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2012-08 Security Advisory: NSM Products:Linux Kernel TCP Sequence Number Generation Issue

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Article ID: JSA10530 SECURITY_ADVISORIES Last Updated: 09 May 2013Version: 1.0
Legacy Advisory Id:
PSN-2012-08-688
Product Affected:
This issue affects all NSM products, regardless of platform.
Problem:

A vulnerability in the way that TCP sequence numbers and fragment identification values are generated has been identified in Juniper Networks NSM products (NSMXpress, NSMXpress II, NSM3000, and NSMserver).

CVE-2011-3188 7.8 (AV:N/AC:L/Au:N/C:N/I:N/A:C)

This issue is assumed to be known publicly.

The Juniper SIRT is not aware of any specific malicious exploitation of this vulnerability against Juniper Networks NSM products.

No other Juniper Networks products or platforms are affected by the issue in this bulletin.
Solution:

The issue in this bulletin was resolved by specific fixes to the NSM product.

NSM version 2011.4s3 (released July 27, 2012), version 2012.1 (released July 03, 2012), and all subsequent releases contain the fixes for this issue.

KB16765 - "In which releases are vulnerabilities fixed?" describes which releases are fixed for vulnerabilities per Juniper Networks' "End of Engineering" and "End of Life" support policies.

Workaround:

It is always prudent to limit physical and network-based access to the NSM device.

Customers are strongly encouraged to upgrade to a release listed above.
Implementation:

How to obtain fixed software:

NSM Maintenance Releases are available at http://support.juniper.net from the "Download Software" links. If a Maintenance Release is not adequate and access to NSM patches is needed, open a customer support case. A JTAC engineer will review your request and respond, ensuring that you will be provided with the most appropriate Patch Release for your specific situation.
CVSS Score:
7.8 (AV:N/AC:L/Au:N/C:N/I:N/A:C)
Severity Level:
High
Severity Assessment:
Information for how Juniper Networks uses CVSS can be found at KB 16446 "Common Vulnerability Scoring System (CVSS) and Juniper's Security Advisories."

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