An issue was discovered in Cyrus IMAP before 3.12.4. CalDAV/CardDAV multiget bypasses a per-href ACL. An authenticated DAV user with some shared access to another user's calendar or address book could read even unshared events or contacts by including the target hrefs in a calendar-multiget or addressbook-multiget REPORT.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
High
Difficult to exploit
Privileges Required
Low
Basic privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
Low
Partial data leak
Integrity
None
No data modification
Availability
None
No disruption
CVSS Vector v3.1
Weakness Type (CWE)
Vulnerable Products 3
| Configuration | From (including) | Up to (excluding) |
|---|---|---|
|
Cyrusimap Cyrus_Imap
cpe:2.3:a:cyrusimap:cyrus_imap:*:*:*:*:*:*:*:*
|
— |
3.8.8
|
|
Cyrusimap Cyrus_Imap
cpe:2.3:a:cyrusimap:cyrus_imap:*:*:*:*:*:*:*:*
|
3.9.0
|
3.10.4
|
|
Cyrusimap Cyrus_Imap
cpe:2.3:a:cyrusimap:cyrus_imap:*:*:*:*:*:*:*:*
|
3.11.0
|
3.12.4
|