Security Bulletin: Vulnerability in GnuTLS affects Power Hardware Management Console ( CVE-2018-10845 CVE-2018-10844)

Summary

It was found that GnuTLS’s implementation of HMAC-SHA-384 and HMAC-SHA-256 was vulnerable to a Lucky Thirteen-style attack. A remote attacker could use this flaw to conduct distinguishing attacks and plain text recovery attacks via statistical analysis of timing data using crafted packets.

Vulnerability Details

CVEID: CVE-2018-10845
DESCRIPTION: GnuTLS could allow a remote attacker to obtain sensitive information, caused by a flaw in the implementation of HMAC-SHA-384 . By sending a specially-crafted packet, a remote attacker could exploit this vulnerability to obtain information.
CVSS Base Score: 5.9
CVSS Temporal Score: See <https://exchange.xforce.ibmcloud.com/vulnerabilities/148730&gt; for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N)

CVEID: CVE-2018-10844
DESCRIPTION: GnuTLS could allow a remote attacker to obtain sensitive information, caused by a flaw in the implementation of HMAC-SHA-256. By sending a specially-crafted packet, a remote attacker could exploit this vulnerability to obtain information.
CVSS Base Score: 5.9
CVSS Temporal Score: See <https://exchange.xforce.ibmcloud.com/vulnerabilities/148731&gt; for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N)

Affected Products and Versions

Power HMC V8.7.0.0
Power HMC V9.1.910.0

Remediation/Fixes

Remediation/Fixes

The following fixes are available on IBM Fix Central at: <http://www-933.ibm.com/support/fixcentral/&gt;

Product

|

VRMF

|

APAR

|

Remediation/Fix

—|—|—|—

Power HMC

|

V8.8.7.2 PTF3 ppc

|

MB04193

|

MH01807

Power HMC

|

V8.8.7.2 PTF3 x86

|

MB04192

|

MH01806

Power HMC

|

V9.1.921.0 PTF3 ppc

|

MB04195

|

MH01809

Power HMC

|

V9.1.920.0 PTF3 x86

|

MB04194

|

MH01808

Workarounds and Mitigations

None