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AUSCERT External Security Bulletin Redistribution
ESB-2020.0808
Cisco Remote PHY Device Software Command Injection Vulnerability
5 March 2020
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AusCERT Security Bulletin Summary
---------------------------------
Product: Cisco Remote PHY Device Software
Publisher: Cisco Systems
Operating System: Cisco
Impact/Access: Root Compromise -- Existing Account
Execute Arbitrary Code/Commands -- Existing Account
Denial of Service -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2020-3176
Original Bulletin:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-rphy-cmdinject-DpEjeTgF
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Cisco Remote PHY Device Software Command Injection Vulnerability
Priority: Medium
Advisory ID: cisco-sa-rphy-cmdinject-DpEjeTgF
First Published: 2020 March 4 16:00 GMT
Version 1.0: Final
Workarounds: No workarounds availableCisco Bug IDs: CSCvs10005
CVE-2020-3176
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 Cisco Remote PHY Device Software could allow an
authenticated, local attacker to execute commands on the underlying Linux
shell of an affected device with root privileges.
The vulnerability exists because the affected software does not properly
sanitize user-supplied input. An attacker who has valid administrator
access to an affected device could exploit this vulnerability by supplying
certain CLI commands with crafted arguments. A successful exploit could
allow the attacker to run arbitrary commands as the root user, which could
result in a complete system compromise.
Cisco has released software updates that address the vulnerability
described in this advisory. 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-rphy-cmdinject-DpEjeTgF
Affected Products
o Vulnerable Products
At the time of publication, this vulnerability affected the following Cisco
software releases with default configuration:
Remote PHY 120: earlier than Release 7.7
Remote PHY 220: all releases
Remote PHY Shelf 7200: all releases
See the Details section in the bug ID(s) at the top of this advisory for
the most complete and current information.
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 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.
Fixed Releases
At the time of publication, Cisco Remote PHY 120 Software releases 7.7 and
later contained the fix for this vulnerability.
At the time of publication, Cisco had not released updates that address
this vulnerability for Cisco Remote PHY 220 Software or Cisco Remote PHY
Shelf 7200 Software.
See the Details section in the bug ID(s) at the top of this advisory for
the most complete and current information.
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-rphy-cmdinject-DpEjeTgF
Revision History
o +----------+---------------------------+----------+--------+--------------+
| Version | Description | Section | Status | Date |
+----------+---------------------------+----------+--------+--------------+
| 1.0 | Initial public release. | - | Final | 2020-MAR-04 |
+----------+---------------------------+----------+--------+--------------+
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