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AUSCERT External Security Bulletin Redistribution
ESB-2019.0540
Cisco Webex Teams for iOS Arbitrary File Upload Vulnerability
21 February 2019
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AusCERT Security Bulletin Summary
---------------------------------
Product: Cisco Webex Teams
Publisher: Cisco Systems
Operating System: IOS
Impact/Access: Create Arbitrary Files -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2019-1689
Original Bulletin:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190220-webx-ios-file
- --------------------------BEGIN INCLUDED TEXT--------------------
Cisco Webex Teams for iOS Arbitrary File Upload Vulnerability
Priority: Medium
Advisory ID: cisco-sa-20190220-webx-ios-file
First Published: 2019 February 20 16:00 GMT
Version 1.0: Final
Workarounds: No workarounds available
Cisco Bug IDs: CSCvn16403
CVE-2019-1689
CWE-20
CVSSÂ Score:
7.3 AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:H/E:X/RL:X/RC:X
Summary
o
A vulnerability in the client application for iOS of Cisco Webex Teams
could allow an authenticated, remote attacker to upload arbitrary files
within the scope of the iOS application.
The vulnerability is due to improper input validation in the client
application. An attacker could exploit this vulnerability by sending a
malicious file to a targeted user and persuading the user to manually open
it. An exploit could allow the attacker to overwrite sensitive application
files and eventually cause a denial of service (DoS) condition by
foreclosing future access to the system to the targeted user.
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-20190220-webx-ios-file
Affected Products
o Vulnerable Products
This vulnerability affects the client application for iOS of Cisco Webex
Teams. 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 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-20190220-webx-ios-file
Revision History
o
+----------+--------------------------+----------+--------+-------------------+
| Version | Description | Section | Status | Date |
+----------+--------------------------+----------+--------+-------------------+
| 1.0 | Initial public release. | -- | Final | 2019-February-20 |
+----------+--------------------------+----------+--------+-------------------+
- --------------------------END INCLUDED TEXT--------------------
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