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Vulnerability record · CVE-2002-2338 · published 31 December 2002

CVE-2002-2338: Mozilla improper input validation vulnerability

Mozilla · Mozilla

The POP3 mail client in Mozilla 1.0 and earlier, and Netscape Communicator 4.7 and earlier, allows remote attackers to cause a denial of service (no new mail) via a mail message containing a dot (.) at a newline, which is interpreted as the end of the message.

5.0 CVSS 2.0 Medium EPSS 3.9% · top 10.1% CWE-20 · Improper input validation
5.0CVSS 2.0 base score
3.9%EPSS exploitation probability, 30 days
NoNot in CISA KEV
3Affected product versions listed by NVD
14References, 2 tagged exploit
16 Jun 2026Last modified by NVD

Description

The POP3 mail client in Mozilla 1.0 and earlier, and Netscape Communicator 4.7 and earlier, allows remote attackers to cause a denial of service (no new mail) via a mail message containing a dot (.) at a newline, which is interpreted as the end of the message.

AV:N/AC:L/Au:N/C:N/I:N/A:P

Affected products

3 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://bugzilla.mozilla.org/show_bug.cgi?id=144228
http://mozilla.org/releases/mozilla1.0.1/security-fixes-1.0.1.html
http://online.securityfocus.com/archive/1/276628
http://www.iss.net/security_center/static/9343.php
http://www.mandrakesoft.com/security/advisories?name=MDKSA-2002:074
http://www.securityfocus.com/archive/1/276946
http://www.securityfocus.com/bid/5002 ExploitPatch
http://bugzilla.mozilla.org/show_bug.cgi?id=144228
http://mozilla.org/releases/mozilla1.0.1/security-fixes-1.0.1.html
http://online.securityfocus.com/archive/1/276628
http://www.iss.net/security_center/static/9343.php
http://www.mandrakesoft.com/security/advisories?name=MDKSA-2002:074
http://www.securityfocus.com/archive/1/276946
http://www.securityfocus.com/bid/5002 ExploitPatch

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2002-2338), CISA KEV, FIRST EPSS (scores of 2026-09-29). This page is refreshed as NVD updates the record.