Observium Network Monitor Feed /html/feed.php improper authentication

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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A vulnerability was found in Observium Network Monitor (unknown version) and classified as problematic. This issue affects an unknown function of the file /html/feed.php of the component Feed. The manipulation with an unknown input leads to a weak authentication vulnerability. Using CWE to declare the problem leads to CWE-287. When an actor claims to have a given identity, the software does not prove or insufficiently proves that the claim is correct. Impacted is confidentiality.

The bug was discovered 09/01/2016. The weakness was shared 11/10/2016 by Ronald Volgers as [CT-2016-1110] Unauthenticated RCE in Observium network monitor as confirmed mailinglist post (Full-Disclosure). The advisory is shared at seclists.org. The vendor cooperated in the coordination of the public release. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details are known, but no exploit is available. The following code is the reason for this vulnerability:

if (isset($_GET['hash']) && is_numeric($_GET['id']))
 $key = get_user_pref($_GET['id'], 'atom_key');
 $data = explode('|', decrypt($_GET['hash'], $key)); // user_id|user_level|auth_mechanism

 $user_id    = $data[0];
 $user_level = $data[1]; // FIXME, need new way for check userlevel, because it can be changed
 if (count($data) == 3)
   $check_auth_mechanism = $config['auth_mechanism'] == $data[2];
 } else {
   $check_auth_mechanism = TRUE; // Old way

 if ($user_id == $_GET['id'] && $check_auth_mechanism)
   $_SESSION['user_id']   = $user_id;
   $_SESSION['userlevel'] = $user_level;

The vulnerability was handled as a non-public zero-day exploit for at least 55 days. During that time the estimated underground price was around $0-$5k.

Upgrading eliminates this vulnerability. A possible mitigation has been published before and not just after the disclosure of the vulnerability.

The entries 93567, 93568 and 93570 are related to this item.




CPE 2.3info

CPE 2.2info


VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.1

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍



VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍


Class: Weak authentication
CWE: CWE-287
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔍


Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍


Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍

Upgrade: seclists.org


09/01/2016 🔍
10/21/2016 +50 days 🔍
10/21/2016 +0 days 🔍
10/26/2016 +5 days 🔍
11/10/2016 +15 days 🔍
11/11/2016 +1 days 🔍
05/30/2019 +930 days 🔍


Advisory: [CT-2016-1110] Unauthenticated RCE in Observium network monitor
Researcher: Ronald Volgers
Status: Confirmed
Coordinated: 🔍
See also: 🔍


Created: 11/11/2016 03:54 PM
Updated: 05/30/2019 09:32 AM
Changes: (1) vulnerability_cwe
Complete: 🔍


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