Juniper Netscreen ScreenOS up to 2.6.1/3.0.3 Web Interface Username 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.
5.1$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic has been found in Juniper Netscreen ScreenOS up to 2.6.1/3.0.3. This affects an unknown function of the component Web Interface. This manipulation of the argument Username causes denial of service. The identification of this vulnerability is CVE-2002-0891. There is no exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic was found in Juniper Netscreen ScreenOS up to 2.6.1/3.0.3 (Router Operating System). Affected by this vulnerability is some unknown processing of the component Web Interface. The manipulation of the argument Username with an unknown input leads to a denial of service vulnerability. The CWE definition for the vulnerability is CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. As an impact it is known to affect availability. The summary by CVE is:

The web interface (WebUI) of NetScreen ScreenOS before 2.6.1r8, and certain 2.8.x and 3.0.x versions before 3.0.3r1, allows remote attackers to cause a denial of service (crash) via a long user name.

The bug was discovered 05/27/2002. The weakness was shared 10/04/2002 as not defined posting (Bugtraq). The advisory is shared at online.securityfocus.com. This vulnerability is known as CVE-2002-0891. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details are known, but no exploit is available.

The vulnerability was handled as a non-public zero-day exploit for at least 130 days. During that time the estimated underground price was around $5k-$25k. The commercial vulnerability scanner Qualys is able to test this issue with plugin 12148 (NetScreen Web Interface Multiple Vulnerabilities).

Upgrading to version 2.6.1r8 eliminates this vulnerability.

The vulnerability is also documented in the databases at X-Force (9186), SecurityFocus (BID 4842†), OSVDB (5059†) and Vulnerability Center (SBV-7278†). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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: 5.1

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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

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

NVD Base Score: 🔍

Exploitinginfo

Class: Denial of service
CWE: CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Netscreen ScreenOS 2.6.1r8

Timelineinfo

05/27/2002 🔍
05/27/2002 +0 days 🔍
10/04/2002 +130 days 🔍
10/04/2002 +0 days 🔍
10/04/2002 +0 days 🔍
03/13/2005 +891 days 🔍
07/23/2014 +3419 days 🔍
10/11/2025 +4097 days 🔍

Sourcesinfo

Vendor: juniper.net

Advisory: online.securityfocus.com⛔
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2002-0891 (🔍)
GCVE (CVE): GCVE-0-2002-0891
GCVE (VulDB): GCVE-100-18829
X-Force: 9186
SecurityFocus: 4842 - NetScreen ScreenOS Remote Reboot Vulnerability
OSVDB: 5059 - NetScreen - ScreenOS - Remote Reboot Vulnerability
Vulnerability Center: 7278 - DoS in NetScreen ScreenOS WebUI via Long User Name, High

Entryinfo

Created: 07/23/2014 11:39
Updated: 10/11/2025 01:04
Changes: 07/23/2014 11:39 (63), 05/30/2019 17:34 (3), 10/11/2025 01:04 (20)
Complete: 🔍
Cache ID: 216::103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Interested in the pricing of exploits?

See the underground prices here!