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AUSCERT External Security Bulletin Redistribution
ESB-2019.3739
Linux Kernel as used by IBM QRadar SIEM is vulnerable to Denial of
Service(CVE-2019-11477, CVE-2019-11478, CVE-2019-11479)
7 October 2019
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AusCERT Security Bulletin Summary
---------------------------------
Product: IBM QRadar SIEM
Publisher: IBM
Operating System: Linux variants
Impact/Access: Denial of Service -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2019-11479 CVE-2019-11478 CVE-2019-11477
Reference: ASB-2019.0178.2
ASB-2019.0174
ASB-2019.0172
ESB-2019.2150
ESB-2019.2149.2
ESB-2019.2132.3
Original Bulletin:
https://www.ibm.com/support/pages/node/1076811
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Linux Kernel as used by IBM QRadar SIEM is vulnerable to Denial of
Service(CVE-2019-11477, CVE-2019-11478, CVE-2019-11479)
Security Bulletin
Document Information
More support for:
IBM QRadar SIEM
Software version:
7.3, 7.2
Operating system(s):
Linux
Software edition:
All Editions
Reference #:
1076811
Modified date:
03 October 2019
Summary
Linux Kernel as used by IBM QRadar SIEM is vulnerable to Denial of Service
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 Environmental Score: *Undefined
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 Environmental Score: *Undefined
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 Environmental Score: *Undefined
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
. QRadar / QRM / QVM / QRIF / QNI 7.2 to 7.2.8 Patch 16
. QRadar / QRM / QVM / QRIF / QNI 7.3 to 7.3.2 Patch 3
Remediation/Fixes
. QRadar / QRM / QVM / QRIF / QNI 7.2.8 Patch 17
. QRadar / QRM / QVM / QRIF / QNI 7.3.2 Patch 4
Workarounds and Mitigations
None
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