Security Bulletin
Summary
PowerKVM is affected by vulnerabilities in Artifex Ghostscript. IBM has now addressed these vulnerabilities.
Vulnerability Details
CVEID: CVE-2018-16542
DESCRIPTION: Artifex Ghostscript is vulnerable to a denial of service, caused by an improper interpreter stack-size checking. By persuading a victim to open a specially-crafted file, a remote attacker could exploit this vulnerability to crash the interpreter.
CVSS Base Score: 5.5
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/149468 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H)
CVEID: CVE-2018-16509
DESCRIPTION: Artifex Ghostscript could allow a remote attacker to execute arbitrary code on the system, caused by improper privilege checking in the handling of /invalidaccess exceptions. By persuading a victim to open a specially-crafted file, an attacker could exploit this vulnerability to execute arbitrary code on the system.
CVSS Base Score: 7.8
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/149460 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-2018-15910
DESCRIPTION: Artifex Ghostscript could allow a remote attacker to execute arbitrary code on the system, caused by a type confusion in the LockDistillerParams parameter. An attacker could exploit this vulnerability to crash the interpreter or possibly execute arbitrary code on the system.
CVSS Base Score: 7.3
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/148958 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-2018-10194
DESCRIPTION: Artifex Ghostscript is vulnerable to a stack-based buffer overflow, caused by improper bounds checking by the set_text_distance function in devices/vector/gdevpdts.c in the pdfwrite component. By persuading a victim to open a specially-crafted file, a remote attacker could overflow a buffer and execute arbitrary code or cause a denial of service condition on the system.
CVSS Base Score: 7.8
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/142088 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)
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 16.
Workarounds and Mitigations
none
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References
Change History
28 September 2018 - 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 December 2018
UID
ibm10737573