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AUSCERT External Security Bulletin Redistribution
ESB-2017.2001
Multiple vulnerabilities have been identified in Juniper Junos
11 August 2017
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AusCERT Security Bulletin Summary
---------------------------------
Product: Juniper Junos
Publisher: Juniper Networks
Operating System: Juniper
Impact/Access: Execute Arbitrary Code/Commands -- Remote/Unauthenticated
Denial of Service -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2017-2347 CVE-2016-3074
Reference: ASB-2016.0051
ESB-2017.0119
ESB-2016.2728
ESB-2016.1379
ESB-2016.1019
Original Bulletin:
https://kb.juniper.net/InfoCenter/index?page=content&id=JSA10795
https://kb.juniper.net/InfoCenter/index?page=content&id=JSA10798
Comment: This bulletin contains two (2) Juniper Networks security advisories.
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017-07 Security Bulletin: Junos: Denial of Service vulnerability in rpd
daemon (CVE-2017-2347)
Product Affected:
This issue affects Junos OS 12.3X48, 13.3, 14.1, 14.1X53, 14.2, 15.1,
15.1X49, 15.1X53, 16.1.
Problem:
A denial of service vulnerability in rpd daemon of Juniper Networks Junos
OS allows a malformed MPLS ping packet to crash the rpd daemon. Repeated
crashes of the rpd daemon can result in an extended denial of service
condition for the device.
The affected releases are Junos OS 12.3X48 prior to 12.3X48-D50, 12.3X48-D55;
13.3 prior to 13.3R10; 14.1 prior to 14.1R4-S13, 14.1R8-S3, 14.1R9;
14.1X53 prior to 14.1X53-D42, 14.1X53-D50; 14.2 prior to 14.2R4-S8,
14.2R7-S6, 14.2R8; 15.1 prior to 15.1F2-S14, 15.1F5-S7, 15.1F6-S4,
15.1F7, 15.1R4-S7, 15.1R5-S1, 15.1R6; 15.1X49 prior to 15.1X49-D100;
15.1X53 prior to 15.1X53-D105, 15.1X53-D47, 15.1X53-D62, 15.1X53-D70;
16.1 prior to 16.1R3-S3, 16.1R4.
No other Juniper Networks products or platforms are affected by this issue.
Juniper SIRT is not aware of any malicious exploitation of this
vulnerability.
This issue has been assigned CVE-2017-2347.
Solution:
The following software releases have been updated to resolve this specific
issue: 12.3X48-D50, 12.3X48-D55, 13.3R10, 14.1R4-S13, 14.1R8-S3, 14.1R9,
14.1X53-D42, 14.1X53-D50, 14.2R4-S8, 14.2R7-S6, 14.2R8, 15.1F2-S14,
15.1F5-S7, 15.1F6-S4, 15.1F7, 15.1R4-S7, 15.1R5-S1, 15.1R6, 15.1X49-D100,
15.1X53-D105, 15.1X53-D47, 15.1X53-D62, 15.1X53-D70, 16.1R3-S3, 16.1R4,
16.2R1, 17.1R1, and all subsequent releases.
This issue is being tracked as PR 1204027 and is visible on the Customer
Support website.
Workaround:
There are no viable workarounds for this issue.
It is good security practice to limit the exploitable attack surface of
critical infrastructure networking equipment. Use access lists or firewall
filters to limit access to the router only from trusted, administrative
networks or hosts.
Implementation:
Security vulnerabilities in Junos are fixed in the next available
Maintenance Release of each supported Junos version. In some cases,
a Maintenance Release is not planned to be available in an appropriate
time-frame. For these cases, Service Releases are made available in order
to be more timely. Security Advisory and Security Notices will indicate
which Maintenance and Service Releases contain fixes for the issues
described. Upon request to JTAC, customers will be provided download
instructions for a Service Release. Although Juniper does not provide
formal Release Note documentation for a Service Release, a list of "PRs
fixed" can be provided on request.
Modification History:
2017-07-12: Initial Publication.
2017-08-09 Problem description update: Confirmed that MPLS OAM
configuration is not a required condition to exploit this vulnerability.
Related Links:
KB16613: Overview of the Juniper Networks SIRT Monthly Security Bulletin
Publication Process
KB16765: In which releases are vulnerabilities fixed?
KB16446: Common Vulnerability Scoring System (CVSS) and Juniper's
Security Advisories
Report a 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."
- -------------------------------------------------------------------------------
2017-07 Security Bulletin: Junos OS: Integer signedness error in GD Graphics
Library (CVE-2016-3074)
Product Affected:
This issue affects Junos OS 12.1X46, 12.3X48, 15.1X49, 14.2, 15.1, 15.1X53,
16.1, 16.2.
Problem:
libgd is an open-source image library which is bundled with PHP version
4.3 and above. An integer signedness vulnerability exists in libgd 2.1.1
which may result in a heap overflow when processing compressed gd2 data.
Juniper SIRT is not aware of any malicious exploitation of this
vulnerability.
This issue has been assigned CVE-2016-3074.
Solution:
The following software releases have been updated to resolve this specific
issue: Junos OS 12.1X46-D65 12.3X48-D40 14.2R8 15.1F7 15.1R5 15.1X49-D70
15.1X53-D47 16.1R4 16.2R2 17.1R1, and all subsequent releases.
This issue is being tracked as PR 1210797 and PR 1218092 and is visible
on the Customer Support website.
Workaround:
o Disable well known services such as J-Web, XNM-SSL, that can utilize
onboard PHP scripting
o Discontinue use of Netconf with PHP
o Discontinue use of PyEZ with PHP
In addition to the recommendations listed above, it is good security
practice to limit the exploitable attack surface of critical infrastructure
networking equipment. Use access lists or firewall filters to limit access
to the device from trusted, administrative networks or hosts.
Implementation:
Security vulnerabilities in Junos are fixed in the next available
Maintenance Release of each supported Junos version. In some cases,
a Maintenance Release is not planned to be available in an appropriate
time-frame. For these cases, Service Releases are made available in order
to be more timely. Security Advisory and Security Notices will indicate
which Maintenance and Service Releases contain fixes for the issues
described. Upon request to JTAC, customers will be provided download
instructions for a Service Release. Although Juniper does not provide
formal Release Note documentation for a Service Release, a list of "PRs
fixed" can be provided on request.
Modification History:
2017-07-12: Initial Publication.
2017-08-09: Minor change on the Solution section, removing 12.3X48-D45
Related Links:
KB16613: Overview of the Juniper Networks SIRT Monthly Security Bulletin
Publication Process
KB16765: In which releases are vulnerabilities fixed?
KB16446: Common Vulnerability Scoring System (CVSS) and Juniper's
Security Advisories
Report a Vulnerability - How to Contact the Juniper Networks Security
Incident Response Team
CVSS Score:
8.1 (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H)
Risk Level:
High
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