Strix
26.1K

CVE-2016-6817

HIGHCVSS 7.5/10EPSS 7.19%

Last modified

CVE-2016-6817 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. The HTTP/2 header parser in Apache Tomcat 9.0.0.M1 to 9.0.0.M11 and 8.5.0 to 8.5.6 entered an infinite loop if a header was received that was larger than the available buffer. This made a denial of service attack possible.. EPSS estimates a 7.19% chance of exploitation in the next 30 days.

Description

The HTTP/2 header parser in Apache Tomcat 9.0.0.M1 to 9.0.0.M11 and 8.5.0 to 8.5.6 entered an infinite loop if a header was received that was larger than the available buffer. This made a denial of service attack possible.

Metrics

CVSS 3.1
7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability
7.19%

93.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersionsUpdate
ApacheTomcat8.5.0—
ApacheTomcat8.5.1—
ApacheTomcat8.5.2—
ApacheTomcat8.5.3—
ApacheTomcat8.5.4—
ApacheTomcat8.5.5—
ApacheTomcat8.5.6—
ApacheTomcat9.0.0Milestone1

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2016-6817?
The HTTP/2 header parser in Apache Tomcat 9.0.0.M1 to 9.0.0.M11 and 8.5.0 to 8.5.6 entered an infinite loop if a header was received that was larger than the available buffer. This made a denial of service attack possible.
How severe is CVE-2016-6817?
CVE-2016-6817 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 7.19% probability of exploitation in the next 30 days.
How do I fix CVE-2016-6817?
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-2016-6817?

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

Scan your code now

Source: NVD / NIST