Observium Network Monitor rrdtool.inc.php command injection

CVSS Meta Temp Score
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Current Exploit Price (≈)
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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.
6.0$0-$5k0.00

A vulnerability has been found in Observium Network Monitor (the affected version is unknown) and classified as critical. This vulnerability affects some unknown processing of the file /includes/rrdtool.inc.php. The manipulation with an unknown input leads to a privilege escalation vulnerability. The CWE definition for the vulnerability is CWE-77. The software constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component. As an impact it is known to affect confidentiality, integrity, and availability.

The bug was discovered 09/01/2016. The weakness was presented 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 for download at seclists.org. The public release was coordinated in cooperation with the vendor. The exploitation appears to be easy. The attack can be initiated remotely. Required for exploitation is a single authentication. There are known technical details, but no exploit is available. Responsible for the vulnerability is the following code:

function rrdtool_pipe_open(&$rrd_process, &$rrd_pipes)
{
 global $config;

 $command = $config['rrdtool'] . " -"; // Waits for input via standard input (STDIN)

 $descriptorspec = array(
    0 => array("pipe", "r"),  // stdin
    1 => array("pipe", "w"),  // stdout
    2 => array("pipe", "w")   // stderr
 );

 $cwd = $config['rrd_dir'];
 $env = array();

 $rrd_process = proc_open($command, $descriptorspec, $rrd_pipes, $cwd, $env);

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.

See 93567, 93569 and 93570 for similar entries.

Productinfoedit

Vendor

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CPE 2.3infoedit

CPE 2.2infoedit

CVSSv3infoedit

VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 6.0

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2infoedit

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfoedit

Class: Privilege escalation
CWE: CWE-77
ATT&CK: Unknown

Local: No
Remote: Yes

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

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Threat Intelligenceinfoedit

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

Countermeasuresinfoedit

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍

Upgrade: seclists.org

Timelineinfoedit

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 🔍

Sourcesinfoedit

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

Entryinfoedit

Created: 11/11/2016 03:54 PM
Updated: 05/30/2019 09:27 AM
Changes: (1) vulnerability_cwe
Complete: 🔍

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