High severity · published May 12, 2017
CVE-2016-4864
H2O versions 2.0.3 and earlier and 2.1.0-beta2 and earlier allows remote attackers to cause a denial-of-service (DoS) via format string specifiers in a template file via fastcgi,…
7.5
CVSS
1.8%
EPSS
No
On KEV
Description
H2O versions 2.0.3 and earlier and 2.1.0-beta2 and earlier allows remote attackers to cause a denial-of-service (DoS) via format string specifiers in a template file via fastcgi, mruby, proxy, redirect or reproxy.
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)1.8% · higher than 78% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
H2
H2o · Dena
2.0.0 through 2.0.3; 2.1.0; 2.1.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2016-4864
CVE.org
https://www.cve.org/CVERecord?id=CVE-2016-4864
Patch
https://github.com/h2o/h2o/issues/1077
Third Party Advisory
https://jvn.jp/en/jp/JVN94779084/index.html
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