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command.php
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command.php
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<?php
/**
* Checks for vulnerabilities at wpvulndb.com.
*
* @author markri http://github.com/markri
* @license MIT
*/
if (!class_exists('WP_CLI')) {
// Whoops, something is wrong
return;
}
if (!class_exists('WpSecCheck')) {
class WpSecCheck
{
const OUTPUT_USER = 'user';
const OUTPUT_JSON = 'json';
const OUTPUT_NAGIOS = 'nagios';
const API_V3 = 'v3';
private $outputType = true;
private $cached = false; // No caching as default. Don't exceed 30 calls for every 30 seconds
private $cacheTTL = 28800; // default to 8 hours
private $APIversion = self::API_V3; // Defaults to 3 now
private $token = null; // Token to use for API v3
private $coreVulnerabilityCount = 0;
private $coreVulnerabilities = array();
private $pluginVulnerabilityCount = 0;
private $pluginVulnerabilities = array();
private $themeVulnerabilityCount = 0;
private $themeVulnerabilities = array();
private $cacheHitCount = 0;
private $vulndbRequestCount = 0;
/**
* @param $ags
* @param $assoc_args
*/
public function __invoke($ags, $assoc_args)
{
// Parse user options
$checkCore = true;
$checkThemes = true;
$checkPlugins = true;
switch ($assoc_args['type']) {
case 'core':
$checkThemes = false;
$checkPlugins = false;
break;
case 'themes':
$checkCore = false;
$checkPlugins = false;
break;
case 'plugins':
$checkCore = false;
$checkThemes = false;
break;
default:
break;
}
$this->outputType = $assoc_args['output'];
$this->cached = isset($assoc_args['cached']);
$this->cacheTTL = isset($assoc_args['ttl']) ? $assoc_args['ttl'] : $this->cacheTTL;
$this->APIversion = isset($assoc_args['api']) ? $assoc_args['api'] : $this->APIversion;
$this->token = isset($assoc_args['token']) ? $assoc_args['token'] : $this->token;
// Validate wordpress installation
$output = WP_CLI::runcommand('core is-installed', array(
'return' => 'all',
'exit_error' => false,
));
if ($output->return_code == 1) {
WP_CLI::error('No wordpress installation found');
}
if (empty($this->token)) {
WP_CLI::error('Token is required, register one at https://wpvulndb.com/users/sign_up');
}
// Execute
if ($checkCore) {
$this->checkCoreVulnerability();
}
if ($checkPlugins) {
$this->checkPluginVulnerabilities();
}
if ($checkThemes) {
$this->checkThemeVulnerabilities();
}
// Output
switch ($this->outputType) {
case self::OUTPUT_USER:
if ($this->coreVulnerabilityCount == 0 && $this->pluginVulnerabilityCount == 0 && $this->themeVulnerabilityCount == 0) {
WP_CLI::line('-----------------------------------------------');
WP_CLI::line('');
WP_CLI::success('No vulnerabilities found');
} else {
WP_CLI::line('-----------------------------------------------');
WP_CLI::line('');
WP_CLI::warning(
sprintf(
'%s core, %s plugin and %s theme vulnerabilities found',
$this->coreVulnerabilityCount,
$this->pluginVulnerabilityCount,
$this->themeVulnerabilityCount
)
);
}
break;
case self::OUTPUT_NAGIOS:
if ($this->coreVulnerabilityCount == 0 && $this->pluginVulnerabilityCount == 0 && $this->themeVulnerabilityCount == 0) {
WP_CLI::line('OK - no vulnerabilities found | vulns=0');
exit(0);
} else {
WP_CLI::line(
sprintf(
'CRITICAL - %s core, %s plugin and %s theme vulnerabilities found | vulns=%s',
$this->coreVulnerabilityCount,
$this->pluginVulnerabilityCount,
$this->themeVulnerabilityCount,
$this->coreVulnerabilityCount + $this->pluginVulnerabilityCount + $this->themeVulnerabilityCount
)
);
exit(2);
}
break;
case self::OUTPUT_JSON:
$output = array();
if ($checkCore) {
$output['core'] = array(
'count' => $this->coreVulnerabilityCount,
'details' => $this->coreVulnerabilities,
);
}
if ($checkPlugins) {
$output['plugins'] = array(
'count' => $this->pluginVulnerabilityCount,
'details' => $this->pluginVulnerabilities,
);
}
if ($checkThemes) {
$output['themes'] = array(
'count' => $this->themeVulnerabilityCount,
'details' => $this->themeVulnerabilities,
);
}
$output['hits'] = array(
'cache hits' => $this->cacheHitCount,
'wpvulndb queries' => $this->vulndbRequestCount,
);
WP_CLI::line(json_encode($output));
break;
}
}
/**
* Checks core version at wpvulndb.
*/
private function checkCoreVulnerability()
{
// Get version through internal WP_CLI command
$output = WP_CLI::runcommand('core version', array(
'return' => 'all',
'exit_error' => false,
));
$coreVersion = trim($output->stdout);
switch ($this->outputType) {
case self::OUTPUT_JSON:
break;
case self::OUTPUT_NAGIOS:
break;
default:
WP_CLI::line('');
WP_CLI::line('-----------------------------------------------');
WP_CLI::line(sprintf('Checking core vulnerabilities for version %s', $coreVersion));
WP_CLI::line('-----------------------------------------------');
WP_CLI::line('');
break;
}
// Connect to wpvulndb
$parameter = intval(str_replace('.', '', $coreVersion));
$cache = WP_CLI::get_cache();
$cache_key = sprintf("wp-sec/core-%s.json", $parameter);
$cache_file = $cache->has( $cache_key, $this->cacheTTL );
if ($cache_file && $this->cached) {
$url = 'Cache';
$req = unserialize($cache->read($cache_key));
++$this->cacheHitCount;
}
else {
$url = sprintf('https://wpvulndb.com/api/v3/wordpresses/%s', $parameter);
$req = WP_CLI\Utils\http_request('GET', $url, null, array('Authorization' => sprintf('Token token=%s', $this->token)));
++$this->vulndbRequestCount;
$cache->write($cache_key, serialize($req));
}
$json = json_decode($req->body, true);
if ( '20' != substr( $req->status_code, 0, 2 ) ) {
WP_CLI::error(sprintf('Couldn\'t check wpvulndb @ %s (HTTP code %s)', $url, $req->status_code));
}
if (!array_key_exists($coreVersion, $json)) {
WP_CLI::error(sprintf('Version %s not found on wpvulndb', $coreVersion));
}
// Process found vulnerabilities
$vulnerabilities = $json[$coreVersion]['vulnerabilities'];
$this->coreVulnerabilityCount = count($vulnerabilities);
$this->coreVulnerabilities = $vulnerabilities;
if (empty($vulnerabilities)) {
switch ($this->outputType) {
case self::OUTPUT_JSON:
break;
case self::OUTPUT_NAGIOS:
break;
default:
WP_CLI::line(sprintf('No known core vulnerabilities found in version %s', $coreVersion));
WP_CLI::line('');
break;
}
return;
}
switch ($this->outputType) {
case self::OUTPUT_JSON:
break;
case self::OUTPUT_NAGIOS:
break;
default:
WP_CLI::line('');
WP_CLI::line(sprintf('Found %s core vulnerabilities:', count($vulnerabilities)));
break;
}
foreach ($vulnerabilities as $vulnerability) {
switch ($this->outputType) {
case self::OUTPUT_JSON:
break;
case self::OUTPUT_NAGIOS:
break;
default:
WP_CLI::line('-----------------------------');
WP_CLI::line(sprintf('Title: %s', $vulnerability['title']));
if (array_key_exists('cve', $vulnerability['references'])) {
$cves = $vulnerability['references']['cve'];
WP_CLI::line(sprintf('CVE\'s: %s', implode(', ', $cves)));
}
WP_CLI::line(
sprintf(
'Fixed in: %s',
array_key_exists('fixed_in', $vulnerability) ? $vulnerability['fixed_in'] : 'fix n/a'
)
);
break;
}
}
return true;
}
/**
* Check plugins at wpvulndb.
*/
private function checkPluginVulnerabilities()
{
$this->pluginVulnerabilityCount = 0;
$output = WP_CLI::runcommand('plugin list --format=json', array(
'return' => 'all',
'exit_error' => false,
));
$plugins = json_decode($output->stdout, true);
if (null === $plugins) {
WP_CLI::error('No plugins found? Try `wp plugin list` to check for errors');
return;
}
switch ($this->outputType) {
case self::OUTPUT_JSON:
break;
case self::OUTPUT_NAGIOS:
break;
default:
WP_CLI::line('');
WP_CLI::line('-------------------------------');
WP_CLI::line('Checking plugin vulnerabilities');
WP_CLI::line('-------------------------------');
WP_CLI::line('');
WP_CLI::line('Vulnerabilities:');
break;
}
foreach ($plugins as $plugin) {
$title = $plugin['name'];
if (in_array($plugin['status'], array('must-use','dropin'), true )) {
// these types of plugins cannot be checked on wpvulndb
continue;
}
$version = $plugin['version'];
$cache = WP_CLI::get_cache();
$cache_key = sprintf("wp-sec/plugin-%s-%s.json", $title, $version);
$cache_file = $cache->has( $cache_key, $this->cacheTTL );
if ($cache_file && $this->cached) {
$url = 'Cache';
$req = unserialize($cache->read($cache_key));
++$this->cacheHitCount;
}
else {
$url = sprintf('https://wpvulndb.com/api/v3/plugins/%s', $title);
$req = WP_CLI\Utils\http_request('GET', $url, null, array('Authorization' => sprintf('Token token=%s', $this->token)));
++$this->vulndbRequestCount;
$cache->write($cache_key, serialize($req));
}
$json = json_decode($req->body, true);
if ( $req->status_code == '404') {
// For plugins we continue, because not every plugin has a vulnerability and therfore no entry at wpvulndb.com
continue;
} else if('20' != substr( $req->status_code, 0, 2 )) {
WP_CLI::error(sprintf('Couldn\'t check wpvulndb @ %s (HTTP code %s)', $url, $req->status_code));
}
$json_entry = NULL;
foreach ($json as $entry_title => $entry) {
if (strtolower($title) == strtolower($entry_title)) {
$json_entry = $entry;
break;
}
}
if ($json_entry === NULL) {
WP_CLI::error(sprintf('Unexpected response from wpvulndb for plugin %s', $title));
}
$vulnerabilities = $json_entry['vulnerabilities'];
$pluginVulnerabilities = array(
'title' => $title,
'version' => $version,
'status' => $plugin['status'],
'details' => array(),
'count' => 0
);
foreach ($vulnerabilities as $vulnerability) {
$safeVersion = $vulnerability['fixed_in'];
if (!$this->isVersionLessThan($version, $safeVersion)) {
continue;
}
++$this->pluginVulnerabilityCount;
++$pluginVulnerabilities['count'];
$pluginVulnerabilities['details'][] = $vulnerability;
switch ($this->outputType) {
case self::OUTPUT_JSON:
break;
case self::OUTPUT_NAGIOS:
break;
default:
WP_CLI::line('-----------------------------');
WP_CLI::line(sprintf('Plugin: %s', $title));
WP_CLI::line(sprintf('Version: %s', $version));
WP_CLI::line(sprintf('Vulnerability: %s', $vulnerability['title']));
if (array_key_exists('cve', $vulnerability['references'])) {
$cves = $vulnerability['references']['cve'];
WP_CLI::line(sprintf('CVE\'s: %s', implode(', ', $cves)));
}
WP_CLI::line(
sprintf(
'Fixed in: %s',
empty($vulnerability['fixed_in']) ? 'fix n/a' : $vulnerability['fixed_in']
)
);
break;
}
}
if ($pluginVulnerabilities['count'] > 0) {
$this->pluginVulnerabilities[] = $pluginVulnerabilities;
}
}
if ($this->pluginVulnerabilityCount === 0) {
switch ($this->outputType) {
case self::OUTPUT_JSON:
break;
case self::OUTPUT_NAGIOS:
break;
default:
WP_CLI::line('No known plugin vulnerabilities found');
break;
}
}
}
private function checkThemeVulnerabilities()
{
$this->themeVulnerabilityCount = 0;
$output = WP_CLI::runcommand('theme list --format=json', array(
'return' => 'all',
'exit_error' => false,
));
$themes = json_decode($output->stdout, true);
if (null === $themes) {
WP_CLI::error('No themes found? Try `wp theme list` to check for errors');
return;
}
switch ($this->outputType) {
case self::OUTPUT_JSON:
break;
case self::OUTPUT_NAGIOS:
break;
default:
WP_CLI::line('');
WP_CLI::line('------------------------------');
WP_CLI::line('Checking theme vulnerabilities');
WP_CLI::line('------------------------------');
WP_CLI::line('');
WP_CLI::line('Vulnerabilities:');
break;
}
foreach ($themes as $theme) {
$title = $theme['name'];
$version = $theme['version'];
$cache = WP_CLI::get_cache();
$cache_key = sprintf("wp-sec/theme-%s-%s.json", $title, $version);
$cache_file = $cache->has( $cache_key, $this->cacheTTL );
if ($cache_file && $this->cached) {
$url = 'Cache';
$req = unserialize($cache->read($cache_key));
++$this->cacheHitCount;
}
else {
$url = sprintf('https://wpvulndb.com/api/v3/themes/%s', $title);
$req = WP_CLI\Utils\http_request('GET', $url, null, array('Authorization' => sprintf('Token token=%s', $this->token)));
++$this->vulndbRequestCount;
$cache->write($cache_key, serialize($req));
}
$json = json_decode($req->body, true);
if ( $req->status_code == '404') {
// For plugins we continue, because not every theme has a vulnerability and therfore no entry at wpvulndb.com
continue;
} else if('20' != substr( $req->status_code, 0, 2 )) {
WP_CLI::error(sprintf('Couldn\'t check wpvulndb @ %s (HTTP code %s)', $url, $req->status_code));
}
$json_entry = NULL;
foreach ($json as $entry_title => $entry) {
if (strtolower($title) == strtolower($entry_title)) {
$json_entry = $entry;
break;
}
}
if ($json_entry === NULL) {
WP_CLI::error(sprintf('Unexpected response from wpvulndb for theme %s', $title));
}
$vulnerabilities = $json_entry['vulnerabilities'];
$themeVulnerabilities = array(
'title' => $title,
'version' => $version,
'status' => $theme['status'],
'details' => array(),
'count' => 0
);
foreach ($vulnerabilities as $vulnerability) {
$safeVersion = $vulnerability['fixed_in'];
if (!$this->isVersionLessThan($version, $safeVersion)) {
continue;
}
++$this->themeVulnerabilityCount;
++$themeVulnerabilities['count'];
$themeVulnerabilities['details'][] = $vulnerability;
switch ($this->outputType) {
case self::OUTPUT_JSON:
break;
case self::OUTPUT_NAGIOS:
break;
default:
WP_CLI::line('-----------------------------');
WP_CLI::line(sprintf('Theme: %s', $title));
WP_CLI::line(sprintf('Version: %s', $version));
WP_CLI::line(sprintf('Vulnerability: %s', $vulnerability['title']));
if (array_key_exists('cve', $vulnerability['references'])) {
$cves = $vulnerability['references']['cve'];
WP_CLI::line(sprintf('CVE\'s: %s', implode(', ', $cves)));
}
WP_CLI::line(
sprintf(
'Fixed in: %s',
empty($vulnerability['fixed_in']) ? 'fix n/a' : $vulnerability['fixed_in']
)
);
break;
}
}
if ($themeVulnerabilities['count'] > 0) {
$this->themeVulnerabilities[] = $themeVulnerabilities;
}
}
if ($this->themeVulnerabilityCount === 0) {
switch ($this->outputType) {
case self::OUTPUT_JSON:
break;
case self::OUTPUT_NAGIOS:
break;
default:
WP_CLI::line('No known theme vulnerabilities found');
break;
}
}
}
/**
* @param $versionToCheck
* @param $minimumVersion
*
* @return bool
*/
private function isVersionLessThan($versionToCheck, $minimumVersion)
{
$toCheckParts = explode('.', trim($versionToCheck));
$minimumParts = explode('.', trim($minimumVersion));
// Be sure to fill in zeros, e.g. we have 4.5 but fixed version is 4.5.3, so we modify 4.5 to 4.5.0
if (count($minimumParts) > count($toCheckParts)) {
$toCheckParts = array_pad($toCheckParts, count($minimumParts), 0);
}
// The other way around as well, in case we have 1.2.3 but fixed in is 1.2, we modify 1.2 to 1.2.0
if (count($toCheckParts) > count($minimumParts)) {
$minimumParts = array_pad($minimumParts, count($toCheckParts), 0);
}
foreach ($toCheckParts as $index => $version) {
if ($version < $minimumParts[$index]) {
return true;
} elseif ($version > $minimumParts[$index]) {
return false;
}
}
return false; // equals to the minimum required version
}
}
}
if (!class_exists('WpSecVersion')) {
class WpSecVersion
{
public function __invoke()
{
WP_CLI::line('Version: 1.0.0');
}
}
}
WP_CLI::add_command(
'wp-sec check',
'WpSecCheck',
array(
'shortdesc' => 'Checks for vulnerabilities at wpvulndb.com. See wp wp-sec check --help for more details',
'synopsis' => array(
array(
'type' => 'assoc',
'name' => 'type',
'optional' => true,
'default' => 'all',
'options' => array('core', 'themes', 'plugins', 'all'),
),
array(
'type' => 'assoc',
'name' => 'output',
'optional' => true,
'default' => 'user',
'options' => array('json', 'nagios', 'user'),
),
array(
'type' => 'flag',
'name' => 'cached',
'optional' => true,
),
array(
'type' => 'assoc',
'name' => 'ttl',
'optional' => true
),
array(
'type' => 'assoc',
'name' => 'api',
'optional' => true
),
array(
'type' => 'assoc',
'name' => 'token',
'optional' => true
),
),
'when' => 'before_wp_load',
)
);
WP_CLI::add_command(
'wp-sec version',
'WpSecVersion',
array(
'shortdesc' => 'Returns current version of wp-sec',
'when' => 'before_wp_load',
)
);