CVE-2016-4817
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…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (4.45%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.0
- 7.5 HIGHCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 4.45% probability · 91th percentile
- CISA KEV
- Not listed
- Affected
- dena/h2o
- Source
- vultures@jpcert.or.jp
References
- http://jvn.jp/en/jp/JVN87859762/index.htmlVendor Advisory
- http://jvndb.jvn.jp/jvndb/JVNDB-2016-000091Vendor Advisory
- https://github.com/h2o/h2o/commit/1c0808d580da09fdec5a9a74ff09e103ea058dd4
- https://github.com/h2o/h2o/pull/920Vendor Advisory
- http://jvn.jp/en/jp/JVN87859762/index.htmlVendor Advisory
- http://jvndb.jvn.jp/jvndb/JVNDB-2016-000091Vendor Advisory
- https://github.com/h2o/h2o/commit/1c0808d580da09fdec5a9a74ff09e103ea058dd4
- https://github.com/h2o/h2o/pull/920Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.