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

Security Bulletin

Summary

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

Vulnerability Details

CVEID: CVE-2015-3183
DESCRIPTION: 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 https://exchange.xforce.ibmcloud.com/vulnerabilities/104844 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
DESCRIPTION: 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 https://exchange.xforce.ibmcloud.com/vulnerabilities/104845 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

Remediation/Fixes

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

This vulnerability does not exist in PowerKVM 3.1.

For version 2.1, see PowerKVM 2.1.1.3-65. Update 9 at https://ibm.biz/BdEnT8 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 http://download4.boulder.ibm.com/sar/CMA/OSA/05e4c/0/README for prerequisite fixes and instructions.

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References

Complete CVSS v2 Guide
On-line Calculator v2

Complete CVSS v3 Guide
On-line Calculator v3

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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.

Disclaimer

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

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Tips

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