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10.0

Apple Mac OS Runtime for Java lets site connect anywhere

CVE-2000-0563 · published 26 years ago
Summary

The Java runtime on Mac OS up to version 2.1 can be tricked by a web page to reach any server, bypassing its built‑in security rules. This could allow attackers to steal information or deliver malicious code. Upgrade to a newer Java runtime or disable Java in browsers to protect your systems.

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 mac_os_runtime_for_java <= 2.1
cpe:2.3:a:apple:mac_os_runtime_for_java:*:*:java:*:*:*:*:*
Original advisory text
The URLConnection function in MacOS Runtime Java (MRJ) 2.1 and earlier and the Microsoft virtual machine (VM) for MacOS allows a malicious web site operator to connect to arbitrary hosts using a HT...
The URLConnection function in MacOS Runtime Java (MRJ) 2.1 and earlier and the Microsoft virtual machine (VM) for MacOS allows a malicious web site operator to connect to arbitrary hosts using a HTTP redirection, in violation of the Java security model.
References
Fix within
Internet-facing 3 days
Internal 60 days
  • Not known to be exploited
  • Can be exploited automatically (estimated)
  • Gives an attacker full control (estimated)
Severity
10.0 Critical
Exploitation
3% chance of attack within 30 days
Timeline
Published20 Oct 2000
Updated30 Oct 2026
First seen29 Sep 2026
Sources
CVE-2000-0563 · NVD
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