Parachat Server 4.0 Login denial of service

CVSS Meta Temp Score
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Current Exploit Price (≈)
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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.
5.3$0-$5k0.00

Summaryinfo

A vulnerability was found in Parachat Server 4.0 and classified as problematic. Affected by this vulnerability is an unknown functionality of the component Login Handler. Executing a manipulation can lead to denial of service. This vulnerability is tracked as CVE-2002-1849. No exploit exists.

Detailsinfo

A vulnerability was found in Parachat Server 4.0 (Chat Software). It has been declared as problematic. This vulnerability affects an unknown code of the component Login Handler. The manipulation 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. CVE summarizes:

ParaChat Server 4.0 does not log users off if the browser s back button is used, which allows remote attackers to cause a denial of service by repeatedly logging into a chat room, hitting the back button, then logging into the same chat room as a different user, which fills the chat room with invalid users.

The bug was discovered 07/31/2002. The weakness was disclosed 12/31/2002 by Matt (Website). The advisory is shared for download at securityfocus.com. This vulnerability was named CVE-2002-1849 since 06/29/2005. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are neither technical details nor an exploit publicly available.

The vulnerability was handled as a non-public zero-day exploit for at least 153 days. During that time the estimated underground price was around $0-$5k. The commercial vulnerability scanner Qualys is able to test this issue with plugin 10790 (ParaChat Phantom User Denial of Service Vulnerability).

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 (9735), SecurityFocus (BID 5370†), OSVDB (45284†) and Vulnerability Center (SBV-13577†). Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

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

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

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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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: 🔍

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Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

07/31/2002 🔍
07/31/2002 +0 days 🔍
07/31/2002 +0 days 🔍
12/31/2002 +153 days 🔍
12/31/2002 +0 days 🔍
06/29/2005 +911 days 🔍
12/24/2006 +543 days 🔍
08/04/2014 +2780 days 🔍
09/01/2025 +4046 days 🔍

Sourcesinfo

Advisory: securityfocus.com⛔
Researcher: Matt
Status: Not defined

CVE: CVE-2002-1849 (🔍)
GCVE (CVE): GCVE-0-2002-1849
GCVE (VulDB): GCVE-100-19492
X-Force: 9735
SecurityFocus: 5370 - ParaChat Phantom User Denial Of Service Vulnerability
OSVDB: 45284 - ParaChat - Phantom User Denial Of Service Vulnerability
Vulnerability Center: 13577 - ParaChat Denial of Service via Logging with Multiple Users, Medium

Entryinfo

Created: 08/04/2014 17:15
Updated: 09/01/2025 16:45
Changes: 08/04/2014 17:15 (58), 07/12/2019 16:18 (5), 09/01/2025 16:45 (18)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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