Security Bulletin
Summary
PowerKVM is affected by vulnerabilities in libmspack. IBM has now addressed these vulnerabilities.
Vulnerability Details
CVEID: CVE-2018-14682
DESCRIPTION: libmspack is vulnerable to a denial of service, caused by an off-by-one in mspack/chmd.c in the TOLOWER() macro for CHM decompression. A remote attacker could exploit this vulnerability to cause a denial of service.
CVSS Base Score: 5.3
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/147666 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L)
CVEID: CVE-2018-14681
DESCRIPTION: libmspack could allow a remote attacker to overwrite arbitrary files, caused by an error in the kwajd_read_headers function in mspack/kwajd.c in libmspack. An attacker could exploit this vulnerability using bad KWAJ file header extensions to cause a one or two byte overwrite.
CVSS Base Score: 5.3
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/147669 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N)
CVEID: CVE-2018-14680
DESCRIPTION: An unspecified error in libmspack related to the failure to reject blank CHM filenames has an unknown impact and attack vector.
CVSS Base Score: 5.3
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/147668 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N)
CVEID: CVE-2018-14679
DESCRIPTION: libmspack is vulnerable to a denial of service, caused by an off-by-one error in the CHM PMGI/PMGL chunk number validity checks in mspack/chmd.c. A remote attacker could exploit this vulnerability to cause the application to crash.
CVSS Base Score: 5.3
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/147667 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L)
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
Get Notified about Future Security Bulletins
References
Change History
19 December 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:
04 March 2019
UID
ibm10792175