5 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:N/AC:L/Au:N/C:P/I:N/A:N
The RC4 “Bar Mitzvah” Attack for SSL/TLS affects System x IMM.
The RC4 “Bar Mitzvah” Attack for SSL/TLS affects System x IMM.
Vulnerability Details
CVE-ID: CVE-2015-2808
Description: The RC4 algorithm, as used in the TLS protocol and SSL protocol, could allow a remote attacker to obtain sensitive information. An attacker could exploit this vulnerability to remotely expose account credentials without requiring an active man-in-the-middle session. Successful exploitation could allow an attacker to retrieve credit card data or other sensitive information. This vulnerability is commonly referred to as “Bar Mitzvah Attack”.
CVSS Base Score: 5
CVSS Temporal Score: See <http://exchange.xforce.ibmcloud.com/#/vulnerabilities/101851> for current score
CVSS Environmental Score*: Undefined
CVSS Vector: (AV:N/AC:L/Au:N/C:P/I:N/A:N)
The following IMM code levels may exhibit this issue:
The following platforms may be affected:
It is recommended to update IMM to version 1.48 YUOOG8C or later. Firmware updates are available through IBM Fix Central: <http://www.ibm.com/support/fixcentral/>.
In addition to updating to the recommended firmware version, the following configuration change is required using one of the two options described below:
> Through the IMM Web interface, on the IMM Security page, select “High Security Mode” in the “Cryptography Management” section.
>
> -OR-
>
> Use the following ASU command: asu set imm.ssl_cipher “high security mode”
After the configuration change, restart the IMM for the configuration to take effect.
You should verify applying this fix does not cause any compatibility issues. The fix disables RC4 stream cipher by default. If you change the default setting after applying the fix, you will expose yourself to the attack described above. IBM recommends that you review your entire environment to identify other areas where you have enabled the RC4 stream cipher and take appropriate mitigation and remediation actions.
None.