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Security Bulletin: Vulnerabilities CVE-2019-0196, CVE-2019-0197, and CVE-2019-0220 in the IBM i HTTP Server affect IBM i.

Security Bulletin


Summary

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

This security bulletin has been updated, on June 21, 2019, as additional IBM i PTFs are available for IBM i 7.4.

Vulnerability Details

CVEID: CVE-2019-0220
DESCRIPTION: Apache HTTP Server could provide weaker than expected security, caused by URL normalization inconsistencies. A remote attacker could exploit this vulnerability to launch further attacks on the system.
CVSS Base Score: 5.3
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/158948 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N)

CVEID: CVE-2019-0196
DESCRIPTION: Apache HTTP Server is vulnerable to a denial of service, caused by a use-after-free on a string compare in the mod_http2 module. By sending a specially-crafted request, a remote attacker could exploit this vulnerability to cause a denial of service condition.
CVSS Base Score: 5.3
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/158963 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L)

CVEID: CVE-2019-0197
DESCRIPTION: Apache HTTP Server is vulnerable to a denial of service, caused by a flaw when HTTP/2 or H2Upgrade was enabled for http/https host in the mod_http2 module. By sending a specially-crafted request, a remote attacker could exploit this vulnerability to cause a denial of service condition.
CVSS Base Score: 5.3
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/158964 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L)


Affected Products and Versions

Releases 7.2, 7.3, and 7.4 of IBM i are affected.

Remediation/Fixes

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

Releases 7.2, 7.3 and 7.4 of IBM i are supported and will be fixed.

The IBM i PTF numbers are:
Release 7.2 - SI69901
Release 7.3 - SI69900 and SI69828
Release 7.4 - SI69187 and SI69189

 

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

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


Workarounds and Mitigations

None

Get Notified about Future Security Bulletins

Reference

Complete CVSS v3 Guide
On-line Calculator v3

Related Information

IBM Secure Engineering Web Portal
IBM Product Security Incident Response Blog

Change History

24 May 2019: Original Version Published
21 June 2019: Updated to include IBM i 7.4 release information

*The CVSS Environment Score is customer environment specific and will ultimately impact the Overall CVSS Score. Customers can evaluate the impact of this vulnerability in their environments by accessing the links in the Reference section of this Security Bulletin.

Disclaimer

According to the Forum of Incident Response and Security Teams (FIRST), the Common Vulnerability Scoring System (CVSS) is an "industry open standard designed to convey vulnerability severity and help to determine urgency and priority of response." IBM PROVIDES THE CVSS SCORES ""AS IS"" WITHOUT WARRANTY OF ANY KIND, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. CUSTOMERS ARE RESPONSIBLE FOR ASSESSING THE IMPACT OF ANY ACTUAL OR POTENTIAL SECURITY VULNERABILITY.


Cross reference information
Product Component Platform Version Edition
IBM i IBM i 7.2,7.3,7.4
IBM i 7.3 IBM i 7.3
IBM i 7.4 IBM i 7.4

Document information

More support for: IBM i 7.2

Software version: 7.2

Operating system(s): IBM i

Reference #: 0883380

Modified date: 21 June 2019