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Security Bulletin: Vulnerabilities in the Linux Kernel affect PowerKVM

Description

## Summary PowerKVM is affected by vulnerabilities in the Linux Kernel. IBM has now addressed these vulnerabilities. ## Vulnerability Details **CVEID:** [_CVE-2016-7042_](<http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-7042>)** DESCRIPTION:** Linux Kernel is vulnerable to a denial of service, caused by the use of an incorrect buffer size for certain timeout data by the proc_keys_show function in security/keys/proc.c. By reading the /proc/keys file, an attacker could exploit this vulnerability to cause the kernel to panic. CVSS Base Score: 6.2 CVSS Temporal Score: See [_https://exchange.xforce.ibmcloud.com/vulnerabilities/118133_](<https://exchange.xforce.ibmcloud.com/vulnerabilities/118133>) for the current score CVSS Environmental Score*: Undefined CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H) **CVEID:** [_CVE-2016-8633_](<http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-8633>)** DESCRIPTION:** Linux Kernel could allow a remote attacker to execute arbitrary code on the system, caused by an error in drivers/firewire/net.c. By sending specially-crafted fragmented packets. An attacker could exploit this vulnerability to execute arbitrary code on the system. CVSS Base Score: 7.3 CVSS Temporal Score: See [_https://exchange.xforce.ibmcloud.com/vulnerabilities/119632_](<https://exchange.xforce.ibmcloud.com/vulnerabilities/119632>) for the current score CVSS Environmental Score*: Undefined CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L) **CVEID:** [_CVE-2016-9191_](<http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-9191>)** DESCRIPTION:** Linux Kernel is vulnerable to a denial of service, caused by the improper handling of specific drop operations by the cgroup offline implementation. A local attacker could exploit this vulnerability using a specially crafted application to cause the system to hang. CVSS Base Score: 6.2 CVSS Temporal Score: See [_https://exchange.xforce.ibmcloud.com/vulnerabilities/119404_](<https://exchange.xforce.ibmcloud.com/vulnerabilities/119404>) for the current score CVSS Environmental Score*: Undefined CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H) **CVEID:** [_CVE-2016-8399_](<http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-8399>)** DESCRIPTION:** Google Android could allow a local attacker to gain elevated privileges on the system, caused by a flaw in the kernel networking subsystem. By persuading a victim to install a specially-crafted application, an attacker could exploit this vulnerability to execute arbitrary code within the context of a privileged process. CVSS Base Score: 7.8 CVSS Temporal Score: See [_https://exchange.xforce.ibmcloud.com/vulnerabilities/121227_](<https://exchange.xforce.ibmcloud.com/vulnerabilities/121227>) for the current score CVSS Environmental Score*: Undefined CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H) **CVEID:** [_CVE-2016-8650_](<http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-8650>)** DESCRIPTION:** Linux Kernel is vulnerable to a denial of service, caused by the failure to ensure that memory is allocated for limb data by mpi_powm function. A local attacker could exploit this vulnerability using an add_key system call for an RSA key with a zero exponent to cause the system to panic. CVSS Base Score: 6.2 CVSS Temporal Score: See [_https://exchange.xforce.ibmcloud.com/vulnerabilities/119408_](<https://exchange.xforce.ibmcloud.com/vulnerabilities/119408>) for the current score CVSS Environmental Score*: Undefined CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H) ## Affected Products and Versions PowerKVM 2.1 and PowerKVM 3.1. Note that PowerKVM is not affeced by CVE-2016-9191. ## Remediation/Fixes Customers can update PowerKVM systems by using "yum update". Fix images are made available via Fix Central. For version 3.1, see [_https://ibm.biz/BdHggw_](<https://ibm.biz/BdHggw>). This issue is addressed as of 3.1.0.2 update 5 or later. For version 2.1, see [_https://ibm.biz/BdEnT8_](<https://ibm.biz/BdEnT8>). This issue is addressed as of PowerKVM 2.1.1.3-65 update 15 or later. 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. ## Workarounds and Mitigations None ## Get Notified about Future Security Bulletins Subscribe to [My Notifications](< http://www-01.ibm.com/software/support/einfo.html>) to be notified of important product support alerts like this. ### References [Complete CVSS v2 Guide](<http://www.first.org/cvss/v2/guide> "Link resides outside of ibm.com" ) [On-line Calculator v2](<http://nvd.nist.gov/CVSS-v2-Calculator> "Link resides outside of ibm.com" ) [Complete CVSS v3 Guide](<http://www.first.org/cvss/user-guide> "Link resides outside of ibm.com" ) [On-line Calculator v3](<http://www.first.org/cvss/calculator/3.0> "Link resides outside of ibm.com" ) Off ## Related Information [IBM Secure Engineering Web Portal](<http://www.ibm.com/security/secure-engineering/bulletins.html>) [IBM Product Security Incident Response Blog](<http://www.ibm.com/blogs/psirt>) ## Change History 24 Jan 2017 - 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 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. In addition to other efforts to address potential vulnerabilities, IBM periodically updates the record of components contained in our product offerings. As part of that effort, if IBM identifies previously unidentified packages in a product/service inventory, we address relevant vulnerabilities regardless of CVE date. Inclusion of an older CVEID does not demonstrate that the referenced product has been used by IBM since that date, nor that IBM was aware of a vulnerability as of that date. We are making clients aware of relevant vulnerabilities as we become aware of them. "Affected Products and Versions" referenced in IBM Security Bulletins are intended to be only products and versions that are supported by IBM and have not passed their end-of-support or warranty date. Thus, failure to reference unsupported or extended-support products and versions in this Security Bulletin does not constitute a determination by IBM that they are unaffected by the vulnerability. Reference to one or more unsupported versions in this Security Bulletin shall not create an obligation for IBM to provide fixes for any unsupported or extended-support products or versions. [{"Product":{"code":"SSZJY4","label":"PowerKVM"},"Business Unit":{"code":"BU054","label":"Systems w\/TPS"},"Component":"Not Applicable","Platform":[{"code":"PF016","label":"Linux"}],"Version":"2.1;3.1","Edition":"KVM","Line of Business":{"code":"LOB08","label":"Cognitive Systems"}}]


Affected Software


CPE Name Name Version
PowerKVM 2.1
PowerKVM 3.1

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