Dovecot mail_extra_groups option unauthorized access
| dovecot-mailextragroups-unauth-access (41009) |  Medium Risk |
Description:
Dovecot could allow a local attacker to gain unauthorized access on the system, caused by an error when the mail_extra_groups option is enabled. By creating a symlink, an attacker could read, modify, and delete arbitrary files that have mail group permissions set.
*CVSS:
| Base Score: | 3.3 |
| Access Vector: | Local |
| Access Complexity: | Medium |
| Authentication: | None |
| Confidentiality Impact: | Partial |
| Integrity Impact: | Partial |
| Availability Impact: | None |
| Temporal Score: | 2.4 |
| Exploitability: | Unproven |
| Remediation Level: | Official-Fix |
| Report Confidence: | Confirmed |
Consequences:
File Manipulation
Remedy:
Upgrade to the latest version of Dovecot (1.0.11 or later), available from the Dovecot Web site. See References.
References:
- BugTraq Mailing List, Tue Mar 04 2008 - 00:47:53 CST: Dovecot mail_extra_groups setting is often used insecurely.
- Dovecot Changelog, Tue Mar 4 08:37:56 EET 2008: [Dovecot-news] v1.0.11 released.
- Dovecot Web site: Dovecot.
- BID-28092: Dovecot 'mail_extra_groups' Insecure Settings Local Unauthorized Access Vulnerability
- CVE-2008-1199: Dovecot before 1.0.11, when configured to use mail_extra_groups to allow Dovecot to create dotlocks in /var/mail, might allow local users to read sensitive mail files for other users, or modify files or directories that are writable by group, via a symlink attack.
- DSA-1516: dovecot -- privilege escalation
- GLSA-200803-25: Dovecot: Multiple vulnerabilities
- RHSA-2008-0297: Low: dovecot security and bug fix update
- SUSE-SR:2008:020: SUSE Security Summary Report
- USN-593-1: Dovecot vulnerabilities
Platforms Affected:
- Canonical Ubuntu 6.06 LTS
- Canonical Ubuntu 6.10
- Canonical Ubuntu 7.04
- Canonical Ubuntu 7.10
- Debian Debian Linux 4.0
- Dovecot Dovecot prior to 1.0.11
- Gentoo Linux
- RedHat Enterprise Linux 5
- RedHat Enterprise Linux 5 Client Workstation
Reported:
Mar 04, 2008
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The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall IBM be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.