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Ubuntu 11.04 USN-1143-1 Critical: Dovecot Denial of Service Issue

An attacker could send a crafted email message that could disrupt emailservice.. =========================================================================Ubuntu Security Notice USN-1143-1 June 02, 2011 dovecot vulnerability ========================================================================= A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 11.04 - Ubuntu 10.10 - Ubuntu 10.04 LTS Summary: An attacker could send a crafted email message that could disrupt email service. Software Description: - 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. Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 11.04: dovecot-common 1:1.2.15-3ubuntu2.1 Ubuntu 10.10: dovecot-common 1:1.2.12-1ubuntu8.2 Ubuntu 10.04 LTS: dovecot-common 1:1.2.9-1ubuntu6.4 In general, a standard system update will make all the necessary changes. References: CVE-2011-1929 Package Information: https://launchpad.net/ubuntu/+source/dovecot/1:1.2.15-3ubuntu2.1 https://launchpad.net/ubuntu/+source/dovecot/1:1.2.12-1ubuntu8.2 https://launchpad.net/ubuntu/+source/dovecot/1:1.2.9-1ubuntu6.4 . An intruder might compromise messaging systems via specially designed emails aimed at Postfix. Critical patches now accessible.. Dovecot Email Disruption, Ubuntu Security Notice, Denial of Service Risk, Email Server Update. . Severity: Critical. LinuxSecurity.com Team

Jun 02, 2011 •Critical Ubuntu