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2018-04 Security Bulletin: Junos OS: Kernel crash upon receipt of crafted CLNP packets (CVE-2018-0016)

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Article ID: JSA10844 SECURITY_ADVISORIES Last Updated: 11 Apr 2018Version: 1.0
Product Affected:
This issue affects Junos OS 15.1, 15.1X49, 15.1X53.
Problem:

Receipt of a specially crafted Connectionless Network Protocol (CLNP) packet destined to an interface IP address of a Junos OS device may result in a kernel crash or lead to remote code execution.

Devices are only vulnerable to the specially crafted CLNP packet if 'clns-routing' or ESIS is explicitly configured. Devices without CLNS enabled are not vulnerable to this issue.

This issue only affects devices running Junos OS 15.1. Affected releases are Juniper Networks Junos OS:

  • 15.1 versions prior to 15.1F5-S3, 15.1F6-S8, 15.1F7, 15.1R5;
  • 15.1X49 versions prior to 15.1X49-D60;
  • 15.1X53 versions prior to 15.1X53-D66, 15.1X53-D233, 15.1X53-D471.

Earlier releases are unaffected by this vulnerability, and the issue has been resolved in Junos OS 16.1R1 and all subsequent releases.

The following configuration is required:

set protocols isis clns-routing

Juniper SIRT is not aware of any malicious exploitation of this vulnerability.

This issue was found during internal product security testing or research.

This issue has been assigned CVE-2018-0016.
 

Solution:

The following software releases have been updated to resolve this specific issue: 15.1F5-S3, 15.1F6-S8, 15.1F7, 15.1R5, 15.1X49-D60, 15.1X53-D66, 15.1X53-D233, 15.1X53-D471, 16.1R1, and all subsequent releases.

This issue is being tracked as 1167683 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:

Use access lists or firewall filters to limit access to the device via CLNP only from trusted hosts.
 

Implementation:
Software Releases, patches and updates are available at https://www.juniper.net/support/downloads/.
 
Modification History:
  • 2018-04-11: Initial Publication

 

CVSS Score:
9.8 (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
Severity Level:
Critical
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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