Security Bulletin
Summary
PowerKVM is affected by a vulnerability in sudo. IBM has now addressed this vulnerability, which is described by two CVEs.
Vulnerability Details
CVEID: CVE-2017-1000367
DESCRIPTION: sudo could allow a local attacker to gain elevated privileges, caused by improper parsing in the get_process_ttyname() function for Linux. An attacker with privileges to execute commands could exploit this vulnerability to overwrite any file on the filesystem with his command's output and gain root privileges on the system.
CVSS Base Score: 7.8
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/126527 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
CVEID: CVE-2017-1000368
DESCRIPTION: sudo could allow a local attacker to gain elevated privileges, caused by improper parsing in the get_process_ttyname() function for Linux. An attacker with privileges to execute commands could exploit this vulnerability to overwrite any file on the filesystem with his command's output and gain root privileges on the system.
CVSS Base Score: 7.8
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/127578 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
Affected Products and Versions
PowerKVM 2.1 and 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. This issue is addressed starting with v3.1.0.2 update 8.
For version 2.1, see https://ibm.biz/BdEnT8. This issue is addressed starting with PowerKVM 2.1.1.3-65 update 17. 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
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References
Change History
24 June 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
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
isg3T1025360