Security Bulletin
Summary
PowerKVM is affected by vulnerabilities in glibc. IBM has now addressed these vulnerabilities.
Vulnerability Details
CVEID: CVE-2018-11237
DESCRIPTION: GNU glibc is vulnerable to a buffer overflow, caused by improper bounds of checking by the __mempcpy_avx512_no_vzeroupper function. By executing a specially-crafted program, a local attacker could overflow a buffer and execute arbitrary code on the system.
CVSS Base Score: 7.8
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/143580 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-2018-11236
DESCRIPTION: GNU glibc is vulnerable to a stack-based buffer overflow, caused by improper bounds of checking by the pathname arguments in the realpath function in stdlib/canonicalize.c. By using specially-crafted pathname arguments, a remote attacker could overflow a buffer and execute arbitrary code on the system.
CVSS Base Score: 7.3
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/143578 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-2018-6485
DESCRIPTION: GNU C Library is vulnerable to a denial of service, caused by an integer overflow in the implementation of the posix_memalign in memalign functions. A local attacker could exploit this vulnerability to cause the application to crash.
CVSS Base Score: 4
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/138627 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:L)
CVEID: CVE-2017-16997
DESCRIPTION: GNU C Library could allow a local attacker to gain elevated privileges on the system, caused by a flaw in the elf/dl-load.c. By using a Trojan horse library, an attacker could exploit this vulnerability to gain elevated privileges on the system.
CVSS Base Score: 8.4
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/136491 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
Affected Products and Versions
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. This issue is addressed starting with v3.1.0.2 update 17.
Workarounds and Mitigations
none
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References
Change History
7 February 2019 - 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:
04 March 2019
UID
ibm10870872