Apple has released an additional security advisory and updated software to address the multiple Apple products connection validation security bypass vulnerability.
A vulnerability in multiple Apple products could allow an unauthenticated, remote attacker to conduct man-in-the-middle attacks.
The vulnerability exists because the affected products improperly validate secure transport for the authenticity of the connection. An attacker could exploit the vulnerability by providing crafted certificates to the targeted user and may conduct spoofing and man-in-the-middle attacks to obtain sensitive information from the user.
Apple has confirmed the vulnerability and software updates are available.
The following Apple products are vulnerable:
Apple iOS versions prior to 6.1.6
Apple iOS versions prior to 7.0.6
Apple TV versions prior to 6.0.2
To exploit the vulnerability, the attacker may provide a link to the targeted user and convince the user to follow the link by using misleading language and instructions.
An unauthenticated, remote attacker could exploit the vulnerability to bypass the security transportation authentication implementation steps and could spoof communication with the targeted user to conduct man-in-the-middle attacks. The attacker could access sensitive user information.
The vulnerability is in the Secure Transport feature
in the Data Security component of the affected software due to improper validation of authenticity of the transport channel.
An attacker could exploit the vulnerability by providing a certificate with a crafted signature in a TLS Server Key Exchange message. The attacker could also omit the signing step and cause the affected system to process the spoofed certificate without a valid signature.
This could allow the attacker to spoof a valid server and cause the targeted system to initiate insecure sessions over the TLS channels. This could allow the attacker to conduct man-in-the-middle attacks.
Administrators are advised to apply the appropriate updates.
Administrators are advised to allow only trusted users to have network access.
Users should verify that unsolicited links are safe to follow.
Apple has released updated software at the following links:
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.