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

published 2019-01-15 7 y ago modified 2026-06-17 4 mo ago also EUVD-2019-0813

cvss: 9.8; version 3.0, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 5.3%; EPSS 5.3% chance of exploitation in 30 days, percentile 92%
public exploits: 0; none known

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.

Patch / fix

fixed in 1

Juniper Networks Junos OS 14.1X53-D47, 15.1R7-S3, 15.1X53-D50

Exploit prediction

5.26% chance of exploitation in the next 30 days, higher than 92% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.0	9.8	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD	3.1	9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD	2.0	7.5	AV:N/AC:L/Au:N/C:P/I:P/A:P

Affected products

Juniper Networks Junos OS

Classification

Weakness

CWE-908 Use of Uninitialized Resource

References

kb.juniper.net /JSA10906
vendor-advisory
securityfocus.com /bid/106666
vdb-entry, third-party-advisory

Sources

CVE List CVE-2019-0006
NVD CVE-2019-0006

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Summary