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AUSCERT External Security Bulletin Redistribution
ESB-2019.2450
Cisco Unified Communications Domain Manager Restricted Shell
Escape Vulnerability
4 July 2019
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AusCERT Security Bulletin Summary
---------------------------------
Product: Cisco Unified Communications Domain Manager
Publisher: Cisco Systems
Operating System: Cisco
Impact/Access: Increased Privileges -- Existing Account
Unauthorised Access -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2019-1911
Original Bulletin:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190703-cucdm-rsh
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Cisco Unified Communications Domain Manager Restricted Shell Escape
Vulnerability
Priority: Medium
Advisory ID: cisco-sa-20190703-cucdm-rsh
First Published: 2019 July 3 16:00 GMT
Version 1.0: Final
Workarounds: No workarounds available
Cisco Bug IDs: CSCvj07167
CVE-2019-1911
CWE-216
CVSS Score:
5.3 AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:X/RL:X/RC:X
Summary
o A vulnerability in the CLI of Cisco Unified Communications Domain Manager
(Cisco Unified CDM) Software could allow an authenticated, local attacker
to escape the restricted shell.
The vulnerability is due to insufficient input validation of shell
commands. An attacker could exploit this vulnerability by executing crafted
commands in the shell. A successful exploit could allow the attacker to
escape the restricted shell and access commands in the context of the
restricted shell user, which does not have root privileges.
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-20190703-cucdm-rsh
Affected Products
o The information provided in this advisory is the best available information
as of the time of publication. Please consult the Release Note Enclosure on
any associated bug ID for the most complete, accurate, and up-to-date
information.
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 additional information is needed, customers are advised to contact the
Cisco Technical Assistance Center (TAC) or their contracted maintenance
providers.
Vulnerable Products
At the time of publication, this vulnerability affected Cisco Unified CDM
Releases 11.5(3) PB3 and prior.
Products Confirmed Not Vulnerable
Only products listed in the Vulnerable Products section of this advisory
are known to be affected by this vulnerability.
Fixed Releases
At the time of publication, Releases 11.5(3) PB4 and later contained the
fix for this vulnerability.
Workarounds
o There are no workarounds that address this vulnerability.
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-20190703-cucdm-rsh
Revision History
o +---------+---------------------------+---------+--------+---------------+
| Version | Description | Section | Status | Date |
+---------+---------------------------+---------+--------+---------------+
| 1.0 | Initial public release. | - | Final | 2019-July-03 |
+---------+---------------------------+---------+--------+---------------+
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