ESB-2019.1267 - [Appliance] Juniper SRX Series: Denial of service - Remote/unauthenticated 2019-04-12

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2019.1267
  JSA10922 - 2019-04 Security Bulletin: SRX Series: A remote attacker may
        cause a high CPU Denial of Service to the device when proxy
                    ARP is configured. (CVE-2019-0033)
                               12 April 2019

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

Product:           Juniper SRX Series
Publisher:         Juniper Networks
Operating System:  Network Appliance
Impact/Access:     Denial of Service -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2019-0038 CVE-2019-0033 

Original Bulletin: 
   http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10922
   http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10927

Comment: This bulletin contains two (2) Juniper Networks security advisories.

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2019-04 Security Bulletin: SRX Series: A remote attacker may cause a high CPU 
Denial of Service to the device when proxy ARP is configured. (CVE-2019-0033)

Article ID:   JSA10922

Last Updated: 10 Apr 2019

Version:      2.0

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

A firewall bypass vulnerability in the proxy ARP service of Juniper Networks
Junos OS allows an attacker to cause a high CPU condition leading to a Denial
of Service (DoS).

This issue affects only IPv4.

Affected releases are Juniper Networks Junos OS:

  o 12.1X46 versions above and including 12.1X46-D25 prior to 12.1X46-D71,
    12.1X46-D73 on SRX Series;
  o 12.3X48 versions prior to 12.3X48-D50 on SRX Series;
  o 15.1X49 versions prior to 15.1X49-D75 on SRX Series.

An example configuration snippet is below:

root@device# show security nat proxy-arp
interface ge-0/0/0.0 {
address {
2.2.2.5/32;
}
}

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-2019-0033.

Solution:

The following software releases have been updated to resolve this specific
issue: 12.1X46-D71, 12.1X46-D73, 12.3X48-D50, 15.1X49-D75, 17.3R1, and all
subsequent releases.

This issue is being tracked as PR 1208910 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:

Discontinue use of proxy ARP.

An example configuration snippet is below:

deactivate security nat proxy-arp interface ge-0/0/0.0 address 2.2.2.5/32

(or)

delete security nat proxy-arp interface ge-0/0/0.0 address 2.2.2.5/32

There are no other viable workarounds for this issue.

Implementation:
Software Releases, patches and updates are available at https://www.juniper.net
/support/downloads/ .

Modification History:

  o 2019-04-10: Initial Publication.

Related Links:

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

  o KB16765: In which releases are vulnerabilities fixed

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

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

  o CVE-2019-0033 at cve.mitre.org

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."

===============================================================================

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

Article ID:   JSA10927

Last Updated: 10 Apr 2019

Version:      1.0

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:

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

Implementation:
Software Releases, patches and updates are available at https://www.juniper.net
/support/downloads/ .

Modification History:

  o 2019-04-10: Initial Publication

Related Links:

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

  o KB16765: In which releases are vulnerabilities fixed

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

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

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."

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