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2018-10 Security Bulletin: Junos OS: Receipt of a malformed MPLS RSVP packet leads to a Routing Protocols Daemon (RPD) crash (CVE-2018-0050)

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Article ID: JSA10884 SECURITY_ADVISORIES Last Updated: 10 Oct 2018Version: 4.0
Product Affected:
This issue affects Junos OS 14.1, 14.1X53, 14.2.
Problem:

An error handling vulnerability in Routing Protocols Daemon (RPD) of Juniper Networks Junos OS allows an attacker to cause RPD to crash. Continued receipt of this malformed MPLS RSVP packet will cause a sustained Denial of Service condition.

Affected releases are Juniper Networks Junos OS:

  • 14.1 versions prior to 14.1R8-S5, 14.1R9;
  • 14.1X53 versions prior to 14.1X53-D48 on QFX Switching;
  • 14.2 versions prior to 14.1X53-D130 on QFabric System;
  • 14.2 versions prior to 14.2R4.


This issue does not affect versions of Junos OS before 14.1R1.

Junos OS RSVP only supports IPv4. IPv6 is not affected by this issue.

This issue require it to be received on an interface configured to receive this type of traffic.

The following minimal protocols configurations are required:

[protocols rsvp]
[protocols mpls interface]

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

This issue was found during internal product security testing or research.

This issue has been assigned CVE-2018-0050.
 

Solution:

The following software releases have been updated to resolve this specific issue: 14.1R8-S5, 14.1R9, 14.1X53-D130, 14.1X53-D48, 14.2R4, 15.1R1, and all subsequent releases.

This issue is being tracked as PR 1087100 which is visible on the Customer Support website.

Note: Juniper SIRT's policy is not to evaluate releases which are beyond End of Engineering (EOE) or End of Life (EOL).
 

Workaround:

Remove MPLS configuration stanzas from interface configurations that are at risk.

No other workarounds exist for this issue. 
 

Implementation:
Software Releases, patches and updates are available at https://www.juniper.net/support/downloads/.
 
Modification History:
‚Äč2018-10-10: Initial publication

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 KB 16446 "Common Vulnerability Scoring System (CVSS) and Juniper's Security Advisories."

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