Security Bulletin: Vulnerabilities in Mozilla NSS affect the IBM FlashSystem models 840 and 900

Summary

There are vulnerabilities in Mozilla Network Security Services (NSS) to which the IBM® FlashSystem™ 840 and FlashSystem™ 900 are susceptible. An exploit of these vulnerabilities (CVE-2016-2834, CVE-2016-5285, and CVE-2016-8635) could allow a remote attacker to execute arbitrary code, to recover private keys, to crash a TLS/SSL server, or to cause a denial of service.

Vulnerability Details

CVEID: CVE-2016-2834 DESCRIPTION: Mozilla Network Security Services (NSS), as used in Mozilla Firefox, could allow a remote attacker to execute arbitrary code on the system, caused by memory safety bugs within the browser engine. By persuading a victim to visit a specially-crafted Web site, a remote attacker could exploit this vulnerability using unknown attack vectors to execute arbitrary code on the vulnerable system or cause a denial of service.
CVSS Base Score: 8.8
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/113870 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H)

CVEID: CVE-2016-5285 DESCRIPTION: Mozilla Network Security Services (NSS), as used in Mozilla Firefox, is vulnerable to a denial of service, caused by a NULL pointer dereference in PK11_SignWithSymKey / ssl3_ComputeRecordMACConstantTime when handling invalid Diffie-Hellman keys. A remote attacker could exploit this vulnerability to crash a TLS/SSL server.
CVSS Base Score: 5.3
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/119189 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:L)

CVEID: CVE-2016-8635 DESCRIPTION: Mozilla Network Security Services (NSS), as used in Mozilla Firefox, could allow a remote attacker to obtain sensitive information, caused by a small subgroup confinement attack in Diffie Hellman Client key exchange handling. By confining the client DH key to small subgroup of the desired group, a remote attacker could exploit this vulnerability to recover private keys.
CVSS Base Score: 5.3
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/119190 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N)

Affected Products and Versions

FlashSystem 840 machine type and models (MTMs) affected include 9840-AE1 and 9843-AE1.

FlashSystem 900 MTMs affected include 9840-AE2 and 9843-AE2.

Code versions affected include supported VRMFs:
· 1.4.0.0 – 1.4.5.1
· 1.3.0.0 – 1.3.0.6

Remediation/Fixes

MTMs

| VRMF| APAR| Remediation/First Fix
—|—|—|—
FlashSystem****840 MTM:
9840-AE1 &
9843-AE1

FlashSystem 900 MTMs:
9840-AE2 &
9843-AE2| _Code fixes are now available, the minimum VRMF containing the fix depends on the code stream:

___ Fixed code VRMF .__
_1.4 stream: 1.4.6.0 _
1.3 stream: 1.3.0.7| _ N/A| FlashSystem 840 fixes****and FlashSystem 900 fixes****are available @ IBM’s Fix Central _

Workarounds and Mitigations

None