Psychoid psyBNC 2.3 Trusted Message authentication spoofing

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.6$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, has been found in Psychoid psyBNC 2.3. This affects an unknown function of the component Trusted Message Handler. This manipulation with the input [B] causes authentication spoofing. This vulnerability appears as CVE-2002-0197. In addition, an exploit is available. It is recommended to apply a patch to fix this issue.

Detailsinfo

A vulnerability has been found in Psychoid psyBNC 2.3 and classified as critical. Affected by this vulnerability is an unknown functionality of the component Trusted Message Handler. The manipulation with the input value [B] leads to a authentication spoofing vulnerability. The CWE definition for the vulnerability is CWE-290. This attack-focused weakness is caused by incorrectly implemented authentication schemes that are subject to spoofing attacks. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

psyBNC 2.3 beta and earlier allows remote attackers to spoof encrypted, trusted messages by sending lines that begin with the "[B]" sequence, which makes the message appear legitimate.

The bug was discovered 01/22/2002. The weakness was presented 05/16/2002 (Website). It is possible to read the advisory at marc.info. This vulnerability is known as CVE-2002-0197. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details and also a public exploit are known.

It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 114 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 38095 (psyBNC Encrypted Chat Injection Vulnerability).

Applying a patch is able to eliminate this problem.

The vulnerability is also documented in the databases at X-Force (7985), SecurityFocus (BID 3931†), OSVDB (2032†) and Vulnerability Center (SBV-6618†). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 6.6

VulDB Base Score: 7.3
VulDB Temp Score: 6.6
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: Authentication spoofing
CWE: CWE-290 / CWE-287
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

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

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: Patch
Status: 🔍

0-Day Time: 🔍

Timelineinfo

01/22/2002 🔍
01/22/2002 +0 days 🔍
01/22/2002 +0 days 🔍
05/16/2002 +114 days 🔍
05/16/2002 +0 days 🔍
12/28/2004 +957 days 🔍
07/11/2014 +3482 days 🔍
09/22/2025 +4090 days 🔍

Sourcesinfo

Advisory: marc.info
Status: Confirmed

CVE: CVE-2002-0197 (🔍)
GCVE (CVE): GCVE-0-2002-0197
GCVE (VulDB): GCVE-100-18103
X-Force: 7985
SecurityFocus: 3931 - psyBNC Encrypted Chat Injection Vulnerability
OSVDB: 2032 - CVE-2002-0197 - psyBNC - Spoofing Issue
Vulnerability Center: 6618 - Psychoid psyBNC 2.3 Allows Spoof Encrypted Messages, Medium

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

Entryinfo

Created: 07/11/2014 13:54
Updated: 09/22/2025 00:14
Changes: 07/11/2014 13:54 (62), 06/03/2019 17:55 (3), 09/22/2025 00:14 (20)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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