Description
An issue was discovered in Dovecot before 2.3.13. By using IMAP IDLE, an authenticated attacker can trigger unhibernation via attacker-controlled parameters, leading to access to other users' email messages (and path disclosure).
References (9)
Core 9
Core References
Vendor Advisory x_refsource_misc
https://dovecot.org/security
Mailing List, Third Party Advisory x_refsource_confirm
http://www.openwall.com/lists/oss-security/2021/01/04/4
Mailing List, Vendor Advisory x_refsource_confirm
https://dovecot.org/pipermail/dovecot-news/2021-January/000450.html
Vendor Advisory x_refsource_misc
https://doc.dovecot.org/configuration_manual/hibernation/
Third Party Advisory vendor-advisory
x_refsource_debian
https://www.debian.org/security/2021/dsa-4825
Mailing List, Third Party Advisory mailing-list
x_refsource_fulldisc
http://seclists.org/fulldisclosure/2021/Jan/18
Mailing List, Third Party Advisory, VDB Entry x_refsource_misc
http://packetstormsecurity.com/files/160842/Dovecot-2.3.11.3-Access-Bypass.html
Third Party Advisory vendor-advisory
x_refsource_gentoo
https://security.gentoo.org/glsa/202101-01
Mailing List, Third Party Advisory vendor-advisory
x_refsource_fedora
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GXDKFLOCUP7I4ELGQ2F4P5TGC6NXMYV7/
Scores
CVSS v3
6.8
EPSS
0.0275
EPSS Percentile
84.6%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
Details
Status
published
Products (3)
debian/debian_linux
10.0
dovecot/dovecot
2.2.26 - 2.3.13
fedoraproject/fedora
32
Published
Jan 04, 2021
Tracked Since
Feb 18, 2026