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2018-10 Security Bulletin: Junos OS: Invalid IP/mask learned from DHCP server might cause the device control daemon (dcd) process crash (CVE-2018-0060)

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Article ID: JSA10895 SECURITY_ADVISORIES Last Updated: 30 Oct 2018Version: 3.0
Product Affected:
This issue affects Junos OS 12.1X46, 12.3X48, 14.1X53, 15.1, 15.1X49, 15.1X53, 16.1, 16.2, 17.1, 17.2, 17.3.
Problem:

An improper input validation weakness in the device control daemon process (dcd) of Juniper Networks Junos OS allows an attacker to cause a Denial of Service to the dcd process and interfaces and connected clients when the Junos device is requesting an IP address for itself.

Junos devices are not vulnerable to this issue when not configured to use DHCP.

Affected releases are Juniper Networks Junos OS:

  • 12.1X46 versions prior to 12.1X46-D40 on SRX Series;
  • 12.3X48 versions prior to 12.3X48-D20 on SRX Series;
  • 14.1X53 versions prior to 14.1X53-D40 on EX2200/VC, EX3200, EX3300/VC, EX4200, EX4300, EX4550/VC, EX4600, EX6200, EX8200/VC (XRE), QFX3500, QFX3600, QFX5100;
  • 15.1X49 versions prior to 15.1X49-D20 on SRX Series;
  • 15.1X53 versions prior to 15.1X53-D68 on QFX10000 Series;
  • 15.1X53 versions prior to 15.1X53-D235 on QFX5200/QFX5110;
  • 15.1X53 versions prior to 15.1X53-D495 on NFX150, NFX250;
  • 15.1X53 versions prior to 15.1X53-D590 on EX2300/EX3400;
  • 15.1 versions prior to 15.1R7-S2

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-2018-0060.
 

Solution:

The following software releases have been updated to resolve this specific issue: 12.1X46-D40, 12.3X48-D20, 14.1X53-D40, 15.1X49-D20, 15.1X53-D68, 15.1X53-D235, 15.1X53-D495, 15.1X53-D590, 15.1R7-S2, 16.1R1 and all subsequent releases.

This issue is being tracked as PR 1082817 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:
  1. Configure the device to use static IP addresses for all interfaces.
  2. Disable DHCP services.
Implementation:
Software Releases, patches and updates are available at https://www.juniper.net/support/downloads/.
 
Modification History:
‚Äč2018-10-10: Initial publication
2018-10-31: Updated Solution section resolved in releases to read 16.1R1 and all subsequent releases.  Removed all affected releases from Problem section corresponding to this change.
CVSS Score:
5.3 (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N)
Severity Level:
Medium
Severity 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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