An issue was discovered in Cyrus IMAP before 3.12.4. A JMAP email-header blob ID can reference an out-of-bounds index. An authenticated user could attempt to download a crafted JMAP blob ID of the form H<emailid>-<index>, which could read past the end of the internal blob_headers array during download, exposing adjacent heap memory.
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
|