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AUSCERT External Security Bulletin Redistribution
ESB-2019.3207
Cisco Webex Meetings Mobile (iOS) SSL Certificate Validation Vulnerability
22 August 2019
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AusCERT Security Bulletin Summary
---------------------------------
Product: Cisco Webex Meetings Mobile
Publisher: Cisco Systems
Operating System: Apple iOS
Impact/Access: Read-only Data Access -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2019-1948
Original Bulletin:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190821-webex-ssl-cert
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Cisco Webex Meetings Mobile (iOS) SSL Certificate Validation Vulnerability
Priority: Medium
Advisory ID: cisco-sa-20190821-webex-ssl-cert
First Published: 2019 August 21 16:00 GMT
Version 1.0: Final
Workarounds: No workarounds availableCisco Bug IDs: CSCvq26812
CVE-2019-1948
CWE-295
CVSS Score:
5.9 AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N/E:X/RL:X/RC:X
Summary
o A vulnerability in Cisco Webex Meetings Mobile (iOS) could allow an
unauthenticated, remote attacker to gain unauthorized read access to
sensitive data by using an invalid Secure Sockets Layer (SSL) certificate.
The vulnerability is due to insufficient SSL certificate validation by the
affected software. An attacker could exploit this vulnerability by
supplying a crafted SSL certificate to an affected device. A successful
exploit could allow the attacker to conduct man-in-the-middle attacks to
decrypt confidential information on user connections to the affected
software.
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-webex-ssl-cert
Affected Products
o Vulnerable Products
At the time of publication, this vulnerability affected Cisco Webex
Meetings Mobile (iOS) releases 11.3 to 39.5 if they were running on an
iPhone, iPad, or iPod touch.
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 Webex Meetings Mobile (iOS) releases 39.6
and later contained the fix for this vulnerability.
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-webex-ssl-cert
Revision History
o +---------+--------------------------+---------+--------+-----------------+
| Version | Description | Section | Status | Date |
+---------+--------------------------+---------+--------+-----------------+
| 1.0 | Initial public release. | - | Final | 2019-August-21 |
+---------+--------------------------+---------+--------+-----------------+
- --------------------------END INCLUDED TEXT--------------------
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