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jvnJapan Vulnerability NotesJVN:93226941
HistoryJun 04, 2018 - 12:00 a.m.

JVN#93226941: H2O vulnerable to buffer overflow

2018-06-0400:00:00
Japan Vulnerability Notes
jvn.jp
35

CVSS2

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:N/AC:L/Au:N/C:P/I:P/A:P

CVSS3

9.8

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS

0.031

Percentile

91.2%

H2O is open source web server software. H2O contains a buffer overflow vulnerability (CWE-119) due to a processing flaw in the output of Access Log.

Impact

A remote attacker may be able to cause a denial-of-service (DoS) condition or may execute arbitrary code.

Solution

Update the Software
Update to the latest version according to the information provided by the developer.

Products Affected

  • H2O version 2.2.4 and earlier

CVSS2

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:N/AC:L/Au:N/C:P/I:P/A:P

CVSS3

9.8

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS

0.031

Percentile

91.2%