An attacker could send a crafted email message that could disrupt email service.
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.
2 June 2011
A security issue affects these releases of Ubuntu and its derivatives:
An attacker could send a crafted email message that could disrupt email service.
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.
The problem can be corrected by updating your system to the following package versions:
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
In general, a standard system update will make all the necessary changes.
Vulmon