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Tenable Nessus 5.2.7 Parameter Tampering / Authentication Bypass

Tenable Nessus 5.2.7 Parameter Tampering / Authentication Bypass
Posted Jul 21, 2014
Authored by Robert Gilbert

Tenable Nessus versions 5.2.3 through 5.2.7 suffer from authentication bypass vulnerabilities via parameter tampering.

tags | exploit, vulnerability, bypass
advisories | CVE-2014-4980
MD5 | 46912f28ccb14f9367fbd47370fd80de

Tenable Nessus 5.2.7 Parameter Tampering / Authentication Bypass

Change Mirror Download
Product: Nessus
Vendor: Tenable Network Security‎
Version: Nessus 5.2.3-5.2.7 - Web UI 2.3.4 (potentially lower)
Vendor Notified Date: June 24, 2014
Vendor Resolved Date: June 25, 2014
Release Date: July 18, 2014
Risk: Medium
Authentication: Not Required
Remote: Yes

Description:
A parameter tampering vulnerability exists in Nessus 5.2.7 and potentially below that allows remote attackers to retrieve potentially sensitive information from the server via the Nessus Web UI. By not checking each parameter, an attacker can retrieve information meant for authenticated users.
Successful exploitation of this vulnerability resulted in retrieving the following data without authentication, which can assist an attacker to launching further attacks:
Plugin Set, Server uuid, Web Server Version, Nessus UI Version, Nessus Type, Notifications, MSP, Capabilities, Multi Scanner, Multi User, Tags, Reset Password, Report Diff, Report Email Config, Report Email, PCI Upload, Plugin Rules, Plugin Set, Idle Timeout, Scanner Boot time, Server Version, Feed, and Status.

Exploit steps for proof-of-concept:
1. Navigate to http://vulnerablehost.com/server/properties?token= and observe the returned content.
2. Navigate to http://vulnerablehost.com/server/properties?token=1 and observe the newly returned content meant for authenticated sessions.

Vendor Response: Fix was added to Web UI 2.3.5 on June 25, 2014.

Reference:
CVE-2014-4980
http://www.halock.com/blog/cve-2014-4980-parameter-tampering-nessus-web-ui/
http://www.tenable.com/security/tns-2014-05

Credit:
Robert Gilbert
HALOCK Security Labs
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