VDB-121478 · CVE-2018-14056 · Qualys 176435

ZNC up to 1.7.0 Web Skin Name 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.

A vulnerability was found in ZNC up to 1.7.0 and classified as critical. Affected by this issue is an unknown function of the component Web Skin Name Handler. The manipulation with the input value ../ leads to a path traversal vulnerability. Using CWE to declare the problem leads to 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. Impacted is confidentiality, and integrity.

The bug was discovered 07/14/2018. The weakness was presented 07/15/2018 (Website). The advisory is available at github.com. This vulnerability is handled as CVE-2018-14056 since 07/14/2018. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1006 by the MITRE ATT&CK project.

The vulnerability scanner Nessus provides a plugin with the ID 111175 (Debian DSA-4252-1 : znc - security update), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Debian Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 176435 (Debian Security Update for znc (DSA 4252-1)).

Upgrading to version 1.7.1-rc1 eliminates this vulnerability. A possible mitigation has been published 3 days after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (111175). See 121477 for similar entry.





CPE 2.3info

CPE 2.2info


VulDB Meta Base Score: 5.9
VulDB Meta Temp Score: 5.8

VulDB Base Score: 6.5
VulDB Temp Score: 6.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.3
NVD Vector: 🔍



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

NVD Base Score: 🔍


Class: Path traversal
ATT&CK: T1006

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍


Nessus ID: 111175
Nessus Name: Debian DSA-4252-1 : znc - security update
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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


Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
Exposure Time: 🔍

Upgrade: ZNC 1.7.1-rc1
Patch: github.com


07/14/2018 🔍
07/14/2018 +0 days 🔍
07/14/2018 +0 days 🔍
07/15/2018 +1 days 🔍
07/15/2018 +0 days 🔍
07/18/2018 +3 days 🔍
07/20/2018 +2 days 🔍
04/09/2023 +1724 days 🔍


Advisory: a4a5aeeb17d32937d8c7d743dae9a4cc755ce773
Status: Not defined

CVE: CVE-2018-14056 (🔍)
See also: 🔍


Created: 07/15/2018 04:34 PM
Updated: 04/09/2023 09:33 AM
Changes: 07/15/2018 04:34 PM (73), 03/05/2020 09:33 AM (2), 04/09/2023 09:33 AM (5)
Complete: 🔍


No comments yet. Languages: en.

Please log in to comment.

Want to stay up to date on a daily basis?

Enable the mail alert feature now!