CVE-2018-14649

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Last Modified: UTC

Description

It was found that rbd-target-api service provided by ceph-iscsi-cli was running in debug mode. An unauthenticated attacker could use this to remotely execute arbitrary code and escalate privileges.

It was found that rbd-target-api service provided by ceph-iscsi-cli was running in debug mode. An unauthenticated attacker could use this to remotely execute arbitrary code and escalate privileges.

Statement

This issue affects the versions of ceph-iscsi-cli as shipped with Red Hat Ceph Storage 2 and 3. This flaw does not affect python-werkzeug library. It depends on if application uses python-werkzeug library with debug mode enabled.

This issue affects the versions of ceph-iscsi-cli as shipped with Red Hat Ceph Storage 2 and 3. This flaw does not affect python-werkzeug library. It depends on if application uses python-werkzeug library with debug mode enabled.

Mitigation

To stop werkzeug debug mode started by rbd-target-api which is provided by ceph-iscsi-cli:

1. ~]# systemctl stop rbd-target-api

2. ~]# vi /usr/bin/rbd-target-api

# Start the API server
...
737 app.run(host='0.0.0.0',
738 port=settings.config.api_port,
739 debug=True, <==== change this to debug=False
                    use_evalex=False, <=== add this line to disable debugger code execution
740 use_reloader=False,
741 ssl_context=context)
...

after changes it should be

# Start the API server
...
737 app.run(host='0.0.0.0',
738 port=settings.config.api_port,
739 debug=False,
                    use_evalex=False,
740 use_reloader=False,
741 ssl_context=context)
...

3. ~]# systemctl start rbd-target-api

4. Limit exposure of port 5000/tcp: This port should be opened to trusted hosts which require to run 'gwcli'.

Additional information

  • Bugzilla 1632078: ceph-iscsi-cli: rbd-target-api service runs in debug mode allowing for remote command execution
  • CWE-77: Improper Neutralization of Special Elements used in a Command ('Command Injection')
  • FAQ: Frequently asked questions about CVE-2018-14649

Common Vulnerability Scoring System (CVSS) Score Details

Important note

CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).

CVSS v3 Score Breakdown
Red HatNVD

CVSS v3 Base Score

9.8

9.8

Attack Vector

Network

Network

Attack Complexity

Low

Low

Privileges Required

None

None

User Interaction

None

None

Scope

Unchanged

Unchanged

Confidentiality Impact

High

High

Integrity Impact

High

High

Availability Impact

High

High

CVSS v3 Vector

Red Hat: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

NVD: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Frequently Asked Questions

Why is Red Hat's CVSS v3 score or Impact different from other vendors?

My product is listed as "Under investigation" or "Affected", when will Red Hat release a fix for this vulnerability?

What can I do if my product is listed as "Will not fix"?

What can I do if my product is listed as "Fix deferred"?

What is a mitigation?

I have a Red Hat product but it is not in the above list, is it affected?

Why is my security scanner reporting my product as vulnerable to this vulnerability even though my product version is fixed or not affected?

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