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USN-1143-1: Dovecot vulnerability

2 June 2011

An attacker could send a crafted email message that could disrupt email service.

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Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

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Releases

Packages

  • dovecot - IMAP and POP3 email server

Details

It was discovered that the message header parser in Dovecot did not
properly handle '\0' characters in header names. This could allow a
remote attacker to cause a denial of service through a crafted email
message by crashing the Dovecot daemon or corrupting mailboxes.

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Learn more about Ubuntu Pro

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 11.04
Ubuntu 10.10
Ubuntu 10.04

In general, a standard system update will make all the necessary changes.

References