The UIKit Alerts component in Apple iOS before 5 allows remote attackers to cause a denial of service (device hang) via a long tel: URL that triggers a large size for the acceptance dialog.
CVSS Severity (version 2.0):
Impact Subscore: 2.9
Exploitability Subscore: 10.0
CVSS Version 2 Metrics:
Access Vector: Network exploitable
Access Complexity: Low
Authentication: Not required to exploit
Impact Type: Allows disruption of service
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