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

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.
CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
5.1$0-$5k0.00

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_start();
   $_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.

Productinfo

Vendor

Name

CPE 2.3info

CPE 2.2info

CVSSv3info

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: 🔍

CVSSv2info

AVACAuCIA
🔍🔍🔍🔍🔍🔍
🔍🔍🔍🔍🔍🔍
🔍🔍🔍🔍🔍🔍
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
unlockunlockunlockunlockunlockunlock
unlockunlockunlockunlockunlockunlock
unlockunlockunlockunlockunlockunlock

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

Exploitinginfo

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

Local: No
Remote: Yes

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

0-Dayunlockunlockunlockunlock
Todayunlockunlockunlockunlock

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍

Upgrade: seclists.org

Timelineinfo

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 🔍

Sourcesinfo

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

Entryinfo

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

Comments

No comments yet. Languages: en.

Please log in to comment.

Do you need the next level of professionalism?

Upgrade your account now!