Ubuntu Security Notice USN-387-1
28th November, 2006
dovecot vulnerability
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 6.10
- Ubuntu 6.06 LTS
Details
Dovecot was discovered to have an error when handling its index cache
files. This error could be exploited by authenticated POP and IMAP
users to cause a crash of the Dovecot server, or possibly to execute
arbitrary code. Only servers using the non-default option
"mmap_disable=yes" were vulnerable.
Update instructions
The problem can be corrected by updating your system to the following package version:
- Ubuntu 6.10:
- dovecot-common 1.0.rc2-1ubuntu2.1
- Ubuntu 6.06 LTS:
- dovecot-common 1.0.beta3-3ubuntu5.4
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.