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640410: CVE-2010-3707 Dovecot: Failed to properly update ACL cache, when multiple rules defined rights for one subject

The MITRE CVE dictionary describes this issue as:

plugins/acl/acl-backend-vfile.c in Dovecot 1.2.x before 1.2.15 and 2.0.x before 2.0.5 interprets an ACL entry as a directive to add to the permissions granted by another ACL entry, instead of a directive to replace the permissions granted by another ACL entry, in certain circumstances involving more specific entries that occur after less specific entries, which allows remote authenticated users to bypass intended access restrictions via a request to read or modify a mailbox.

Find out more about CVE-2010-3707 from the MITRE CVE dictionary dictionary and NIST NVD.


This issue did not affect the version of dovecot package, as shipped with Red
Hat Enterprise Linux 4 and 5. This issue affects the version of dovecot
package as shipped with Red Hat Enterprise Linux 6. The Red Hat Security
Response Team has rated this issue as having low security impact, a future
update may address this flaw.

CVSS v2 metrics

NOTE: The following CVSS v2 metrics and score provided are preliminary and subject to review.

Base Score 5.5
Base Metrics AV:N/AC:L/Au:S/C:P/I:P/A:N
Access Vector Network
Access Complexity Low
Authentication Single
Confidentiality Impact Partial
Integrity Impact Partial
Availability Impact None

Find out more about Red Hat support for the Common Vulnerability Scoring System (CVSS).

Red Hat Security Errata

Platform Errata Release Date
Red Hat Enterprise Linux 6 (dovecot) RHSA-2011:0600 2011-05-19

Affected Packages State

Platform Package State
Red Hat Enterprise Linux 5 dovecot Not affected
Red Hat Enterprise Linux 4 dovecot Not affected

Last Modified