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AUSCERT External Security Bulletin Redistribution
ESB-2019.3203
Cisco Remote PHY Device Software Command Injection Vulnerability
22 August 2019
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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
Resolution: Patch/Upgrade
CVE Names: CVE-2019-1839
Original Bulletin:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190821-rphy
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Cisco Remote PHY Device Software Command Injection Vulnerability
Priority: Medium
Advisory ID: cisco-sa-20190821-rphy
First Published: 2019 August 21 16:00 GMT
Version 1.0: Final
Workarounds: No workarounds availableCisco Bug IDs: CSCvo00189CSCvo18056CSCvo49688CSCvp32064
CVE-2019-1839
CWE-20
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 occurs because the affected software improperly sanitizes
user-supplied input. An attacker who has valid administrator access to an
affected device could exploit this vulnerability by supplying various CLI
commands with crafted arguments. A successful exploit could allow the
attacker to run arbitrary commands as the root user, allowing complete
compromise of the system.
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-20190821-rphy
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 6.4
Remote PHY 220: earlier than 3.1
Remote PHY Shelf 7200: earlier than 1.2
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, the following Cisco software releases contained
the fix for this vulnerability:
Remote PHY 120: 6.4 and later
Remote PHY 220: 3.1 (future release)
Remote PHY Shelf 7200: 1.2 and later
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-20190821-rphy
Revision History
o +---------+--------------------------+---------+--------+-----------------+
| Version | Description | Section | Status | Date |
+---------+--------------------------+---------+--------+-----------------+
| 1.0 | Initial public release. | - | Final | 2019-August-21 |
+---------+--------------------------+---------+--------+-----------------+
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