CVE-2000-0226
MediumExploitation Probability (EPSS)
Very high risk93th percentile - higher than 93% of all known CVEs
Summary
IIS 4.0 allows attackers to cause a denial of service by requesting a large buffer in a POST or PUT command, leading to memory exhaustion.
Risk Assessment
An attack that can lead to denial of service may affect the availability of applications and server resources, potentially resulting in downtime for the organization.
Recommendation
It is recommended to upgrade to a newer version of IIS or implement appropriate security measures to mitigate the risk associated with this vulnerability.
Other vulnerabilities in IIS 4.0
See all- CVE-2000-0115Medium
IIS allows local users to cause a denial of service via invalid regular expressions in a Visual Basic script in an ASP page.
- CVE-2000-0071Medium
IIS 4.0 allows a remote attacker to obtain the real pathname of the document root by requesting non-existent files with .ida or .idq extensions.
- CVE-1999-1223Medium
IIS 3.0 allows remote attackers to cause a denial of service via a request to an ASP page in which the URL contains a large number of / (forward slash) characters.
- CVE-1999-1233High
IIS 4.0 does not properly restrict access for the initial session request from a user's IP address if the address does not resolve to a DNS domain. This is known as the 'Domain Resolution' vulnerability.
- CVE-2000-0024Medium
IIS does not properly canonicalize URLs, potentially allowing remote attackers to bypass access restrictions in third-party software via escape characters.
- CVE-1999-0867Medium
Vulnerability in IIS 4.0 allows a denial of service attack by flooding the server with HTTP requests containing malformed headers.
- CVE-1999-0874High
Buffer overflow in IIS 4.0 allows remote attackers to cause a denial of service via a malformed request for files with .HTR, .IDC, or .STM extensions.
- CVE-1999-0407High
By default, IIS 4.0 has a virtual directory /IISADMPWD which contains files that can be used as proxies for brute force password attacks, or to identify valid users on the system.
- CVE-1999-0450High
In IIS, an attacker could determine a real path using a request for a non-existent URL that would be interpreted by Perl (perl.exe).
- CVE-1999-0449High
The ExAir sample site in IIS 4 allows remote attackers to cause a denial of service (CPU consumption) via a direct request to the (1) advsearch.asp, (2) query.asp, or (3) search.asp scripts.
Original NVD description (English source)
IIS 4.0 allows attackers to cause a denial of service by requesting a large buffer in a POST or PUT command which consumes memory, aka the "Chunked Transfer Encoding Buffer Overflow Vulnerability."