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2019-01 Security Bulletin: Junos OS: EX, QFX and MX series: Packet Forwarding Engine manager (FXPC) process crashes due to a crafted HTTP packet in a Virtual Chassis configuration (CVE-2019-0006)

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Product Affected:
This issue affects Junos OS 14.1X53, 15.1, 15.1X53. Affected platforms: EX Virtual Chassis Platforms, MX Virtual Chassis Platforms, QFX Virtual Chassis Platforms.

A certain crafted HTTP packet can trigger an uninitialized function pointer deference vulnerability in the Packet Forwarding Engine manager (fxpc) on all EX, QFX and MX Series devices in a Virtual Chassis configuration. This issue can result in a crash of the fxpc daemon or may potentially lead to remote code execution.

This issue only occurs when the crafted packet it destined to the device.

Affected releases are Juniper Networks Junos OS:

  • 14.1X53 versions prior to 14.1X53-D47 on EX and QFX Virtual Chassis Platforms;
  • 15.1 versions prior to 15.1R7-S3 all Virtual Chassis Platforms
  • 15.1X53 versions prior to 15.1X53-D50 on EX and QFX Virtual Chassis Platforms.

Juniper SIRT is not aware of any malicious exploitation of this vulnerability. This issue was seen in a production network where a routine security scan was performed on the device.

This issue was seen during production usage.

This issue has been assigned CVE-2019-0006.


The following Junos OS releases have been updated to resolve this specific issue: 14.1X53-D47, 15.1R7-S3, 16.1R1 and all subsequent releases.
This issue is being tracked as PR 1351411 and 1166070 which are 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).


There are no viable workarounds for this issue.

Software Releases, patches and updates are available at

Modification History:
  • 2019-01-09: Initial Publication.
  • 2019-01-10: minor update on the solution section.
  • 2019-01-22: minor update on the solution section.


Related Links:
CVSS Score:
9.8 (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
Risk Level:
Risk Assessment:
Information for how Juniper Networks uses CVSS can be found at KB 16446 "Common Vulnerability Scoring System (CVSS) and Juniper's Security Advisories."