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AUSCERT External Security Bulletin Redistribution
ESB-2019.1532
Cisco Expressway Series Directory Traversal Vulnerability
3 May 2019
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AusCERT Security Bulletin Summary
---------------------------------
Product: Cisco Expressway Series
Publisher: Cisco Systems
Operating System: Cisco
Impact/Access: Unauthorised Access -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2019-1854
Original Bulletin:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190501-expressway-traversal
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Cisco Expressway Series Directory Traversal Vulnerability
Priority: Medium
Advisory ID: cisco-sa-20190501-expressway-traversal
First Published: 2019 May 1 16:00 GMT
Version 1.0: Final
Workarounds: No workarounds availableCisco Bug IDs: CSCvo47769
CVE-2019-1854
CWE-22
CVSS Score:
4.1 AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:L/A:N/E:X/RL:X/RC:X
Summary
o A vulnerability in the management web interface of Cisco Expressway Series
could allow an authenticated, remote attacker to perform a directory
traversal attack against an affected device.
The vulnerability is due to insufficient input validation on the web
interface. An attacker could exploit this vulnerability by sending a
crafted HTTP request to the web interface. A successful exploit could allow
the attacker to bypass security restrictions and access the web interface
of a Cisco Unified Communications Manager associated with the affected
device. Valid credentials would still be required to access the Cisco
Unified Communications Manager interface.
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-20190501-expressway-traversal
Affected Products
o Vulnerable Products
This vulnerability affects Cisco Expressway Series. For information about
affected software releases, consult the Cisco bug ID(s) 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 Cisco would like to thank Phillip Huppert of RedTeam Pentesting GmbH for
reporting this vulnerability.
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-20190501-expressway-traversal
Revision History
o +----------+---------------------------+----------+--------+--------------+
| Version | Description | Section | Status | Date |
+----------+---------------------------+----------+--------+--------------+
| 1.0 | Initial public release. | - | Final | 2019-May-01 |
+----------+---------------------------+----------+--------+--------------+
- --------------------------END INCLUDED TEXT--------------------
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