Security Bulletin
Summary
IBM Event Streams has addressed the following vulnerabilities in the kubectl versions shipped.
Vulnerability Details
CVEID: CVE-2019-1002101
DESCRIPTION: Kubernetes could allow a remote attacker to traverse directories on the system, caused by the improper handling of symlinks. By persuading a victim to use the kubectl cp command or the oc cp command with a malicious container, an attacker could replace or delete arbitrary files on the host machine.
CVSS Base Score: 6.5
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/158804 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N)
DESCRIPTION: Kubernetes could allow a remote attacker to traverse directories on the system, caused by the improper handling of symlinks. By persuading a victim to use the kubectl cp command or the oc cp command with a malicious container, an attacker could replace or delete arbitrary files on the host machine.
CVSS Base Score: 6.5
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/158804 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N)
CVEID: CVE-2019-11244
DESCRIPTION: Kubernetes could allow a remote attacker to bypass security restrictions, caused by an improper directory permission issue with the --cache-dir option. By sending a specially-crafted request, an attacker could exploit this vulnerability to modify the written files and disrupt the kubectl invocation.
CVSS Base Score: 7.5
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/160042 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:H/A:N)
DESCRIPTION: Kubernetes could allow a remote attacker to bypass security restrictions, caused by an improper directory permission issue with the --cache-dir option. By sending a specially-crafted request, an attacker could exploit this vulnerability to modify the written files and disrupt the kubectl invocation.
CVSS Base Score: 7.5
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/160042 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:H/A:N)
Affected Products and Versions
IBM Event Streams 2018.3.0
IBM Event Streams 2018.3.1
IBM Event Streams 2019.1.1
Remediation/Fixes
Upgrade to IBM Event Streams 2019.2.1 which is available from Passport Advantage.
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References
Off
Change History
Initial version June 2019
*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.
Document Location
Worldwide
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Document Information
Modified date:
12 July 2019
UID
ibm10888071