CVE-2004-1134

Buffer overflow in the Microsoft W3Who ISAPI (w3who.dll) allows remote attackers to cause a denial of service and possibly execute arbitrary code via a long…

published December 8, 2004

Patch now

High probability of exploitation

NVD has not assigned a CVSS score to this record. It sits in the 99.4th percentile for exploit probability.

CVSS
—
EPSS
72%
Percentile
99.4
In the wild
Unconfirmed
What it is

⚠️ A crafty buffer overflow lurking in w3who.dll could leave your server gasping for air! This vulnerability lets attackers exploit overly long query strings—like trying to stuff a large suitcase into a tiny rental car. 🚗 Think of this vulnerability like a narrow doorway that can only fit certain sizes. If someone tries to push through an oversized package, it blocks the entrance, causing a traffic jam—or in this case, a denial of service. An attacker could send a long query string that overwhelms the server, causing it to crash or, in a worst-case scenario, execute harmful code. This could lead to unauthorized access and serious disruptions, leaving your system vulnerable to further attacks.

Put simply

Think of this vulnerability like a narrow doorway that can only fit certain sizes. If someone tries to push through an oversized package, it blocks the entrance, causing a traffic jam—or in this case, a denial of service. A buffer overflow in the Microsoft W3Who ISAPI (w3who.dll) allows remote attackers to manipulate the server's memory by sending excessively long query strings, potentially leading to arbitrary code execution or denial of service.

What to do

An attacker could send a long query string that overwhelms the server, causing it to crash or, in a worst-case scenario, execute harmful code. This could lead to unauthorized access and serious disruptions, leaving your system vulnerable to further attacks. To mitigate this risk, ensure that your server's w3who.dll is updated to the latest version. Regularly review your server configurations and implement input validation to reject overly long query strings. You've got this! With a little proactive maintenance, you'll keep your server safe and sound. 🛡️

The record
Technical detail
CVSS
Not scored
CVSS v4.0
Not supplied
EPSS
0.72326 · 99.4th percentile
Published
2004-12-08T05:00Z
EPSS history
Timeline
  • 08 DEC 05:00Z
    Buffer overflow in the Microsoft W3Who ISAPI (w3who.dll) allows remote attackers to cause a denial of service and possibly execute arbitrary code via a long…
    cvelistv5