What is CVE-2016-4864?

CVE-2016-4864 is a high-severity vulnerability in Dena H2o, classified under Use of Externally-Controlled Format String. CVSS score: 7.5/10. Published 2017-05-12.

How severe is CVE-2016-4864?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Dena H2o

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, mruby, proxy, redirect or reproxy.

EPSS: 0.016 (82.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Dena H2o — versions 2.1.0
Kazuho Oku H2o — versions versions 2.1.0-beta2 and earlier, versions 2.0.3 and earlier

Weakness classification (CWE)

CWE-134 — Use of Externally-Controlled Format String

References

vultures@jpcert.or.jp (x_refsource_CONFIRM, Patch, Third Party Advisory)
vultures@jpcert.or.jp (VDB Entry, Third Party Advisory, x_refsource_JVN, third-party-advisory)

Frequently asked questions

What is CVE-2016-4864?: CVE-2016-4864 is a high-severity vulnerability in Dena H2o, classified under Use of Externally-Controlled Format String. CVSS score: 7.5/10. Published 2017-05-12.
How severe is CVE-2016-4864?: High severity. CVSS v3 base score is 7.5 out of 10.