifically,
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+ # the child will indicate when it's done with its test by writing a message
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+ # to the parent.
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+ my ($rfh, $wfh);
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+ unless (pipe($rfh, $wfh)) {
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+ die("Can't open pipe: $!");
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+ }
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+
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+ my $ex;
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+
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+ # Fork child
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+ $self->handle_sigchld();
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+ defined(my $pid = fork()) or die("Can't fork: $!");
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+ if ($pid) {
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+ eval {
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+ my $client = ProFTPD::TestSuite::FTP->new('127.0.0.1', $port, 0, 1);
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+ $client->login($setup->{user}, $setup->{passwd});
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+
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+ eval { $client->site('CPFR', 'foo.dat') };
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+ unless ($@) {
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+ die("SITE CPFR succeeded unexpectedly");
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+ }
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+
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+ my $resp_code = $client->response_code();
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+ my $resp_msg = $client->response_msg();
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+
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+ my $expected = 550;
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+ $self->assert($expected == $resp_code,
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+ test_msg("Expected response code $expected, got $resp_code"));
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+
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+ $expected = 'Operation not permitted';
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+ $self->assert(qr/$expected/, $resp_msg,
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+ test_msg("Expected response message '$expected', got '$resp_msg'"));
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+
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+ $client->quit();
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+ };
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+ if ($@) {
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+ $ex = $@;
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+ }
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+
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+ $wfh->print("done\n");
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+ $wfh->flush();
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+
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+ } else {
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+ eval { server_wait($setup->{config_file}, $rfh, 30) };
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+ if ($@) {
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+ warn($@);
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+ exit 1;
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+ }
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+
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+ exit 0;
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+ }
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+
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+ # Stop server
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+ server_stop($setup->{pid_file});
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+ $self->assert_child_ok($pid);
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+
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+ test_cleanup($setup->{log_file}, $ex);
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+}
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+
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+sub copy_cpto_config_limit_write_bug4372 {
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+ my $self = shift;
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+ my $tmpdir = $self->{tmpdir};
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+ my $setup = test_setup($tmpdir, 'copy');
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+
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+ my $src_file = File::Spec->rel2abs("$tmpdir/foo.dat");
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+ if (open(my $fh, "> $src_file")) {
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+ unless (close($fh)) {
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+ die("Can't write $src_file: $!");
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+ }
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+
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+ } else {
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+ die("Can't open $src_file: $!");
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+ }
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+
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+ my $dst_file = File::Spec->rel2abs("$tmpdir/bar.dat");
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+
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+ my $config = {
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+ PidFile => $setup->{pid_file},
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+ ScoreboardFile => $setup->{scoreboard_file},
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+ SystemLog => $setup->{log_file},
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+ TraceLog => $setup->{log_file},
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+ Trace => 'copy:20 timer:20',
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+
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+ AuthUserFile => $setup->{auth_user_file},
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+ AuthGroupFile => $setup->{auth_group_file},
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+ TimeoutIdle => 3,
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+
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+ IfModules => {
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+ 'mod_delay.c' => {
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+ DelayEngine => 'off',
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+ },
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+ },
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+ };
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+
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+ my ($port, $config_user, $config_group) = config_write($setup->{config_file},
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+ $config);
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+
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+ if (open(my $fh, ">> $setup->{config_file}")) {
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+ print $fh <<EOC;
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+<Directory />
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+ <Limit WRITE>
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+ DenyAll
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+ </Limit>
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+</Directory>
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+EOC
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+ unless (close($fh)) {
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+ die("Can't write $setup->{config_file}: $!");
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+ }
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+
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+ } else {
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+ die("Can't open $setup->{config_file}: $!");
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+ }
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+
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+ # Open pipes, for use between the parent and child processes. Specifically,
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+ # the child will indicate when it's done with its test by writing a message
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+ # to the parent.
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+ my ($rfh, $wfh);
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+ unless (pipe($rfh, $wfh)) {
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+ die("Can't open pipe: $!");
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+ }
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+
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+ my $ex;
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+
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+ # Fork child
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+ $self->handle_sigchld();
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+ defined(my $pid = fork()) or die("Can't fork: $!");
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+ if ($pid) {
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+ eval {
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+ my $client = ProFTPD::TestSuite::FTP->new('127.0.0.1', $port, 0, 1);
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+ $client->login($setup->{user}, $setup->{passwd});
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+
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+ my ($resp_code, $resp_msg) = $client->site('CPFR', 'foo.dat');
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+
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+ my $expected = 350;
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+ $self->assert($expected == $resp_code,
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+ test_msg("Expected response code $expected, got $resp_code"));
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+
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+ $expected = 'File or directory exists, ready for destination name';
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+ $self->assert($expected eq $resp_msg,
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+ test_msg("Expected response message '$expected', got '$resp_msg'"));
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+
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+ eval { $client->site('CPTO', 'bar.dat') };
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+ unless ($@) {
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+ die('SITE CPTO succeeded unexpectedly');
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+ }
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+
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+ my $resp_code = $client->response_code();
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+ my $resp_msg = $client->response_msg();
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+
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+ my $expected = 550;
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+ $self->assert($expected == $resp_code,
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+ test_msg("Expected response code $expected, got $resp_code"));
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+
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+ $expected = 'Operation not permitted';
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+ $self->assert(qr/$expected/, $resp_msg,
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+ test_msg("Expected response message '$expected', got '$resp_msg'"));
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+
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+ $client->quit();
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+ };
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+ if ($@) {
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+ $ex = $@;
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+ }
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+
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+ $wfh->print("done\n");
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+ $wfh->flush();
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+
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+ } else {
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+ eval { server_wait($setup->{config_file}, $rfh, 30) };
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+ if ($@) {
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+ warn($@);
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+ exit 1;
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+ }
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+
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+ exit 0;
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+ }
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+
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+ # Stop server
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+ server_stop($setup->{pid_file});
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+ $self->assert_child_ok($pid);
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+
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+ test_cleanup($setup->{log_file}, $ex);
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+}
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+
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1;
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