Observium PHP Object Unserialization Remote File Writing Vulnerability

critical Nessus Plugin ID 95391

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Synopsis

The remote Observium server is affected by a remote file writing vulnerability.

Description

The remote Observium server is affected by a remote file writing vulnerability in the var_decode() function in common.inc.php due to improper validation of user-supplied GET, POST and COOKIE values before use in the PHP unserialize() function. An unauthenticated, remote attacker can exploit this to write data to arbitrary files, including a PHP session file that allows the attacker to gain administrative privileges.

Note that Observium is reportedly affected by additional vulnerabilities; however, Nessus has not tested for these.

Solution

Upgrade to an Observium version released on or after 2016/10/26.

Plugin Details

Severity: Critical

ID: 95391

File Name: observium_unserialize.nasl

Version: 1.7

Type: remote

Family: CGI abuses

Published: 11/29/2016

Updated: 11/15/2018

Supported Sensors: Nessus

Vulnerability Information

CPE: x-cpe:/a:observium_limited:observium

Required KB Items: installed_sw/Observium

Exploited by Nessus: true

Patch Publication Date: 10/26/2016

Vulnerability Publication Date: 11/10/2016

Detections

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