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2015-10 Security Bulletin: Junos: Crafted packets cause mbuf chain corruption which may result in kernel panic (CVE-2014-6450)

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Article ID: JSA10699 SECURITY_ADVISORIES Last Updated: 17 Dec 2015Version: 2.0
Product Affected:
This issue can affect any product or platform running Junos OS with IPv6 enabled.​​​
Problem:
Specially crafted IPv6 packets ​can trigger mbuf chain corruption, which may eventually lead to a kernel panic in Junos OS. Devices not configured for IPv6 are unaffected by this vulnerability.

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

This issue is assigned CVE-2014-6450.
Solution:
The following software releases have been updated to resolve this specific issue: Junos OS 11.4R12-S4, 11.4R13, 12.1X44-D41, 12.1X46-D26, 12.1X47-D11/D15, 12.2R9, 12.2X50-D70, 12.3R8, 12.3X48-D10, 12.3X50-D42, 13.1R4-S3, 13.1R5, 13.1X49-D42, 13.1X50-D30, 13.2R6, 13.2X51-D26, 13.2X52-D15, 13.3R3-S3, 13.3R4, 14.1R3, 14.2R1, 15.1R1, 15.1X49-D10 and all subsequent releases.

This issue is being tracked as PR 1016371 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:
​No known workaround exists for this issue.

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.


Modification History:
Modification History:

2015-10-14: Initial publication
2015-12-17: While issue was initially found internally, a similar crash has been found in the field.

CVSS Score:
7.5 (CVSS:3.0:/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
Severity Level:
High
Severity Assessment:
Information for how Juniper Networks uses CVSS can be found at KB16446 "Common Vulnerability Scoring System (CVSS) and Juniper's Security Advisories"
Acknowledgements:

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