CVE-2019-19783

MEDIUM

Cyrus IMAP < 2.5.15, 3.0.x < 3.0.13, 3.1.x <= 3.1.8 - Privilege Escalation via Sieve Script Fileinto Directive

Title source: llm
STIX 2.1

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.

References (8)

Core 8
Core References
Patch, Release Notes, Vendor Advisory x_refsource_misc
https://www.cyrusimap.org/imap/download/release-notes/2.5/x/2.5.15.html
Patch, Release Notes, Vendor Advisory x_refsource_misc
https://www.cyrusimap.org/imap/download/release-notes/3.0/x/3.0.13.html
Mailing List, Third Party Advisory mailing-list x_refsource_bugtraq
https://seclists.org/bugtraq/2019/Dec/38
Third Party Advisory vendor-advisory x_refsource_debian
https://www.debian.org/security/2019/dsa-4590
Third Party Advisory vendor-advisory x_refsource_gentoo
https://security.gentoo.org/glsa/202006-23
Third Party Advisory vendor-advisory x_refsource_ubuntu
https://usn.ubuntu.com/4566-1/

Scores

CVSS v3 6.5
EPSS 0.0128
EPSS Percentile 79.8%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

Details

CWE
CWE-269
Status published
Products (6)
canonical/ubuntu_linux 18.04
cyrus/imap 2.5.0 - 2.5.15
debian/debian_linux 9.0
debian/debian_linux 10.0
fedoraproject/fedora 30
fedoraproject/fedora 31
Published Dec 16, 2019
Tracked Since Feb 18, 2026