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AUSCERT External Security Bulletin Redistribution
ESB-2019.2205
Cisco Meeting Server CLI Command Injection Vulnerability
20 June 2019
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AusCERT Security Bulletin Summary
---------------------------------
Product: Cisco Meeting Server
Publisher: Cisco Systems
Operating System: Cisco
Impact/Access: Root Compromise -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2019-1623
Original Bulletin:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190619-cms-codex
- --------------------------BEGIN INCLUDED TEXT--------------------
Cisco Meeting Server CLI Command Injection Vulnerability
Priority: High
Advisory ID: cisco-sa-20190619-cms-codex
First Published: 2019 June 19 16:00 GMT
Version 1.0: Final
Workarounds: No workarounds availableCisco Bug IDs: CSCvk42093
CVE-2019-1623
CWE-77
CVSS Score:
6.7 AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:X/RL:X/RC:X
Summary
o A vulnerability in the CLI configuration shell of Cisco Meeting Server
could allow an authenticated, local attacker to inject arbitrary commands
as the root user.
The vulnerability is due to insufficient input validation during the
execution of a vulnerable CLI command. An attacker with administrator-level
credentials could exploit this vulnerability by injecting crafted arguments
during command execution. A successful exploit could allow the attacker to
perform arbitrary code execution as root on an affected product.
Cisco has released software updates that address this vulnerability. There
are no workarounds that address this vulnerability.
This advisory is available at the following link:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/
cisco-sa-20190619-cms-codex
Affected Products
o Vulnerable Products
This vulnerability affects Cisco Meeting Server deployments that are
running Software Releases prior to 2.2.14 and 2.3.8.
Administrators can determine which Cisco Meeting Server Software release is
running on a device by using the version command in the CLI. The following
example shows the output of the command for a device that is running Cisco
Meeting Server Software Release 2.6.1:
system> version
2.6.1
Products Confirmed Not Vulnerable
Only products listed in the Vulnerable Products section of this advisory
are known to be affected by this vulnerability.
Details
o Cisco Meeting Server incorporates video, audio, and content-sharing
capabilities into software that can be accessed via a conference room,
desktop, or mobile device. Cisco Meeting Server works across Cisco video
rooms and connects with Skype for Business and other hardware providers to
allow a seamless meeting architecture.
Workarounds
o There are no workarounds that address this vulnerability.
Fixed Software
o Cisco has released free software updates that address the vulnerability
described in this advisory. Customers may only install and expect support
for software versions and feature sets for which they have purchased a
license. By installing, downloading, accessing, or otherwise using such
software upgrades, customers agree to follow the terms of the Cisco
software license:
https://www.cisco.com/c/en/us/products/end-user-license-agreement.html
Additionally, customers may only download software for which they have a
valid license, procured from Cisco directly, or through a Cisco authorized
reseller or partner. In most cases this will be a maintenance upgrade to
software that was previously purchased. Free security software updates do
not entitle customers to a new software license, additional software
feature sets, or major revision upgrades.
When considering software upgrades, customers are advised to regularly
consult the advisories for Cisco products, which are available from the
Cisco Security Advisories and Alerts page , to determine exposure and a
complete upgrade solution.
In all cases, customers should ensure that the devices to be upgraded
contain sufficient memory and confirm that current hardware and software
configurations will continue to be supported properly by the new release.
If the information is not clear, customers are advised to contact the Cisco
Technical Assistance Center (TAC) or their contracted maintenance
providers.
Customers Without Service Contracts
Customers who purchase directly from Cisco but do not hold a Cisco service
contract and customers who make purchases through third-party vendors but
are unsuccessful in obtaining fixed software through their point of sale
should obtain upgrades by contacting the Cisco TAC:
https://www.cisco.com/c/en/us/support/web/tsd-cisco-worldwide-contacts.html
Customers should have the product serial number available and be prepared
to provide the URL of this advisory as evidence of entitlement to a free
upgrade.
Fixed Releases
Customers are advised to upgrade to an appropriate fixed software release
as indicated in the following table:
Cisco Meeting Server Software First Fixed Release for This
Release Vulnerability
2.2 2.2.14 ^1
2.3 2.3.8 ^1
2.4 Not vulnerable
2.5 Not vulnerable
2.6 Not vulnerable
1. Cisco Meeting Server Software Releases 2.2 and 2.3 have reached End of
Software Maintenance. For information about the Cisco Meeting Server
Software release model, refer to Cisco Meeting Server: End of maintenance
and support policy .
Exploitation and Public Announcements
o The Cisco Product Security Incident Response Team (PSIRT) is not aware of
any public announcements or malicious use of the vulnerability that is
described in this advisory.
Source
o This vulnerability was found during internal security testing.
Cisco Security Vulnerability Policy
o To learn about Cisco security vulnerability disclosure policies and
publications, see the Security Vulnerability Policy . This document also
contains instructions for obtaining fixed software and receiving security
vulnerability information from Cisco.
URL
o https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/
cisco-sa-20190619-cms-codex
Revision History
o +---------+---------------------------+---------+--------+---------------+
| Version | Description | Section | Status | Date |
+---------+---------------------------+---------+--------+---------------+
| 1.0 | Initial public release. | - | Final | 2019-June-19 |
+---------+---------------------------+---------+--------+---------------+
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