Ubuntu 8.04 LTS / 8.10 / 9.04 : dovecot vulnerabilities (USN-838-1)
High Nessus Plugin ID 41940
SynopsisThe remote Ubuntu host is missing one or more security-related patches.
DescriptionIt was discovered that the ACL plugin in Dovecot would incorrectly handle negative access rights. An attacker could exploit this flaw to access the Dovecot server, bypassing the intended access restrictions.
This only affected Ubuntu 8.04 LTS. (CVE-2008-4577)
It was discovered that the ManageSieve service in Dovecot incorrectly handled '..' in script names. A remote attacker could exploit this to read and modify arbitrary sieve files on the server. This only affected Ubuntu 8.10. (CVE-2008-5301)
It was discovered that the Sieve plugin in Dovecot incorrectly handled certain sieve scripts. An authenticated user could exploit this with a crafted sieve script to cause a denial of service or possibly execute arbitrary code. (CVE-2009-2632, CVE-2009-3235).
Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
SolutionUpdate the affected packages.