PT-2017-8561 · H2O · H2O

Kazuho Oku · Published 2017-05-12 · Updated 2019-02-26 · CVE-2016-4864

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions H2O versions 2.0.3 and earlier H2O version 2.1.0-beta2 and earlier

Description The issue allows remote attackers to cause a denial-of-service (DoS) via format string specifiers in a template file. This can be achieved through various means such as fastcgi, mruby, proxy, redirect, or reproxy.

Recommendations For H2O versions 2.0.3 and earlier, update to a version later than 2.0.3 to resolve the issue. For H2O version 2.1.0-beta2 and earlier, update to a version later than 2.1.0-beta2 to resolve the issue.

Fix

DoS

Use of Externally-Controlled Format String

Weakness Enumeration

CWE-134

Related Identifiers

CVE-2016-4864

Affected Products

H2O

References · 5

• https://github.com/h2o/h2o/issues/1077 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2016-4864 · Security Note
• https://osv.dev/vulnerability/CVE-2016-4864 · Vendor Advisory
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-4864 · Note
• https://jvn.jp/en/jp/JVN94779084/index.html · Note