Multiple Cisco WebEx products contain a vulnerability that could allow an unauthenticated, remote attacker to view sensitive information. Updates are available.
A vulnerability in HTTP processing in multiple Cisco WebEx products could allow an unauthenticated, remote attacker to read uninitialized memory.
The vulnerability is due to insufficient input validation. An attacker could exploit this vulnerability by passing a crafted request to a WebEx node. An exploit could allow the attacker to read uninitialized memory.
Cisco has confirmed the vulnerability in a security notice and software updates are available.
At the time this alert was first published, the following Cisco WebEx products were vulnerable:
Cisco WebEx Meetings Server 1.1 and prior
Cisco WebEx Node for MCS 8.5(5)
Cisco WebEx Node for ASR 1000 Series 15.3(01)S
Later versions of Cisco WebEx products may also be affected.
To exploit the vulnerability, an attacker would likely need access to a trusted, internal network to send crafted HTTP requests to the targeted system. This access requirement may reduce the likelihood of a successful attack.
Customers are advised to review the bug reports in the "Vendor Announcements" section for a current list of affected versions.
Software updates are available for Cisco WebEx Meetings Server; however, at the time this alert was first published, software updates for Cisco WebEx Node for MCS and Cisco WebEx Node for ASR 1000 Series were not available.
Administrators are advised to contact the vendor regarding future updates and releases.
An unauthenticated, remote attacker could exploit this vulnerability to read uninitialized memory on an affected device. Successful exploitation could be used to conduct further attacks.
The vulnerability is due to insufficient validation of crafted HTTP requests by the affected software.
An unauthenticated, remote attacker could exploit this vulnerability by sending a crafted HTTP request to a targeted WebEx node. If successful, the attacker could read uninitialized memory on the targeted device, which could be used to conduct further attacks.
Administrators are advised to apply the appropriate updates.
Administrators are advised to allow only trusted users to have network access.
Administrators may consider using IP-based access control lists (ACLs) to allow only trusted systems to access the affected systems.
Administrators are advised to monitor affected systems.
Cisco customers with active contracts should contact their Cisco support team for assistance in upgrading to a software version that includes fixes for this vulnerability. Cisco customers without contracts may contact the Cisco Technical Assistance Center at 1-800-553-2447 or 1-408-526-7209 or via e-mail at firstname.lastname@example.org for assistance.
The security vulnerability applies to the following combinations of products.
Cisco WebEx Meetings Server
1.0 Base | 1.1 Base
Cisco WebEx Node for ASR 1000 Series
15.3 Base, (01)S
Cisco WebEx Node for MCS
The urgency and severity ratings of this alert are not tailored to individual users; users may value alerts differently based upon their network configurations and circumstances. THE ALERT, AND INFORMATION CONTAINED THEREIN, ARE PROVIDED ON AN "AS IS" BASIS AND DO NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE ALERT, AND INFORMATION CONTAINED THEREIN, OR MATERIALS LINKED FROM THE ALERT, IS AT YOUR OWN RISK. INFORMATION IN THIS ALERT AND ANY RELATED COMMUNICATIONS IS BASED ON OUR KNOWLEDGE AT THE TIME OF PUBLICATION AND IS SUBJECT TO CHANGE WITHOUT NOTICE. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE ALERTS AT ANY TIME.