Vulnerability Details : CVE-2016-8740

The mod_http2 module in the Apache HTTP Server 2.4.17 through 2.4.23, when the Protocols configuration includes h2 or h2c, does not restrict request-header length, which allows remote attackers to cause a denial of service (memory consumption) via crafted CONTINUATION frames in an HTTP/2 request.
Published 2016-12-05 19:59:00
Updated 2021-06-06 11:15:20
Source Apache Software Foundation
View at NVD,   CVE.org
Vulnerability category: Input validationDenial of service

Products affected by CVE-2016-8740

Threat overview for CVE-2016-8740

Top countries where our scanners detected CVE-2016-8740
Top open port discovered on systems with this issue 80
IPs affected by CVE-2016-8740 509,299
Threat actors abusing to this issue? Yes
Find out if you* are affected by CVE-2016-8740!
*Directly or indirectly through your vendors, service providers and 3rd parties. Powered by attack surface intelligence from SecurityScorecard.

Exploit prediction scoring system (EPSS) score for CVE-2016-8740

EPSS FAQ
14.75%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 96 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2016-8740

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
5.0
 MEDIUM AV:N/AC:L/Au:N/C:N/I:N/A:P
10.0
2.9
 NIST
7.5
 HIGH CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
3.9
3.6
 NIST

CWE ids for CVE-2016-8740

  • The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.
    Assigned by: nvd@nist.gov (Primary)
  • Assigned by: nvd@nist.gov (Primary)

References for CVE-2016-8740

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