[Japanese]

JVNDB-2017-000249

Multiple vulnerabilities in H2O

Overview

H2O is an open source web server software. H2O contains multiple vulnerabilities listed below.

* A Denial-of-service (DoS) due to a flaw in processing HTTP/1 header (CWE-20) - CVE-2017-10868
* Stack-based buffer overflow (CWE-121) - CVE-2017-10869
* A Denial-of-service (DoS) due to a flaw in outputting of the access log (CWE-118) - CVE-2017-10872
* A Denial-of-service (DoS) due to a flaw in processing HTTP/2 header (CWE-20) - CVE-2017-10908

Kazuho Oku reported this vulnerability to IPA to notify users of its solution through JVN. JPCERT/CC and Kazuho Oku coordinated under the Information Security Early Warning Partnership.
CVSS Severity (What is CVSS?)

Base Metrics: 5.0 (Medium) [IPA Score]
  • Access Vector: Network
  • Access Complexity: Low
  • Authentication: None
  • Confidentiality Impact: None
  • Integrity Impact: None
  • Availability Impact: Partial

CVSS V3 Severity:
Base Metrics: 5.3 (Medium) [IPA Score]
  • Attack Vector: Network
  • Attack Complexity: Low
  • Privileges Required: None
  • User Interaction: None
  • Scope: Unchanged
  • Confidentiality Impact: None
  • Integrity Impact: None
  • Availability Impact: Low
The above CVSS base scores have been assigned for CVE-2017-10868.

Base Metrics: 4.3 (Medium) [IPA Score]
  • Access Vector: Network
  • Access Complexity: Medium
  • Authentication: None
  • Confidentiality Impact: None
  • Integrity Impact: None
  • Availability Impact: Partial

CVSS V3 Severity:
Base Metrics: 3.7 (Low) [IPA Score]
  • Attack Vector: Network
  • Attack Complexity: High
  • Privileges Required: None
  • User Interaction: None
  • Scope: Unchanged
  • Confidentiality Impact: None
  • Integrity Impact: None
  • Availability Impact: Low
The above CVSS base scores have been assigned for CVE-2017-10869.

Base Metrics: 3.5 (Low) [IPA Score]
  • Access Vector: Network
  • Access Complexity: Medium
  • Authentication: Single
  • Confidentiality Impact: None
  • Integrity Impact: None
  • Availability Impact: Partial

CVSS V3 Severity:
Base Metrics: 3.1 (Low) [IPA Score]
  • Attack Vector: Network
  • Attack Complexity: High
  • Privileges Required: Low
  • User Interaction: None
  • Scope: Unchanged
  • Confidentiality Impact: None
  • Integrity Impact: None
  • Availability Impact: Low
The above CVSS base scores have been assigned for CVE-2017-10872.

Base Metrics: 5.0 (Medium) [IPA Score]
  • Access Vector: Network
  • Access Complexity: Low
  • Authentication: None
  • Confidentiality Impact: None
  • Integrity Impact: None
  • Availability Impact: Partial

CVSS V3 Severity:
Base Metrics: 5.3 (Medium) [IPA Score]
  • Attack Vector: Network
  • Attack Complexity: Low
  • Privileges Required: None
  • User Interaction: None
  • Scope: Unchanged
  • Confidentiality Impact: None
  • Integrity Impact: None
  • Availability Impact: Low
The above CVSS base scores have been assigned for CVE-2017-10908.
Affected Products


Kazuho Oku
  • H2O version 2.2.2 and earlier (CVE-2017-10868, CVE-2017-10869)
  • H2O version 2.2.3 and earlier (CVE-2017-10872, CVE-2017-10908)

Impact

A denial-of-service (DoS) attack to a server may be conducted by an unauthenticated remote attacker.
Solution

[Update the Software]
Update to the latest version according to the information provided by the developer.
Vendor Information

Kazuho Oku
CWE (What is CWE?)

  1. Improper Input Validation(CWE-20) [IPA Evaluation]
CVE (What is CVE?)

  1. CVE-2017-10868
  2. CVE-2017-10869
  3. CVE-2017-10872
  4. CVE-2017-10908
References

  1. JVN : JVN#84182676
Revision History

[2017/12/18]
  Web page was published