Working Resources Inc. Badblue Personal 1.7.3 isapi.cpp OnParseError memory corruption

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.
6.6$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, has been found in Working Resources Inc. Badblue Personal 1.7.3. This affects the function CHttpServer::OnParseError of the file isapi.cpp. This manipulation causes memory corruption. This vulnerability is registered as CVE-2002-1973. Furthermore, an exploit is available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability has been found in Working Resources Inc. Badblue Personal 1.7.3 and classified as critical. Affected by this vulnerability is the function CHttpServer::OnParseError of the file isapi.cpp. The manipulation with an unknown input leads to a memory corruption vulnerability. The CWE definition for the vulnerability is CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

Buffer overflow in CHttpServer::OnParseError in the ISAPI extension (Isapi.cpp) when built using Microsoft Foundation Class (MFC) static libraries in Visual C++ 5.0, and 6.0 before SP3, as used in multiple products including BadBlue, allows remote attackers to cause a denial of service (access violation and crash) and possibly execute arbitrary code via a long query string that causes a parsing error.

The bug was discovered 07/09/2002. The weakness was published 12/31/2002 by Matthew Murphy (mattmurphy) as not defined posting (Bugtraq). It is possible to read the advisory at archives.neohapsis.com. This vulnerability is known as CVE-2002-1973 since 06/29/2005. 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.

A public exploit has been developed in ANSI C. It is possible to download the exploit at securityfocus.com. It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 175 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 86360 (Working Resources BadBlue ISAPI Denial of Service Vulnerability).

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the databases at X-Force (9529), Exploit-DB (21601), SecurityFocus (BID 5188†), OSVDB (60020†) and Vulnerability Center (SBV-10500†). 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
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock

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

NVD Base Score: 🔍

Exploitinginfo

Class: Memory corruption
CWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

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

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

Qualys ID: 🔍
Qualys Name: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

07/08/2002 🔍
07/08/2002 +0 days 🔍
07/09/2002 +1 days 🔍
12/31/2002 +175 days 🔍
12/31/2002 +0 days 🔍
06/29/2005 +911 days 🔍
02/28/2006 +244 days 🔍
08/05/2014 +3080 days 🔍
08/31/2025 +4044 days 🔍

Sourcesinfo

Advisory: archives.neohapsis.com
Researcher: Matthew Murphy (mattmurphy)
Status: Confirmed

CVE: CVE-2002-1973 (🔍)
GCVE (CVE): GCVE-0-2002-1973
GCVE (VulDB): GCVE-100-19615
X-Force: 9529
SecurityFocus: 5188 - Microsoft Foundation Class Library ISAPI Buffer Overflow Vulnerability
OSVDB: 60020 - Microsoft Foundation Class Library, Buffer Overflow in ISAPI Class
Vulnerability Center: 10500 - Microsoft Foundation Class Library Buffer Overflow via ISAPI Extension, High

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

Entryinfo

Created: 08/05/2014 11:27
Updated: 08/31/2025 19:30
Changes: 08/05/2014 11:27 (65), 06/14/2019 18:32 (5), 06/07/2025 14:22 (19), 08/31/2025 19:30 (2)
Complete: 🔍
Cache ID: 216::103

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

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Want to know what is going to be exploited?

We predict KEV entries!