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Multiple buffer overflows in Mozilla POP3 protocol handler

Vulnerability Note VU#125776

Original Release Date: 2004-09-17 | Last Revised: 2004-09-17


There are multiple buffer overflow vulnerabilities in the Mozilla POP3 protocol handler that could allow a remote attacker to execute arbitrary code.


Post Office Protocol Version 3 (POP3) is a mail protocol that provides a means for retrieving email from a remote server. The Mozilla mail client supports the POP3 protocol. There are multiple vulnerabilities in a number of functions used by the Mozilla POP3 protocol handler. The vulnerable functions include: FreeMsgInfo(), GetXtndXlstMsgid(), GetUidlList(), and GetList(). When processing POP3 responses, a specially crafted response could trigger a buffer overflow condition.


By sending a specially crafted POP3 response to an affected client, a remote attacker could cause the client to crash or potentially execute arbitrary code. Exploitation of this vulnerability would require a user to connect to a malicious POP3 server.



Upgrade as specified by your vendor. This issue has been resolved in Mozilla 1.7.3, Firefox Preview Release, and Thunderbird 0.8.

Vendor Information


Mozilla Affected

Updated:  September 16, 2004



Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.


The CERT/CC has no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

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This vulnerability was reported by Gael Delalleau.

This document was written by Damon Morda.

Other Information

CVE IDs: None
Severity Metric: 28.69
Date Public: 2004-05-29
Date First Published: 2004-09-17
Date Last Updated: 2004-09-17 18:07 UTC
Document Revision: 13

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