Security Bulletin
Summary
IBM Cloud Pak System identified vulnerabilities in SAN VC supporting products. IBM announced a new release for IBM Cloud Pak System in response to vulnerabilities.
Vulnerability Details
CVEID: CVE-2019-11477
DESCRIPTION: Linux Kernel is vulnerable to a denial of service, caused by an integer overflow when processing TCP Selective Acknowledgement (SACK) capabilities. By sending specially-crafted SACKs requests, a remote attacker could exploit this vulnerability to cause a kernel panic condition.
CVSS Base score: 7.5
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/162662 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
CVEID: CVE-2019-11478
DESCRIPTION: Linux Kernel is vulnerable to a denial of service, caused by an issue with fragmenting the TCP retransmission queue when processing TCP Selective Acknowledgement (SACK) capabilities. By sending specially-crafted SACKs requests, a remote attacker could exploit this vulnerability to cause an excess of system resource usage.
CVSS Base score: 7.5
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/162664 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
CVEID: CVE-2019-11479
DESCRIPTION: Linux Kernel is vulnerable to a denial of service, caused by a flaw when processing minimum segment size (MSS). By sending specially-crafted MSS traffic, a remote attacker could exploit this vulnerability to cause excess usage of system resources.
CVSS Base score: 7.5
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/162665 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
Affected Products and Versions
| Affected Product(s) | Version(s) |
| IBM Cloud Pak System |
v2.3.0.1, v2.3.1.1, v2.3.2.0, v2.3.2.1, v2.3.3.0, v2.3.3.1, v2.3.3.2 |
Remediation/Fixes
Issues identified in supporting products for Cloud Pak System, for unsupported releases upgrade to supported product release.
Notice along with Cloud Pak System v2.3.3.2, v.2.3.2.1 BigFix has been removed.
For CLoud Pak System v.2.3.0.1, v2.3.1.0, v.2.3.1.1, v2.3.2.0, v2.3.3.0, v.2.3.3.1, v2.3.3.2, v.2.3.2.1
Upgrade to v2.3.3.3 with firmware update available in 4Q2020.
Information on upgrading can be found here: http://www.ibm.com/support/docview.wss?uid=ibm10887959.
Workarounds and Mitigations
None
Get Notified about Future Security Bulletins
References
Acknowledgement
Jonathan Looney (Netflix Information Security)
Change History
24 Oct 2020: Initial Publication
*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:
31 December 2020
UID
ibm16382224