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AUSCERT External Security Bulletin Redistribution
ESB-2019.2918
Multiple Vulnerabilities in the Linux kernel affect the IBM
FlashSystem models V840 and V9000
5 August 2019
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AusCERT Security Bulletin Summary
---------------------------------
Product: IBM FlashSystem V840
Publisher: IBM
Operating System: Network Appliance
Impact/Access: Denial of Service -- Remote/Unauthenticated
Access Confidential Data -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2017-18017 CVE-2017-17449
Reference: ESB-2019.1089
ESB-2019.0570
ESB-2018.3848
ESB-2018.1971
Original Bulletin:
http://www.ibm.com/support/docview.wss?uid=ibm10957179
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Multiple Vulnerabilities in the Linux kernel affect the IBM FlashSystem models
V840 and V9000
Product: IBM FlashSystem V840
Operating system(s): Platform Independent
Reference #: 0957179
Security Bulletin
Summary
There are vulnerabilities in Java to which the IBM FlashSystem V840 and
FlashSystem V9000 are susceptible (CVE-2017-18017 and CVE-2017-17449). An
exploit of CVE-2017-18017 could allow a remote attacker to cause a denial of
service condition. An exploit of CVE-2017-17449 could allow an attacker to
obtain sensitive information.
Vulnerability Details
CVEID: CVE-2017-18017
DESCRIPTION: Linux Kernel is vulnerable to a denial of service, caused by a
use-after-free flaw in the tcpmss_mangle_packet function in net/netfilter/
xt_TCPMSS.c. By leveraging the presence of xt_TCPMSS in an iptables action, a
remote attacker could exploit this vulnerability to cause a denial of service
condition.
CVSS Base Score: 7.5
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/
137122 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-2017-17449
DESCRIPTION: Linux Kernel could allow a local attacker to obtain sensitive
information, caused by the failure to restrict observations of Netlink messages
to a single net namespace when CONFIG_NLMON is enabled in the
__netlink_deliver_tap_skb function in net/netlink/af_netlink.c. By leveraging
the CAP_NET_ADMIN capability to sniff an nlmon interface for all Netlink
activity on the system, an attacker could exploit this vulnerability to obtain
sensitive information.
CVSS Base Score: 6.2
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/
136106 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N)
Affected Products and Versions
Storage Node machine type and models (MTMs) affected:
o 9846-AE1 and 9848-AE1
o 9846-AE2 and 9848-AE2
o 9846-AE3 and 9848-AE3
Controller Node MTMs affected:
o 9846-AC0 and9848-AC0
o 9846-AC1 and 9848-AC1
o 9846-AC2 and 9848-AC2
o 9846-AC3 and 9848-AC3
Supported storage node code versions which are affected
o VRMFs prior to 1.4.8.2
o VRMFs prior to 1.5.2.5
o VRMFs prior to 1.6.1.0
Supported controller node code versions which are affected
. VRMFs prior to 7.8.1.8
. VRMFs prior to 8.1.3.3
. VRMFs prior to 8.2.0.0
Remediation/Fixes
+--------------------+------------------------------------+--------+-------------------------+
| | | | |
| MTMs | VRMF | APAR | Remediation/First Fix |
| | | | |
+--------------------+------------------------------------+--------+-------------------------+
| | | | |
| Storage nodes: | | | |
| 9846-AE1,9848-AE1, | Code fixes are now available, the | | |
| 9846-AE2, | minimum VRMF containing the fix | | |
| 9848-AE2, | depends on the code stream: | | |
| 9846-AE3, & | | | |
| 9848-AE3 | Fixed Code VRMF | | FlashSystem V840 fixes |
| | 1.6 stream: 1.6.1.0 | | or FlashSystem V9000 |
| Controller nodes: | 1.5 stream: 1.5.2.5 | N/A | fixes for storage and |
| 9846-AC0, | 1.4 stream: 1.4.8.2 | | controller node are |
| 9846-AC1, | | | available @ IBM's Fix |
| 9848-AC0, | Controller Node VRMF | | Central |
| 9848-AC1, | 8.2 stream: 8.2.0.0 | | |
| 9846-AC2, | 8.1 stream: 8.1.3.3 | | |
| 9848-AC2, | 7.8 stream: 7.8.1.8 | | |
| 9846-AC3, & | | | |
| 9848-AC3 | | | |
| | | | |
+--------------------+------------------------------------+--------+-------------------------+
Workarounds and Mitigations
Upgrade to a remediated code level.
Acknowledgement
None.
Change History
28 June 2019 Original Version Published
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