High severity · published Jun 19, 2016
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…
7.5
CVSS
4.4%
EPSS
No
On KEV
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 vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)4.4% · higher than 91% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
H2
H2o · Dena
through 1.7.2; through 2.0.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2016-4817
CVE.org
https://www.cve.org/CVERecord?id=CVE-2016-4817
Vendor Advisory
http://jvn.jp/en/jp/JVN87859762/index.html
Vendor Advisory
http://jvndb.jvn.jp/jvndb/JVNDB-2016-000091
github.com
https://github.com/h2o/h2o/commit/1c0808d580da09fdec5a9a74ff09e103ea058dd4
Vendor Advisory
https://github.com/h2o/h2o/pull/920
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