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CVE-2011-3253

Status Candidate

Overview

CalDAV in Apple iOS before 5 does not validate X.509 certificates for SSL sessions, which allows man-in-the-middle attackers to spoof calendar servers and obtain sensitive information via an arbitrary certificate.

Related Files

CalDAV SSL Certificate Validation
Posted Oct 13, 2011
Authored by Knud | Site nsense.fi

nSense Vulnerability Research Security Advisory - The calendar synchronization feature of iOS fails to validate the SSL certificate provided by the server. Therefore, CalDAV communication can be intercepted by a basic man in the middle attack. As every request contains a HTTP basic authentication header, which contains base64-encoded credentials, it is possible to intercept email account credentials by an attacker that is suitably positioned (e.g. the same LAN, WLAN) or is able to tamper with DNS records pointing to the CalDAV server. The application accepts the untrusted certificate without any warning or prompt, so the attack will go unnoticed by the user.

tags | advisory, web
systems | cisco
advisories | CVE-2011-3253
SHA-256 | 1287538d9d82e32529c0d747e336f8c5ebf4984b6eb88af17ffa07e9b262328d
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