2019-04 Security Bulletin: SRX Series: Crafted packets destined to fxp0 management interface on SRX340/SRX345 devices can lead to DoS (CVE-2019-0038)

  [JSA10927] Show Article Properties


Product Affected:
This issue affects Junos OS 15.1X49, 17.3, 17.4, 18.1, 18.2, 18.3. Affected platforms: SRX340/SRX345.
Problem:

Crafted packets destined to the management interface (fxp0) of an SRX340 or SRX345 services gateway may create a denial of service (DoS) condition due to buffer space exhaustion.

This issue only affects the SRX340 and SRX345 services gateways. No other products or platforms are affected by this vulnerability.

Affected releases are Juniper Networks Junos OS:

  • 15.1X49 versions prior to 15.1X49-D160 on SRX340/SRX345;
  • 17.3 on SRX340/SRX345;
  • 17.4 versions prior to 17.4R2-S3, 17.4R3 on SRX340/SRX345;
  • 18.1 versions prior to 18.1R3-S1 on SRX340/SRX345;
  • 18.2 versions prior to 18.2R2 on SRX340/SRX345;
  • 18.3 versions prior to 18.3R1-S2, 18.3R2 on SRX340/SRX345.

This issue does not affect Junos OS releases prior to 15.1X49 on any platform.

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

The following log message may be displayed when the device is in this condition:

octagl_output:1093: out of buf
octagl_output:1093: out of buf
octagl_output:1093: out of buf

Administrators can monitor buffer space utilization by executing the command:

request pfe execute target fwdd command "show octeon fpa buffers"
================ cluster1.node0 ================
SENT: Ukern command: show octeon fpa buffers
FPA 0: Avail: 23632, Errors: 0
FPA 1: Avail: 22444, Errors: 0
FPA 2: Avail: 0, Errors: 0
FPA 3: Avail: 135, Errors: 0
FPA 4: Avail: 0, Errors: 0

This issue was seen during production usage.

This issue has been assigned CVE-2019-0038.
 

Solution:

The following software releases have been updated to resolve this specific issue: Junos OS 15.1X49-D160, 17.4R2-S3, 17.4R3, 18.1R3-S1, 18.2R2, 18.3R1-S2, 18.3R2, 18.4R1, and all subsequent releases.

This issue is being tracked as PR 1377152 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:

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.
 

Implementation:
Software Releases, patches and updates are available at https://www.juniper.net/support/downloads/.
 
Modification History:
  • 2019-04-10: Initial Publication
  • 2019-04-24: Added recommendation to limit access to device's management interface
     
Related Links:
CVSS Score:
6.5 (CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
Risk Level:
Medium
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."