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AUSCERT External Security Bulletin Redistribution
ESB-2020.0736
Security Bulletin: IBM Integrated Management Module II (IMM2) is affected
by vulnerabilities in TCP (CVE-2019-11477, CVE-2019-11478, CVE-2019-11479)
28 February 2020
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AusCERT Security Bulletin Summary
---------------------------------
Product: IBM Integrated Management Module II
Publisher: IBM
Operating System: Network Appliance
Impact/Access: Denial of Service -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2019-11479 CVE-2019-11478 CVE-2019-11477
Reference: ESB-2020.0342
ESB-2019.3732
ESB-2019.3208
Original Bulletin:
https://www.ibm.com/support/pages/node/3609081
- --------------------------BEGIN INCLUDED TEXT--------------------
IBM Integrated Management Module II (IMM2) is affected by vulnerabilities in
TCP (CVE-2019-11477, CVE-2019-11478, CVE-2019-11479)
Security Bulletin
Summary
The following vulnerabilities in TCP have been addressed by IBM Integrated
Management Module II (IMM2).
Vulnerability Details
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-2019-11477
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-2019-11479
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 Integrated Management Module II (IMM2) for System x and Flex|1AOO |
+----------------------------------------------------------------+----------+
|IBM Integrated Management Module II (IMM2) for BladeCenter |1AOO |
+----------------------------------------------------------------+----------+
Remediation/Fixes
Firmware fix versions are available on Fix Central: http://www.ibm.com/support/
fixcentral/
+-------------------------------------------------------------+---------------+
|Affected Product(s) |Version(s) |
+-------------------------------------------------------------+---------------+
|IBM Integrated Management Module II (IMM2) for System x and | |
|Flex |1AOO90B-7.40 |
| | |
|(ibm_fw_imm2_1aoo90b-7.40_anyos_noarch) | |
+-------------------------------------------------------------+---------------+
|IBM Integrated Management Module II (IMM2) for BladeCenter | |
| |1AOO90B-7.40-bc|
|(ibm_fw_imm2_1aoo90b-7.40-bc_anyos_noarch) | |
+-------------------------------------------------------------+---------------+
Workarounds and Mitigations
None
Get Notified about Future Security Bulletins
References
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