CVE-2009-0143 in iTunes
Summary
by MITRE
Apple iTunes before 8.1 does not properly inform the user about the origin of an authentication request, which makes it easier for remote podcast servers to trick a user into providing a username and password when subscribing to a crafted podcast.
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Analysis
by VulDB Data Team • 08/30/2019
The vulnerability described in CVE-2009-0143 represents a significant user interface deception flaw within Apple iTunes version 8.0 and earlier. This issue stems from the application's failure to adequately communicate the true source of authentication requests to users during podcast subscription processes. The weakness specifically affects the user authentication mechanism when users attempt to subscribe to podcasts hosted on remote servers, creating an environment where malicious actors can exploit user trust and potentially harvest credentials through social engineering techniques.
The technical flaw manifests in iTunes' insufficient validation and presentation of authentication request origins. When users encounter a podcast subscription request that requires authentication, the application fails to clearly indicate which server is requesting credentials. This lack of transparency creates an opportunity for attackers to host malicious podcast feeds that appear to originate from legitimate sources. The vulnerability operates at the user interaction level rather than through direct code execution or network protocol flaws, making it particularly insidious as it relies on human factors rather than technical vulnerabilities.
From an operational impact perspective, this vulnerability enables credential harvesting attacks where remote podcast servers can deceive users into providing their authentication credentials for legitimate services. The attack vector specifically targets podcast subscription workflows, which are commonly used for distributing content and may involve users authenticating to various services. This creates a potential for credential theft across multiple service providers, especially when users employ the same credentials for different systems. The vulnerability essentially allows for phishing attacks that masquerade as legitimate podcast subscription processes, potentially leading to unauthorized access to user accounts and associated data.
The security implications extend beyond simple credential theft, as this vulnerability aligns with techniques described in the ATT&CK framework under credential access and social engineering tactics. It demonstrates how user interface design flaws can create exploitable conditions for man-in-the-middle attacks and credential harvesting operations. The vulnerability also relates to CWE-602, which addresses client-side input validation issues where applications fail to properly validate or display information about external requests. This weakness particularly affects the trust model of the application, undermining user confidence in the authentication process and potentially enabling broader compromise scenarios.
Mitigation strategies for this vulnerability primarily involve updating to iTunes version 8.1 or later, where Apple implemented proper origin validation for authentication requests. Users should also maintain awareness of the subscription sources and verify the legitimacy of podcast feeds before providing authentication credentials. Security best practices recommend implementing multi-factor authentication for services that users access through podcast subscription workflows, as well as regular security awareness training to help users recognize potential deception attempts. Network administrators should monitor for suspicious podcast feed activities and consider implementing content filtering solutions that can detect and block potentially malicious podcast subscriptions. Additionally, organizations should establish clear policies regarding podcast consumption and authentication practices to reduce the attack surface for such social engineering techniques.