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CVE-2004-0380

10.0 · HIGH

The MHTML protocol handler in Microsoft Outlook Express 5.5 SP2 through Outlook Express 6 SP1 allows remote attackers to bypass domain restrictions and execute arbitrary code, as demonstrated on In…

Published May 4, 2004microsoftEPSS 63.25%

Overview

CVE-2004-0380 is a high-severity vulnerability affecting microsoft outlook_express. It was published on May 4, 2004 and has a CVSS 2.0 base score of 10.0 (HIGH).

This vulnerability has a CVSS 2.0 base score of 10.0, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

The MHTML protocol handler in Microsoft Outlook Express 5.5 SP2 through Outlook Express 6 SP1 allows remote attackers to bypass domain restrictions and execute arbitrary code, as demonstrated on Internet Explorer using script in a compiled help (CHM) file that references the InfoTech Storage (ITS) protocol handlers such as (1) ms-its, (2) ms-itss, (3) its, or (4) mk:@MSITStore, aka the "MHTML URL Processing Vulnerability."

Remediation

Check the references section for vendor advisories and patches from microsoft. Update outlook_express to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected products

VendorProductVersionsStatus

References

Refsecunia.com/advisories/10523Refwww.k-otik.net/bugtraq/02.18.InternetExplorer.phpRefwww.kb.cert.org/vuls/id/323070Refwww.securityfocus.com/archive/1/354447Refwww.securityfocus.com/archive/1/358913Refwww.securityfocus.com/bid/9105Refwww.securityfocus.com/bid/9658Refwww.us-cert.gov/cas/techalerts/TA04-104A.htmlRefdocs.microsoft.com/en-us/security-updates/securitybulletins/2004/ms04-013Refexchange.xforce.ibmcloud.com/vulnerabilities/15705

How CyberStrike helps

Frequently asked questions

What is CVE-2004-0380?

CVE-2004-0380 is a high-severity vulnerability affecting microsoft outlook_express. It was published on May 4, 2004 and has a CVSS 2.0 base score of 10.0 (HIGH).

How severe is CVE-2004-0380?

This vulnerability has a CVSS 2.0 base score of 10.0, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2004-0380?

Check the references section for vendor advisories and patches from microsoft. Update outlook_express to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2004-0380?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2004-0380 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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