Juniper SRX Series: Denial of Service -- Remote/Unauthenticated

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2019.0086
 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)
                              10 January 2019

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        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           Juniper SRX Series
Publisher:         Juniper Networks
Operating System:  Juniper
Impact/Access:     Denial of Service -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2019-0010  

Original Bulletin: 
   https://kb.juniper.net/InfoCenter/index?page=content&id=JSA10910

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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)

Product Affected:	

This issue affects Junos OS 12.1X46, 12.3X48, 15.1X49. 

Affected platforms: 	

SRX Series.

Problem:

An SRX Series Service Gateway configured for Unified Threat Management (UTM) 
may experience a system crash with the error message "mbuf exceed" -- an 
indication of memory buffer exhaustion -- 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 the system crashes (fails over) 
with the error "mbuf exceed".

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.
 
Solution:

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).
 
Workaround:
There are no viable workarounds for this issue.
 
Implementation:
Software Releases, patches and updates are available at 
https://www.juniper.net/support/downloads/.
 
Modification History:

2019-01-09: Initial publication

Related Links:

KB16613: Overview of the Juniper Networks SIRT Quarterly Security Bulletin 
Publication Process

KB16765: In which releases are vulnerabilities fixed?

KB16446: Common Vulnerability Scoring System (CVSS) and Juniper's Security 
Advisories

Report a Security Vulnerability - How to Contact the Juniper Networks Security 
Incident Response Team

CVE-2019-0010 at cve.mitre.org

https://kb.juniper.net/JSA10910

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:
High

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."

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