Security Bulletin: Vulnerability CVE-2018-11763 in the IBM i HTTP Server affects IBM i.

2019-12-1814:26:38

www.ibm.com

5.9 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

4.3 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

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

JSON

Summary

HTTP Server is supported by IBM i. IBM i has addressed the applicable CVE.

Vulnerability Details

CVEID: CVE-2018-11763 DESCRIPTION: Apache HTTP Server is vulnerable to a denial of service. By sending continuous overly large SETTINGS frames of maximum size to keep the ongoing HTTP/2 connection busy, a remote attacker could exploit this vulnerability to cause the service to fail to time out.
CVSS Base Score: 3.7
CVSS Temporal Score: See <https://exchange.xforce.ibmcloud.com/vulnerabilities/150420> for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L)

Affected Products and Versions

Release 7.3 of IBM i is affected.

Remediation/Fixes

The issue can be fixed by applying a PTF to IBM i.

Release 7.3 of IBM i is supported and will be fixed.

<https://www-945.ibm.com/support/fixcentral/>

The IBM i PTF numbers are:

**Release 7.3 –**SI68430

_Important note: _IBM recommends that all users running unsupported versions of affected products upgrade to supported and fixed version of affected products.