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4.3

iPhone Safari can freeze from many alerts

CVE-2015-3763 · published 11 years ago
Summary

The Safari browser on iPhone devices running iOS versions before 8.4.1 can be overwhelmed by a large number of pop‑up messages. A malicious website could cause the browser to become unresponsive, effectively locking the user out. Update the iPhone to iOS 8.4.1 or later to stop this behavior.

What to do

The CVE record does not list a fixed version. Check the vendor's site or the advisory links below - a fix may already be released.

Affected software
VendorProductAffected versions
apple iphone_os <= 8.4
cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*
Original advisory text
Safari in Apple iOS before 8.4.1 does not limit the rate of JavaScript alert messages, which allows remote attackers to cause a denial of service (apparent browser locking) via a crafted web site.
Safari in Apple iOS before 8.4.1 does not limit the rate of JavaScript alert messages, which allows remote attackers to cause a denial of service (apparent browser locking) via a crafted web site.
References
Fix within
Internet-facing 60 days
Internal At next upgrade
  • Not known to be exploited
  • Needs hands-on effort to exploit (estimated)
  • Gives an attacker partial control (estimated)
Severity
4.3 Medium
Exploitation
1% chance of attack within 30 days
Type
CWE-19Data Processing Errors
Timeline
Published16 Aug 2015
Updated31 Oct 2026
First seen29 Sep 2026
Sources
CVE-2015-3763 · NVD
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