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Security Bulletin: Vulnerabilities in the Apache HTTP Server affect PowerKVM (CVE-2015-3183,CVE-2015-3185)

Security Bulletin


PowerKVM is affected by vulnerabilities in the Apache HTTP Server (httpd). These vulnerabilities are now fixed.

Vulnerability Details

CVEID: CVE-2015-3183
Apache HTTP Server is vulnerable to HTTP request smuggling, caused by a chunk header parsing flaw in the apr_brigade_flatten() function. By sending a specially-crafted request in a malformed chunked header to the Apache HTTP server, an attacker could exploit this vulnerability to poison the web cache, bypass web application firewall protection, and conduct XSS attacks.
CVSS Base Score: 6.1
CVSS Temporal Score: See for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N)

CVEID: CVE-2015-3185
An unspecified error in Apache HTTP Server within the ap_some_auth_required() function has an unknown impact and attack vector.
CVSS Base Score: 3.7
CVSS Temporal Score: See 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:L/A:N)

Affected Products and Versions

PowerKVM 2.1


Customers can update PowerKVM systems by using "yum update".

This vulnerability does not exist in PowerKVM 3.1.

For version 2.1, see PowerKVM Update 9 at and all later 2.1.1 service updates. Customers running v2.1 are, in any case, encouraged to upgrade to v3.1.

For v2.1 systems currently running fix levels of PowerKVM prior to 2.1.1, please see for prerequisite fixes and instructions.

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Change History

9 May 2016 - Initial Version

*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.


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.

[{"Product":{"code":"SSZJY4","label":"PowerKVM"},"Business Unit":{"code":"","label":"TSS"},"Component":"Not Applicable","Platform":[{"code":"PF016","label":"Linux"}],"Version":"2.1","Edition":"KVM"}]

Document Information

Modified date:
17 June 2018