WordPress up to 4.8.1 Customizer Theme 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.
6.7$0-$5k0.00

A vulnerability was found in WordPress up to 4.8.1 (Content Management System). It has been classified as critical. This affects some unknown processing of the component Customizer. The manipulation as part of a Theme 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 confidentiality, and integrity. The summary by CVE is:

Before version 4.8.2, WordPress allowed a Directory Traversal attack in the Customizer component via a crafted theme filename.

The bug was discovered 09/19/2017. The weakness was presented 09/23/2017 by Security Team (Alex) with WordPress Security Team (Website). It is possible to read the advisory at securityfocus.com. This vulnerability is uniquely identified as CVE-2017-14722 since 09/23/2017. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1006 according to MITRE ATT&CK.

The vulnerability was handled as a non-public zero-day exploit for at least 4 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 103793 (Debian DSA-3997-1 : wordpress - 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 176177 (Debian Security Update for wordpress (DSA 3997-1)).

Upgrading to version 4.7.6 or 4.8.2 eliminates this vulnerability. The upgrade is hosted for download at core.trac.wordpress.org. A possible mitigation has been published 3 weeks after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (103793). See 107039, 107040, 107041 and 107042 for similar entries.

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.0
VulDB Meta Temp Score: 6.8

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

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
unlockunlockunlockunlockunlockunlock
unlockunlockunlockunlockunlockunlock
unlockunlockunlockunlockunlockunlock

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

NVD Base Score: 🔍

Exploitinginfo

Class: Path traversal
CWE: CWE-22
ATT&CK: T1006

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Dayunlockunlockunlockunlock
Todayunlockunlockunlockunlock

Nessus ID: 103793
Nessus Name: Debian DSA-3997-1 : wordpress - security update
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 53378
OpenVAS Name: Debian Security Advisory DSA 3997-1 (wordpress - security update)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Upgrade: WordPress 4.7.6/4.8.2

Timelineinfo

09/19/2017 🔍
09/19/2017 +0 days 🔍
09/23/2017 +4 days 🔍
09/23/2017 +0 days 🔍
09/23/2017 +0 days 🔍
09/24/2017 +1 days 🔍
10/10/2017 +16 days 🔍
10/12/2017 +2 days 🔍
01/14/2021 +1190 days 🔍

Sourcesinfo

Product: wordpress.com

Advisory: 41397⛔
Researcher: Security Team (Alex)
Organization: WordPress Security Team
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2017-14722 (🔍)
OVAL: 🔍

SecurityTracker: 1039553
SecurityFocus: 100912 - WordPress Prior to 4.8.2 Multiple Input Validation Security Vulnerabilities

See also: 🔍

Entryinfo

Created: 09/24/2017 09:45
Updated: 01/14/2021 08:40
Changes: 09/24/2017 09:45 (83), 06/07/2020 21:08 (4), 01/14/2021 08:40 (3)
Complete: 🔍

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Do you need the next level of professionalism?

Upgrade your account now!