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AUSCERT External Security Bulletin Redistribution
ESB-2019.0215
Cisco Enterprise NFV Infrastructure Software Linux Shell
Access Vulnerability
24 January 2019
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AusCERT Security Bulletin Summary
---------------------------------
Product: Cisco Enterprise NFV Infrastructure Software
Publisher: Cisco Systems
Operating System: Cisco
Impact/Access: Unauthorised Access -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2019-1656
Original Bulletin:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190123-nfvis-shell-access
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Cisco Enterprise NFV Infrastructure Software Linux Shell Access Vulnerability
Priority: Medium
Advisory ID: cisco-sa-20190123-nfvis-shell-access
First Published: 2019 January 23 16:00 GMT
Version 1.0: Final
Workarounds: No workarounds available
Cisco Bug IDs: CSCvm80829
CVE-2019-1656
CWE-20
CVSSÂ 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 Enterprise NFV Infrastructure Software
(NFVIS) could allow an authenticated, local attacker to access the shell
of the underlying Linux operating system on the affected device.
The vulnerability is due to improper input validation in the affected
software. An attacker could exploit this vulnerability by sending crafted
commands to the affected device. An exploit could allow the attacker to
gain shell access with a nonroot user account to the underlying Linux
operating system on the affected device and potentially access system
configuration files with sensitive information.
This vulnerability only affects console connections from CIMC. It does not
apply to remote connections, such as telnet or SSH.
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-20190123-nfvis-shell-access
Affected Products
o Vulnerable Products
This vulnerability affects Cisco Enterprise NFV Infrastructure Software
(NFVIS). For information about affected software releases, consult the
Cisco bug IDs at the top of this advisory.
Products Confirmed Not Vulnerable
Only products listed in the Vulnerable Products section of this advisory
are known to be affected by this vulnerability.
Workarounds
o There are no workarounds that address this vulnerability.
Fixed Software
o For information about fixed software releases, consult the Cisco bug ID(s)
at the top of this advisory.
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.
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.
Subscribe to Cisco Security Notifications
o Subscribe
URL
o https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190123-nfvis-shell-access
Revision History
o
+----------+---------------------------+----------+--------+------------------+
| Version | Description | Section | Status | Date |
+----------+---------------------------+----------+--------+------------------+
| 1.0 | Initial public release. | | Final | 2019-January-23 |
+----------+---------------------------+----------+--------+------------------+
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