ESB-2018.1120 - [Juniper] Junos OS: Execute arbitrary code/commands - Remote/unauthenticated 2018-04-12

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2018.1120
Junos OS: Kernel crash upon receipt of crafted CLNP packets (CVE-2018-0016)
                               12 April 2018

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

Product:           Junos OS
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-2018-0016  

Original Bulletin: 
   https://kb.juniper.net/InfoCenter/index?page=content&id=JSA10844

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


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


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

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