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2012-10 Security Bulletin: Junos: RPD crash while performing PIM stress testing

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Article ID: JSA10537 SECURITY_ADVISORIES Last Updated: 09 May 2013Version: 3.0
Legacy Advisory Id:
PSN-2012-10-732
Product Affected:
This issue can affect all Junos routers running Junos OS 11.1R1 or later, configured to utilize the PIM protocol.
Problem:

During extended stress testing of the PIM protocol, a malformed PIM Hello message triggered an RPD crash. While the crash was caused by a malformed PIM message, simply replaying the crafted packet alone does not lead to the crash. This issue affects both IPv4 PIM and IPv6 PIM.

Juniper SIRT is not aware of any malicious exploitation of this vulnerability.

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

All Junos OS software releases built on or after 2012-10-05 have fixed this specific issue. Releases containing the fix specifically include: 11.4R5, 12.1R3-S2, 12.2R1-S1, and all subsequent releases (i.e. all releases built after 12.2R1-S1).

Customers can confirm the build date of any Junos OS release by issuing the command 'show version detail'.

This issue is being tracked as PR 792334 and is visible on the Customer Support website.

KB16765 - "In which releases are vulnerabilities fixed?" describes which release vulnerabilities are fixed as per our End of Engineering and End of Life support policies.

Workaround:

Use access lists or firewall filters to limit access to the router via PIM only from trusted hosts.
Implementation:

How to obtain fixed software:

Security vulnerabilities in Junos are fixed in the next available Maintenance Release of each supported Junos version. In some cases, a Maintenance Release is not planned to be available in an appropriate time-frame. For these cases, Service Releases are made available in order to be more timely. Security Advisory and Security Notices will indicate which Maintenance and Service Releases contain fixes for the issues described. Upon request to JTAC, customers will be provided download instructions for a Service Release. Although Juniper does not provide formal Release Note documentation for a Service Release, a list of "PRs fixed" can be provided on request.


2012-10-10 UPDATE: While fixes were checked into all non-EOE releases, the root cause of this issue only exists in Junos OS 11.1 and later.
CVSS Score:
7.1 (AV:N/AC:M/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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