Cisco Security Advisory
Click Icon to Copy Verbose Score
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N/E:X/RL:X/RC:X
-
A vulnerability in the Telnet CLI command of Cisco NX-OS System Software running on Cisco Nexus Series Switches could allow an authenticated, local attacker to perform a command injection attack.
The vulnerability is due to insufficient input validation of command arguments. An attacker could exploit this vulnerability by injecting crafted command arguments into the Telnet CLI command. An exploit could allow the attacker to read or write arbitrary files at the user’s privilege level outside of the user’s path.
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-20170517-nss1
-
Vulnerable Products
This vulnerability affects the following Cisco Nexus Series Switches running in default configurations.
Cisco Nexus 3000 Series Switches
Cisco Nexus 3500 Platform Switches
Cisco Nexus 5000 Series Switches
Cisco Nexus 6000 Series Switches
Cisco Nexus 7000 Series Switches
Cisco Nexus 9500 R-Series Switches
Cisco Nexus 9000 Series Switches - Standalone, NX-OS mode
Cisco MDS 9000 Series Multilayer Switches
For information about affected software releases, consult the Cisco bug ID at the top of this advisory.Products Confirmed Not Vulnerable
Cisco Nexus 9000 Series Fabric Switches - ACI mode
No other Cisco products are currently known to be affected by this vulnerability.
-
There are no workarounds that address this vulnerability.
-
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.
-
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.
-
This vulnerability was found during internal security testing.
-
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.
-
Show LessVersion Description Section Status Date 1.1 Updated list of vulnerable products. Vulnerable Products Final 2017-July-05 1.0 Initial public release. — Final 2017-May-17
-
THIS DOCUMENT IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE INFORMATION ON THE DOCUMENT OR MATERIALS LINKED FROM THE DOCUMENT IS AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS DOCUMENT AT ANY TIME.
A standalone copy or paraphrase of the text of this document that omits the distribution URL is an uncontrolled copy and may lack important information or contain factual errors. The information in this document is intended for end users of Cisco products.