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2019-01 Security Bulletin: Junos OS: SRX Series: Crafted HTTP traffic may cause UTM to consume all mbufs, leading to Denial of Service (CVE-2019-0010)

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

An SRX Series Service Gateway configured for Unified Threat Management (UTM) may experience a denial of service due to the receipt of crafted HTTP traffic. Each crafted HTTP packet inspected by UTM consumes mbufs which can be identified through the following log messages:

all_logs.0:Jun 8 03:25:03 srx1 node0.fpc4 : SPU3 jmpi mbuf stall 50%.
all_logs.0:Jun 8 03:25:13 srx1 node0.fpc4 : SPU3 jmpi mbuf stall 51%.
all_logs.0:Jun 8 03:25:24 srx1 node0.fpc4 : SPU3 jmpi mbuf stall 52%.

Eventually the system runs out of mbufs and either triggers a failover in a high-availability (HA) clustered environment, or causes traffic forwarding to stop on a standalone device.

This issue only occurs when HTTP AV inspection is configured. Devices configured for Web Filtering alone are unaffected by this issue.

Affected releases are Junos OS on SRX Series:

  • 12.1X46 versions prior to 12.1X46-D81;
  • 12.3X48 versions prior to 12.3X48-D77;
  • 15.1X49 versions prior to 15.1X49-D101, 15.1X49-D110.

This issue might occur when UTM policy is configured and applied to the security policy that inspect HTTP traffic :

[security utm feature-profile anti-virus]

in combination with:

[security policies from-zone to-zone … then permit application-services utm-policy <policy-name>]

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-2019-0010.


The following software releases have been updated to resolve this specific issue: Junos OS 12.1X46-D81, 12.3X48-D77, 15.1X49-D101, 15.1X49-D110, 17.3R1, and all subsequent releases.

This issue is being tracked as PR 1283806 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 viable workarounds for this issue.
Software Releases, patches and updates are available at
Modification History:
2019-01-09: Initial publication
2019-01-11: Clarified that a failover will only occurs in a HA clustered environment

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."