Product Affected

This issue can affect any product or platform running Junos OS 13.2 or higher.
High
7.1 (AV:N/AC:M/Au:N/C:N/I:N/A:C)

Problem

Reception of a very high rate of crafted IGMP packets may cause the Junos kernel to crash. The contents of the valid IGMP packets must be specifically crafted to trigger the crash, while maintaining a transmit rate exceeding approximately 1000 packets per second. PIM must also be enabled to trigger this crash.

This issue only affects devices running Junos OS 13.2 or higher. Earlier versions of Junos are unaffected by this vulnerability.

This issue was found during internal product security testing.

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

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

This issue has been assigned CVE-2014-0614 .

Solution

The following software releases have been updated to resolve this specific issue:

  • All Junos OS software releases built on or after 2014-01-16, or
  • Junos OS 13.2R3, 13.3R1, and all subsequent releases (i.e. all releases built after 13.3R1).

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 944135 and is visible on the Customer Support website.


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

Workaround

Two options exist to mitigate this issue.

1) If PIM is not required, disabling PIM will avoid this crash.

2) While the IGMP flood is not limited to the management interface, if fxp0 is unused, explicitly disabling the external management interface will prevent the kernel panic.

[edit interfaces]
+   fxp0 {
+       disable;
+   }

In addition to (but not a substitute for) the recommendations listed above, it is good security practice to limit the exploitable attack surface of critical infrastructure networking equipment. Use access lists or firewall filters to limit access to the router only from trusted, administrative networks or hosts.

Severity Assessment

Information for how Juniper Networks uses CVSS can be found at KB 16446 [juniper.net] "Common Vulnerability Scoring System (CVSS) and Juniper's Security Advisories."

Related Information

Acknowledgements