Vulnerability CVE-2019-19783
Published: 2019-12-16

Description:
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.

Type:

CWE-20

 (Improper Input Validation)

CVSS2 => (AV:N/AC:M/Au:S/C:N/I:P/A:N)

CVSS Base Score
Impact Subscore
Exploitability Subscore
3.5/10
2.9/10
6.8/10
Exploit range
Attack complexity
Authentication
Remote
Medium
Single time
Confidentiality impact
Integrity impact
Availability impact
None
Partial
None
Affected software
Debian -> Debian linux 
Cyrus -> IMAP 

 References:
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/2DIV4HQ6LG5GPRO4B5Z2NHCZUPBUVVVF/
https://seclists.org/bugtraq/2019/Dec/38
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
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