Information Disclosure Vulnerability in Mailman 2.1.5 Allows Remote Attackers to Determine List Membership

CVE-2005-0080

The 55_options_traceback.dpatch patch for mailman 2.1.5 in Ubuntu 4.10 displays a different error message depending on whether the e-mail address is subscribed to a private list, which allows remote attackers to determine the list membership for a given e-mail address.

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