Security Bulletin: Potential DOS due to weak IPv4 and IPv6 sequence numbers in IBM Storwize V7000 Unified system (CVE-2011-3188)

Summary

Potential DOS (Denial of Service) attack due to weak IPv4 and IPv6 sequence numbers

Vulnerability Details

**CVE-ID:**CVE-2011-3188

**DESCRIPTION:The (1) IPv4 and (2) IPv6 implementations in the Linux kernel before 3.1 use a modified MD4 algorithm to generate sequence numbers and Fragment Identification values, which makes it easier for remote attackers to cause a denial of service (disrupted networking) or hijack network sessions by predicting these values and sending crafted packets. **

_CVE-2011-3188 _

CVSS Base Score: 5.8

CVSS Temporal Score: See http://xforce.iss.net/xforce/xfdb/69392 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (AV:N/AC:M/Au:N/C:P/I:P/A:P)

Affected Products and Versions

IBM Storwize V7000 Unified system
The product is affected when running code releases 1.3.0.0 to 1.4.0.X

Workarounds and Mitigations

Restrict access to the system’s IP interface, for example using a private network or firewall technology. Only users with access to the IP interface can exploit the vulnerability.

A fix for this issue is in version 1.4.1.0 of IBM Storwize V7000 Unified system. Customers running affected version of V7000 Unified, should upgrade to 1.4.1.0 or a later version, so that the fix gets applied.