CVE-2004-0380

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…

published April 6, 2004

Patch now

High probability of exploitation

NVD has not assigned a CVSS score to this record. It sits in the 99.2th percentile for exploit probability.

CVSS
—
EPSS
63%
Percentile
99.2
In the wild
Unconfirmed
What it is

⚠️ A crafty little vulnerability lurks in Microsoft Outlook Express, allowing attackers to whip up arbitrary code execution just by bouncing through the MHTML protocol! Think of it like an overly friendly GPS that takes shortcuts through restricted roads, leading you straight to a hidden backdoor where mischief can happen. This vulnerability lets attackers bypass domain restrictions with the same ease as zipping past a no-entry sign. The consequences here could be significant! An attacker could exploit this flaw to run any code they wish on your system, potentially stealing sensitive information or compromising your device entirely. While no known exploits are currently circulating, the risk remains present and should be addressed.

Put simply

Think of it like an overly friendly GPS that takes shortcuts through restricted roads, leading you straight to a hidden backdoor where mischief can happen. This vulnerability lets attackers bypass domain restrictions with the same ease as zipping past a no-entry sign. This vulnerability exists in the MHTML protocol handler of Microsoft Outlook Express versions 5.5 SP2 and 6 SP1, which allows remote attackers to execute arbitrary code via crafted CHM files that reference certain InfoTech Storage protocol handlers.

What to do

The consequences here could be significant! An attacker could exploit this flaw to run any code they wish on your system, potentially stealing sensitive information or compromising your device entirely. While no known exploits are currently circulating, the risk remains present and should be addressed. To shield yourself from this vulnerability, ensure your Outlook Express is updated to the latest available version. Additionally, consider disabling the MHTML protocol if it's not needed, and always be cautious about opening unsolicited CHM files. You've got this! With a little vigilance and these steps, you can keep your system safe and sound! 🛡️

The record
Technical detail
CVSS
Not scored
CVSS v4.0
Not supplied
EPSS
0.63250 · 99.2th percentile
Published
2004-04-06T04:00Z
EPSS history
Timeline
  • 06 APR 04:00Z
    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…
    cvelistv5