VDB-184428 · CVE-2021-33178 · Nessus 235043

Nagios XI up to 5.8.5 NagVis path traversal

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.
5.4	$0-$5k	0.00

Summaryinfo

A vulnerability was found in Nagios XI up to 5.8.5. It has been declared as critical. This affects an unknown part of the component NagVis. The manipulation results in path traversal. This vulnerability was named CVE-2021-33178. There is no available exploit. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical has been found in Nagios XI up to 5.8.5 (Log Management Software). Affected is some unknown processing of the component NagVis. The manipulation with an unknown input leads to a path traversal vulnerability. CWE is classifying the issue as CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. This is going to have an impact on integrity, and availability. CVE summarizes:

The Manage Backgrounds functionality within NagVis versions prior to 1.9.29 is vulnerable to an authenticated path traversal vulnerability. Exploitation of this results in a malicious actor having the ability to arbitrarily delete files on the local system.

The weakness was presented 10/14/2021. The advisory is shared for download at synopsys.com. This vulnerability is traded as CVE-2021-33178 since 05/18/2021. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1006.

The vulnerability scanner Nessus provides a plugin with the ID 235043 (Debian dla-4149 : nagvis - security update), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 5.8.6 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (235043). Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Log Management Software

Name

Nagios XI

Version

License

commercial

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.5
VulDB Meta Temp Score: 5.4

VulDB Base Score: 4.6
VulDB Temp Score: 4.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.5
NVD Vector: 🔍

CVSSv2info

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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Path traversal
CWE: CWE-22
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 235043
Nessus Name: Debian dla-4149 : nagvis - security update

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Nagios XI 5.8.6

Timelineinfo

05/18/2021 🔍
10/14/2021 +149 days 🔍
10/14/2021 +0 days 🔍
11/04/2025 +1482 days 🔍

Sourcesinfo

Advisory: synopsys.com
Status: Confirmed

CVE: CVE-2021-33178 (🔍)
GCVE (CVE): GCVE-0-2021-33178
GCVE (VulDB): GCVE-100-184428
scip Labs: https://www.scip.ch/en/?labs.20150108

Entryinfo

Created: 10/14/2021 21:26
Updated: 11/04/2025 09:43
Changes: 10/14/2021 21:26 (39), 10/20/2021 15:44 (1), 05/01/2025 17:12 (16), 11/04/2025 09:43 (20)
Complete: 🔍
Cache ID: 216::103