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7.5

Mozilla 1.0 and Netscape 6 crash from long IRC link

CVE-2002-0593 · published 24 years ago
Summary

A specially crafted IRC link with an overly long channel name can make Mozilla 1.0 (including the release candidate) and Netscape 6 stop working or even run unwanted code. This can be triggered by a remote attacker who can send such a link to a user. Upgrade to a newer version of the browsers or apply any available security updates to protect against this risk.

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
mozilla mozilla 0.9.9
1.0
cpe:2.3:a:mozilla:mozilla:0.9.9:*:*:*:*:*:*:*
netscape communicator 6.1
cpe:2.3:a:netscape:communicator:6.1:*:*:*:*:*:*:*
netscape navigator 6.0
6.01
cpe:2.3:a:netscape:navigator:6.0:*:*:*:*:*:*:*
Original advisory text
Buffer overflow in Netscape 6 and Mozilla 1.0 RC1 and earlier allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via a long channel name in an IRC URI.
Buffer overflow in Netscape 6 and Mozilla 1.0 RC1 and earlier allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via a long channel name in an IRC URI.
References
Fix within
Internet-facing 14 days
Internal 60 days
  • Not known to be exploited
  • Can be exploited automatically (estimated)
  • Gives an attacker partial control (estimated)
Severity
7.5 High
Exploitation
4% chance of attack within 30 days
Timeline
Published18 Jun 2002
Updated4 Nov 2026
First seen29 Sep 2026
Sources
CVE-2002-0593 · NVD
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