Microsoft Outlook Express up to 6 SP1 BCC Multi-Part Message information disclosure

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 was found in Microsoft Outlook Express up to 6 SP1. It has been rated as problematic. This affects an unknown part of the component BCC Multi-Part Message Handler. This manipulation causes information disclosure. This vulnerability is registered as CVE-2004-2137. Remote exploitation of the attack is possible. No exploit is available. Applying a patch is the recommended action to fix this issue.

Detailsinfo

A vulnerability has been found in Microsoft Outlook Express up to 6 SP1 (Mail Client Software) and classified as problematic. Affected by this vulnerability is an unknown function of the component BCC Multi-Part Message Handler. The manipulation with an unknown input leads to a information disclosure vulnerability. The CWE definition for the vulnerability is CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. As an impact it is known to affect confidentiality. The summary by CVE is:

Outlook Express 6.0, when sending multipart e-mail messages using the "Break apart messages larger than" setting, leaks the BCC recipients of the message to the addresses listed in the To and CC fields, which may allow remote attackers to obtain sensitive information.

The bug was discovered 08/25/2004. The weakness was published 08/20/2004 by Juha-Matti Laurio with Microsoft (Website). The advisory is shared at support.microsoft.com. This vulnerability is known as CVE-2004-2137 since 06/14/2005. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1592 for this issue.

The commercial vulnerability scanner Qualys is able to test this issue with plugin 90313 (Microsoft Outlook Express BCC Field Information Disclosure Vulnerability).

Applying a patch is able to eliminate this problem. The bugfix is ready for download at support.microsoft.com.

The vulnerability is also documented in the databases at X-Force (17098), SecurityFocus (BID 11040†), OSVDB (9167†), Secunia (SA12376†) and SecurityTracker (ID 1011067†). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

Vendor

Name

Version

License

Support

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: Information disclosure
CWE: CWE-200 / CWE-284 / CWE-266
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: Patch
Status: 🔍

0-Day Time: 🔍

Patch: support.microsoft.com

Timelineinfo

08/20/2004 🔍
08/25/2004 +5 days 🔍
08/25/2004 +0 days 🔍
08/25/2004 +0 days 🔍
08/25/2004 +0 days 🔍
08/25/2004 +0 days 🔍
08/25/2004 +0 days 🔍
08/26/2004 +0 days 🔍
12/31/2004 +127 days 🔍
06/14/2005 +165 days 🔍
06/19/2006 +370 days 🔍
07/06/2025 +6957 days 🔍

Sourcesinfo

Vendor: microsoft.com

Advisory: support.microsoft.com
Researcher: Juha-Matti Laurio
Organization: Microsoft
Status: Confirmed

CVE: CVE-2004-2137 (🔍)
GCVE (CVE): GCVE-0-2004-2137
GCVE (VulDB): GCVE-100-805
X-Force: 17098 - Microsoft Outlook Express address information disclosure, Medium Risk
SecurityFocus: 11040 - Microsoft Outlook Express BCC Field Information Disclosure Vulnerability
Secunia: 12376 - Microsoft Outlook Express "BCC:" Recipient Disclosure Weakness, Not Critical
OSVDB: 9167 - Microsoft Outlook Express BCC: Recipient Information Disclosure
SecurityTracker: 1011067
SecuriTeam: securiteam.com
Vulnerability Center: 11942 - Microsoft Outlook Express BCC Field Leakage, Medium

Entryinfo

Created: 08/25/2004 14:32
Updated: 07/06/2025 06:55
Changes: 08/25/2004 14:32 (86), 06/29/2019 09:34 (1), 07/06/2025 06:55 (17)
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 ▸

Might our Artificial Intelligence support you?

Check our Alexa App!