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Apache HTTPD HTTP/2 'SETTINGS' Data Processing DoS Vulnerability (Windows)

Information

Severity

Severity

Medium

Family

Family

Web Servers

CVSSv2 Base

CVSSv2 Base

4.3

CVSSv2 Vector

CVSSv2 Vector

AV:N/AC:M/Au:N/C:N/I:N/A:P

Solution Type

Solution Type

Vendor Patch

Created

Created

3 years ago

Modified

Modified

3 years ago

Share

Summary

This host is running Apache HTTP Server and is prone to denial-of-service vulnerability

Insight

Insight

The flaw is due to an improper processing of specially crafted and continuous SETTINGS data for an ongoing HTTP/2 connection to cause the target service to fail to timeout.

Affected Software

Affected Software

Apache HTTP Server versions 2.4.34, 2.4.33, 2.4.30, 2.4.29, 2.4.28, 2.4.27, 2.4.26, 2.4.25, 2.4.23, 2.4.20, 2.4.18.

Detection Method

Detection Method

Checks if a vulnerable version is present on the target host.

Solution

Solution

Upgrade to Apache HTTP Server 2.4.35 or later. Please see the references for more information.

Common Vulnerabilities and Exposures (CVE)

References

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Citations 1. Costs and Consequences of Gaps in Vulnerability Response, Ponemom Institute 2. Cost of a Data Breach Report 2021, IBM

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