Operating System:

[Juniper]

Published:

10 October 2019

Protect yourself against future threats.

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2019.3796
JSA10960 - 2019-10 Security Bulletin: Junos OS: Insecure management daemon
 (MGD) configuration may allow local privilege escalation (CVE-2019-0061)
                              10 October 2019

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

Product:           Junos OS
Publisher:         Juniper Networks
Operating System:  Juniper
Impact/Access:     Administrator Compromise -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2019-0061  

Original Bulletin: 
   http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10960

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2019-10 Security Bulletin: Junos OS: Insecure management daemon (MGD) configuration may allow local privilege escalation (CVE-2019-0061)

Article ID:   JSA10960

Last Updated: 09 Oct 2019

Version:      4.0

Product Affected:
This issue affects Junos OS 15.1X49, 15.1X53, 16.1, 16.2, 17.1, 17.2, 17.3,
17.4, 18.1, 18.2, 18.3, 18.4.
Problem:
The management daemon (MGD) is responsible for all configuration and management
operations in Junos OS. The Junos CLI communicates with MGD over an internal
unix-domain socket and is granted special permission to open this protected
mode socket. Due to a misconfiguration of the internal socket, a local,
authenticated user may be able to exploit this vulnerability to gain
administrative privileges.

This issue only affects Linux-based platforms. FreeBSD-based platforms are
unaffected by this vulnerability.

Exploitation of this vulnerability requires Junos shell access. This issue
cannot be exploited from the Junos CLI.

This issue affects Juniper Networks Junos OS:

  o 15.1X49 versions prior to 15.1X49-D171, 15.1X49-D180;
  o 15.1X53 versions prior to 15.1X53-D496, 15.1X53-D69;
  o 16.1 versions prior to 16.1R7-S4;
  o 16.2 versions prior to 16.2R2-S9;
  o 17.1 versions prior to 17.1R3;
  o 17.2 versions prior to 17.2R1-S8, 17.2R2-S7, 17.2R3-S1;
  o 17.3 versions prior to 17.3R3-S4;
  o 17.4 versions prior to 17.4R1-S6, 17.4R1-S7, 17.4R2-S3, 17.4R3;
  o 18.1 versions prior to 18.1R2-S4, 18.1R3-S4;
  o 18.2 versions prior to 18.2R1-S5, 18.2R2-S2, 18.2R3;
  o 18.3 versions prior to 18.3R1-S3, 18.3R2;
  o 18.4 versions prior to 18.4R1-S2, 18.4R2.

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-2019-0061 .

Solution:
The following software releases have been updated to resolve this specific
issue: 15.1X49-D171, 15.1X49-D180, 15.1X53-D496, 15.1X53-D69, 16.1R7-S4,
16.2R2-S9, 17.1R3, 17.2R1-S8, 17.2R2-S7, 17.2R3-S1, 17.3R3-S4, 17.4R1-S6,
17.4R1-S7, 17.4R2-S3, 17.4R3, 18.1R2-S4, 18.1R3-S4, 18.2R1-S5, 18.2R2-S2,
18.2R3, 18.3R1-S3, 18.3R2, 18.4R1-S2, 18.4R2, 19.1R1, and all subsequent
releases.

This issue is being tracked as PR 1406219 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:
Limit access to the Junos shell to only trusted administrators.
Implementation:
Software Releases, patches and updates are available at https://www.juniper.net
/support/downloads/ .

Modification History:
2019-10-09: 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-2019-0061 at cve.mitre.org

CVSS Score:
7.8 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
Severity Level:
High
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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