It was discovered that the IMAP code in the Evolution Data Server performs insufficient sanitising of a value later used an array index, which can lead to the execution of arbitrary code.
For the oldstable distribution (sarge) a different source package is affected and will be fixed separately.
For the stable distribution (etch) this problem has been fixed in version 1.6.3-5etch1.
For the unstable distribution (sid) this problem has been fixed in version 1.10.2-2.
We recommend that you upgrade your evolution-data-server packages.
MD5 checksums of the listed files are available in the original advisory.