An issue was discovered in Cyrus IMAP before 2.5.15, 3.0.x before 3.0.13, and 3.1.x through 3.1.8. If sieve script uploading is allowed (3.x) or certain non-default sieve options are enabled (2.x), a user with a mail account on the service can use a sieve script containing a fileinto directive to create any mailbox with administrator privileges, because of folder mishandling in autosieve_createfolder() in imap/lmtp_sieve.c.
Weakness
The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Imap | Cyrus | 2.5.0 (including) | 2.5.15 (excluding) |
| Imap | Cyrus | 3.0.0 (including) | 3.0.13 (excluding) |
| Imap | Cyrus | 3.1.0 (including) | 3.1.8 (excluding) |
| Red Hat Enterprise Linux 8 | RedHat | cyrus-imapd-0:3.0.7-19.el8 | * |
| Cyrus-imapd | Ubuntu | bionic | * |
| Cyrus-imapd | Ubuntu | disco | * |
| Cyrus-imapd | Ubuntu | eoan | * |
| Cyrus-imapd | Ubuntu | esm-apps/bionic | * |
| Cyrus-imapd | Ubuntu | trusty | * |
| Cyrus-imapd | Ubuntu | upstream | * |
Potential Mitigations
Related Attack Patterns
- https://cwe.mitre.org/data/definitions/122.html
- https://cwe.mitre.org/data/definitions/233.html
- https://cwe.mitre.org/data/definitions/58.html
References
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2DIV4HQ6LG5GPRO4B5Z2NHCZUPBUVVVF/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6IGOO5UGEBBDPN7B2YXLK7I7L3Y35EBA/
- https://seclists.org/bugtraq/2019/Dec/38
- https://security.gentoo.org/glsa/202006-23
- https://usn.ubuntu.com/4566-1/
- https://www.cyrusimap.org/imap/download/release-notes/2.5/x/2.5.15.html
- https://www.cyrusimap.org/imap/download/release-notes/3.0/x/3.0.13.html
- https://www.debian.org/security/2019/dsa-4590
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2DIV4HQ6LG5GPRO4B5Z2NHCZUPBUVVVF/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6IGOO5UGEBBDPN7B2YXLK7I7L3Y35EBA/
- https://seclists.org/bugtraq/2019/Dec/38
- https://security.gentoo.org/glsa/202006-23
- https://usn.ubuntu.com/4566-1/
- https://www.cyrusimap.org/imap/download/release-notes/2.5/x/2.5.15.html
- https://www.cyrusimap.org/imap/download/release-notes/3.0/x/3.0.13.html
- https://www.debian.org/security/2019/dsa-4590