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2019-04 Security Bulletin: Junos OS: SRX5000 series: Kernel crash (vmcore) upon receipt of a specific packet on fxp0 interface (CVE-2019-0044)

  [JSA10936] Show Article Properties

Product Affected:
This issue affects Junos OS 12.1X46, 12.3X48, 15.1X49. Affected platforms: SRX5000 series.

Receipt of a specific packet on the out-of-band management interface fxp0 may cause the system to crash and restart (vmcore).

By continuously sending a specially crafted packet to the fxp0 interface, an attacker can repetitively crash the system (vmcore) causing prolonged Denial of Service (DoS).

Affected releases are Juniper Networks SRX5000 Series:

  • 12.1X46 versions prior to 12.1X46-D82;
  • 12.3X48 versions prior to 12.3X48-D80;
  • 15.1X49 versions prior to 15.1X49-D160.

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

This issue was seen during production usage.

This issue has been assigned CVE-2019-0044.


The following software releases have been updated to resolve this specific issue: 12.1X46-D82, 12.3X48-D80, 15.1X49-D160 and all subsequent releases.

This issue is being tracked as PR 1362221 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).


There are no known workarounds for this issue.
Limiting the access to the device's management interface only from trusted administrative networks or hosts would minimize the risk.

Software Releases, patches and updates are available at
Modification History:
  • 2019-04-10: Initial Publication.
  • 2019-04-10: Minor description edit.
  • 2019-04-24: Minor edit of the workaround section.


Related Links:
CVSS Score:
7.5 (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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."