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 August 8, 2019, as superseding IBM i PTFs are available for CVE-2019-0220 for IBM i 7.2, 7.3, and 7.4.
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:

	CVE-2019-0196	CVE-2019-0197	CVE-2019-0220
IBM i 7.2	Not affected	Not affected	SI70724
IBM i 7.3	SI69828	SI69828	SI70629
IBM i 7.4	SI69189	SI69189	SI70725

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

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References

Complete CVSS v3 Guide
On-line Calculator v3

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Change History

24 May 2019: Original Version Published
21 June 2019: Updated to include IBM i 7.4 release information
8 August 2019: Updated to replace CVE-2019-0220 PTF numbers with superseding PTF numbers

*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

Review the IBM security bulletin disclaimer and definitions regarding your responsibilities for assessing potential impact of security vulnerabilities to your environment.

Document Location

Worldwide

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Tips

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