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IIS WebDav Lock Method Memory Leak DoS Vulnerability

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IIS WebDav Lock Method Memory Leak DoS Vulnerability

Severity
8
CVSS
(AV:N/AC:L/Au:N/C:N/I:N/A:C)
Published
11/01/2004
Created
07/25/2018
Added
11/01/2004
Modified
07/31/2012

Description

A flaw in the WebDav extensions (specifically httpext.dll versions prior to 0.9.3940.21) allow a remote attacker to carry out a DoS by repeatedly requesting nonexistent files via the HTTP LOCK method.

This leads to a complete consumption of memory resources, eventually crashing the host and requiring a restart.

Note that an attacker may deliberately prevent the server from restarting, thus indefinitely prolonging the denial of service.

Solution(s)

  • http-iis-0041

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