CVE-2016-4817

Description

lib/http2/connection.c in H2O before 1.7.3 and 2.x before 2.0.0-beta5 mishandles HTTP/2 disconnection, which allows remote attackers to cause a denial of service (use-after-free and application crash) or possibly execute arbitrary code via a crafted packet.

7.5

CVSS

Severity: High

CVSS 3.0 •

CVSS 2.0 •

EPSS 7.52% Top 10%

Vendor Advisory jvn.jp Vendor Advisory jvn.jp Vendor Advisory github.com

Affected: n/a n/a

References

Link	Tags
https://github.com/h2o/h2o/commit/1c0808d580da09fdec5a9a74ff09e103ea058dd4
http://jvn.jp/en/jp/JVN87859762/index.html	third party advisory vendor advisory
https://github.com/h2o/h2o/pull/920	vendor advisory
http://jvndb.jvn.jp/jvndb/JVNDB-2016-000091	third party advisory vendor advisory

Frequently Asked Questions

What is the severity of CVE-2016-4817?: CVE-2016-4817 has been scored as a high severity vulnerability.
How to fix CVE-2016-4817?: To fix CVE-2016-4817, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2016-4817 being actively exploited in the wild?: It is possible that CVE-2016-4817 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~8% probability that this vulnerability will be exploited by malicious actors in the next 30 days.

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