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CVE-2010-3706

Status Candidate

Overview

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 the private namespace of a user, which allows remote authenticated users to bypass intended access restrictions via a request to read or modify a mailbox.

Related Files

Ubuntu Security Notice USN-1059-1
Posted Feb 7, 2011
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 1059-1 - It was discovered that the ACL plugin in Dovecot would incorrectly propagate ACLs to new mailboxes. A remote authenticated user could possibly read new mailboxes that were created with the wrong ACL. It was discovered that the ACL plugin in Dovecot would incorrectly merge ACLs in certain circumstances. A remote authenticated user could possibly bypass intended access restrictions and gain access to mailboxes. It was discovered that the ACL plugin in Dovecot would incorrectly grant the admin permission to owners of certain mailboxes. A remote authenticated user could possibly bypass intended access restrictions and gain access to mailboxes. It was discovered that Dovecot incorrectly handled the simultaneous disconnect of a large number of sessions. A remote authenticated user could use this flaw to cause Dovecot to crash, resulting in a denial of service.

tags | advisory, remote, denial of service
systems | linux, ubuntu
advisories | CVE-2010-3304, CVE-2010-3706, CVE-2010-3707, CVE-2010-3779, CVE-2010-3780
SHA-256 | a9cd8538ef52a541d5a2d100ec3dd1ab0318a97ae7b3ffe3845a728cd6313b0f
Mandriva Linux Security Advisory 2010-217
Posted Nov 2, 2010
Authored by Mandriva | Site mandriva.com

Mandriva Linux Security Advisory 2010-217 - Dovecot 1.2.x before 1.2.15 and 2.0.x before 2.0.beta2 grants the admin permission to the owner of each mailbox in a non-public namespace, which might allow remote authenticated users to bypass intended access restrictions by changing the ACL of a mailbox, as demonstrated by a symlinked shared mailbox. Dovecot 1.2.x before 1.2.15 allows remote authenticated users to cause a denial of service by simultaneously disconnecting many POP3 sessions. Various other issues have also been addressed.

tags | advisory, remote, denial of service
systems | linux, mandriva
advisories | CVE-2010-3779, CVE-2010-3780, CVE-2010-3304, CVE-2010-3706, CVE-2010-3707
SHA-256 | 595ff091e6aa58234bddf6c637804c9a21aa3bffabdfb1bf41b586ca1b7c28a7
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