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CVE-2016-8740

UnknownEPSS 79.07%

Last modified

CVE-2016-8740 is a vulnerability of currently unknown severity. 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.. EPSS estimates a 79.07% chance of exploitation in the next 30 days.

Description

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.

Metrics

EPSS Probability
79.07%

99.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
ApacheHttp Server2.4.17
ApacheHttp Server2.4.18
ApacheHttp Server2.4.19
ApacheHttp Server2.4.20
ApacheHttp Server2.4.21
ApacheHttp Server2.4.22
ApacheHttp Server2.4.23

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is 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.
How severe is CVE-2016-8740?
Severity scoring for CVE-2016-8740 is pending analysis. The EPSS model estimates a 79.07% probability of exploitation in the next 30 days.
How do I fix CVE-2016-8740?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2016-8740?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST