Ubuntu 8.04 LTS / 8.10 / 9.04 : dovecot vulnerabilities (USN-838-1)

High Nessus Plugin ID 41940


The remote Ubuntu host is missing one or more security-related patches.


It 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.


Update the affected packages.

Plugin Details

Severity: High

ID: 41940

File Name: ubuntu_USN-838-1.nasl

Version: $Revision: 1.12 $

Type: local

Agent: unix

Published: 2009/09/29

Modified: 2016/12/01

Dependencies: 12634

Risk Information

Risk Factor: High


Base Score: 7.5

Temporal Score: 6.5

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P

Temporal Vector: CVSS2#E:ND/RL:OF/RC:C

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:dovecot-common, p-cpe:/a:canonical:ubuntu_linux:dovecot-dev, p-cpe:/a:canonical:ubuntu_linux:dovecot-imapd, p-cpe:/a:canonical:ubuntu_linux:dovecot-pop3d, p-cpe:/a:canonical:ubuntu_linux:dovecot-postfix, cpe:/o:canonical:ubuntu_linux:8.04:-:lts, cpe:/o:canonical:ubuntu_linux:8.10, cpe:/o:canonical:ubuntu_linux:9.04

Required KB Items: Host/cpu, Host/Ubuntu, Host/Ubuntu/release, Host/Debian/dpkg-l

Exploit Available: false

Exploit Ease: No known exploits are available

Patch Publication Date: 2009/09/28

Reference Information

CVE: CVE-2008-4577, CVE-2008-5301, CVE-2009-2632, CVE-2009-3235

BID: 31587, 36377

OSVDB: 49098, 49918, 57843, 58103

USN: 838-1

CWE: 22, 119, 264