VDB-13010 · CVE-2014-0353 · VU#939260

ZyXEL Wireless N300 NetUSB 1.00(bfq.6)c0 Security Restriction improper authentication

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.
4.8	$0-$5k	0.00

Summaryinfo

A vulnerability was found in ZyXEL Wireless N300 NetUSB 1.00(bfq.6)c0 and classified as critical. This affects an unknown function of the component Security Restriction Handler. Such manipulation with the input %2F leads to improper authentication. This vulnerability is referenced as CVE-2014-0353. Furthermore, an exploit is available.

Detailsinfo

A vulnerability was found in ZyXEL Wireless N300 NetUSB 1.00(bfq.6)c0 and classified as critical. Affected by this issue is an unknown code of the component Security Restriction Handler. The manipulation with the input value %2F leads to a improper authentication vulnerability. Using CWE to declare the problem leads to CWE-287. When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct. Impacted is integrity. CVE summarizes:

The ZyXEL Wireless N300 NetUSB NBG-419N router with firmware 1.00(BFQ.6)C0 allows remote attackers to bypass authentication by using %2F sequences in place of / (slash) characters.

The weakness was published 04/15/2014 as VU#939260 as not defined vulnerability note (CERT.org). The advisory is available at kb.cert.org. This vulnerability is handled as CVE-2014-0353 since 12/05/2013. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Technical details as well as a public exploit are known.

After immediately, there has been an exploit disclosed. The exploit is available at kb.cert.org. It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 82 days. During that time the estimated underground price was around $5k-$25k. The advisory illustrates:

Authentication for content located in any subdirectory of the web root may be bypassed by escaping the "/" characters in the URL. For example, curl -v "http://<deviceip>/local%2Fadvance%2Fwlan.asp"

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the databases at X-Force (92616) and SecurityFocus (BID 66794†). Similar entries are available at VDB-13011, VDB-13012 and VDB-13013. If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Vendor

ZyXEL

Name

Wireless N300 NetUSB

Version

1.00(bfq.6)c0

License

commercial

Website

Vendor: https://www.zyxel.com/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 4.8

VulDB Base Score: 5.3
VulDB Temp Score: 4.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

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

NVD Base Score: 🔍

Exploitinginfo

Class: Improper authentication
CWE: CWE-287
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍
Exploit Delay Time: 🔍

Timelineinfo

12/05/2013 🔍
01/23/2014 +49 days 🔍
04/11/2014 +78 days 🔍
04/15/2014 +4 days 🔍
04/15/2014 +0 days 🔍
04/15/2014 +0 days 🔍
04/22/2014 +7 days 🔍
05/10/2026 +4401 days 🔍

Sourcesinfo

Vendor: zyxel.com

Advisory: VU#939260
Status: Not defined

CVE: CVE-2014-0353 (🔍)
GCVE (CVE): GCVE-0-2014-0353
GCVE (VulDB): GCVE-100-13010
CERT: 🔍
X-Force: 92616 - The ZyXEL Wireless N300 NetUSB NBG-419N router security bypass, Medium Risk
SecurityFocus: 66794 - ZyXEL NBG-419N Router Multiple Security Vulnerabilities

scip Labs: https://www.scip.ch/en/?labs.20161013
See also: 🔍

Entryinfo

Created: 04/22/2014 10:23
Updated: 05/10/2026 15:43
Changes: 04/22/2014 10:23 (66), 08/19/2024 07:27 (17), 05/10/2026 15:43 (1)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.