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rset
2010 Feb 27
2
Possible CPU Denial-Of-Service attack to dovecot IMAP.
...:
-- slackware 11.0, x86_32
-- linux 2.6.31.6
-- dovecot 1.2.10
-- mailbox(not maildir) via NFS storage.
Details:
1. Buggy message 1219733 byte size. And most of this size is mail header.
2. Mail header mostly consists of a repeating block:
---
[...]
MIME-Version: 1.0
Content-type: text/plain; charset=windows-1251
Content-transfer-encoding: 8bit
Date: Thu, 25 Feb 2010 11:13:03 +0300
X-Priority: 0
X-MSMail-Priority: Normal
X-Mailer: Microsoft Office Outlook, Build 11.0.5510
X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1441
X-Sender: torrents at rutracker.org
Reply-to: torrents at rutrack...