Ubuntu Security Notice USN-567-1
10th January, 2008
dovecot vulnerability
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 7.10
- Ubuntu 7.04
Software description
- dovecot
Details
It was discovered that in very rare configurations using LDAP, Dovecot may
reuse cached connections for users with the same password. As a result,
a user may be able to login as another if the connection is reused.
The default Ubuntu configuration of Dovecot was not vulnerable.
Update instructions
The problem can be corrected by updating your system to the following package version:
- Ubuntu 7.10:
- dovecot-pop3d 1:1.0.5-1ubuntu2.1
- dovecot-imapd 1:1.0.5-1ubuntu2.1
- Ubuntu 7.04:
- dovecot-pop3d 1.0.rc17-1ubuntu2.2
- dovecot-imapd 1.0.rc17-1ubuntu2.2
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
In general, a standard system upgrade is sufficient to effect the
necessary changes.