Security Bulletin
Summary
PowerKVM is affected by vulnerabilities in Mozilla Firefox libgraphite (graphite2). These vulnerabilities are now fixed.
Vulnerability Details
CVEID: CVE-2016-1521
DESCRIPTION: Libgraphite, as used in Mozilla Firefox, could allow a remote attacker to execute arbitrary code on the system, caused by an error in the directrun function when handling malicious fonts. An attacker could exploit this vulnerability using a specially crafted Graphite smart font to execute arbitrary code on the system, obtain sensitive information, or cause the application to crash.
CVSS Base Score: 8.8
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/110666 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H)
CVEID: CVE-2016-1522
DESCRIPTION: Libgraphite, as used in Mozilla Firefox, is vulnerable to a heap-based buffer overflow, caused by improper bounds checking by the bidirectional font handling functionality. By using a specially crafted Graphite smart font, a remote attacker could overflow a buffer and execute arbitrary code on the system or trigger a NULL pointer dereference and cause the application to crash.
CVSS Base Score: 8.8
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/110667 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H)
CVEID: CVE-2016-1523
DESCRIPTION: Mozilla Firefox could allow a remote attacker to execute arbitrary code on the system, caused by the improper validation of internal instruction parameters in the Graphite 2 library using special CNTXT_ITEM instructions. By persuading a victim to visit a specially crafted Web site, an attacker could exploit this vulnerability to execute arbitrary code on the system.
CVSS Base Score: 8.8
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/110569 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H)
CVEID: CVE-2016-1526
DESCRIPTION: Libgraphite, as used in Mozilla Firefox, is vulnerable to a denial of service, caused by the improper validation of a size value by the TtfUtil:LocaLookup function in TtfUtil.cpp. An attacker could exploit this vulnerability using a specially crafted Graphite smart font to obtain sensitive information or cause the application to crash.
CVSS Base Score: 8.1
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/110769 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H)
Affected Products and Versions
PowerKVM 2.1 and PowerKVM 3.1
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 for 3.1.0.1 update 2 or later.
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
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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Document Information
Modified date:
17 June 2018
UID
isg3T1023776