Citrix NetScaler 9.3/10.0/10.1 Application Delivery Controller RADIUS Authentication denial of service

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.
4.6$0-$5k0.00

Summaryinfo

A vulnerability marked as problematic has been reported in Citrix NetScaler 9.3/10.0/10.1. The affected element is an unknown function of the component Application Delivery Controller. Performing a manipulation results in denial of service (RADIUS Authentication). This vulnerability was named CVE-2013-6939. The attack may be initiated remotely. There is no available exploit. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, was found in Citrix NetScaler 9.3/10.0/10.1 (Network Management Software). This affects an unknown code of the component Application Delivery Controller. The manipulation with an unknown input leads to a denial of service vulnerability (RADIUS Authentication). CWE is classifying the issue as CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. This is going to have an impact on availability. The summary by CVE is:

Unspecified vulnerability in Citrix NetScaler Application Delivery Controller (ADC) 9.3.x before 9.3-64.4, 10.0 before 10.0-77.5, and 10.1 before 10.1-118.7 allows attackers to cause a denial of service via unknown vectors, related to "RADIUS authentication."

The weakness was presented 03/05/2014 as CTX139049 as confirmed advisory (Website). The advisory is shared at support.citrix.com. This vulnerability is uniquely identified as CVE-2013-6939 since 12/04/2013. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1499 for this issue.

The vulnerability scanner Nessus provides a plugin with the ID 73205 (Citrix NetScaler Application Delivery Controller Multiple Vulnerabilities), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Misc.. The commercial vulnerability scanner Qualys is able to test this issue with plugin 115182 (Citrix NetScaler Application Delivery Controller Multiple Vulnerabilities).

Upgrading to version 9.3-64.4, 10.0-77.5 or 101-118.7 eliminates this vulnerability.

The vulnerability is also documented in the databases at X-Force (91618), Tenable (73205), SecurityFocus (BID 66010†), Secunia (SA57279†) and Vulnerability Center (SBV-50390†). See VDB-12511, VDB-12512, VDB-12514 and VDB-12515 for similar entries. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 4.6

VulDB Base Score: 5.3
VulDB Temp Score: 4.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock

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

NVD Base Score: 🔍

Exploitinginfo

Name: RADIUS Authentication
Class: Denial of service / RADIUS Authentication
CWE: CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Unproven

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

Nessus ID: 73205
Nessus Name: Citrix NetScaler Application Delivery Controller Multiple Vulnerabilities
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: NetScaler 9.3-64.4/10.0-77.5/101-118.7

Timelineinfo

12/04/2013 🔍
03/05/2014 +91 days 🔍
03/05/2014 +0 days 🔍
03/05/2014 +0 days 🔍
03/06/2014 +1 days 🔍
03/10/2014 +4 days 🔍
03/11/2014 +1 days 🔍
06/07/2015 +453 days 🔍
05/07/2026 +3987 days 🔍

Sourcesinfo

Vendor: citrix.com

Advisory: CTX139049
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2013-6939 (🔍)
GCVE (CVE): GCVE-0-2013-6939
GCVE (VulDB): GCVE-100-12513
X-Force: 91618 - Citrix NetScaler Application Delivery Controller RADIUS denial of service, Medium Risk
SecurityFocus: 66010 - Citrix NetScaler Application Delivery Controller CVE-2013-6939 Denial of Service Vulnerability
Secunia: 57279 - Citrix NetScaler / NetScaler VPX Multiple Vulnerabilities, Less Critical
Vulnerability Center: 50390 - Citrix NetScaler ADC 9.3, 10.0, 10.1 Remote DoS Vulnerability Related to RADIUS Authentication, Medium

See also: 🔍

Entryinfo

Created: 03/10/2014 11:49
Updated: 05/07/2026 05:37
Changes: 03/10/2014 11:49 (76), 07/07/2017 17:06 (1), 06/15/2021 10:10 (2), 05/07/2026 05:37 (15)
Complete: 🔍
Committer: olku
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Interested in the pricing of exploits?

See the underground prices here!