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).
https://www.debian.org/security/2021/dsa-4825
https://security.gentoo.org/glsa/202101-01
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GXDKFLOCUP7I4ELGQ2F4P5TGC6NXMYV7/
http://www.openwall.com/lists/oss-security/2021/01/04/4
http://seclists.org/fulldisclosure/2021/Jan/18
http://packetstormsecurity.com/files/160842/Dovecot-2.3.11.3-Access-Bypass.html
https://dovecot.org/security
https://dovecot.org/pipermail/dovecot-news/2021-January/000450.html
https://doc.dovecot.org/configuration_manual/hibernation/
Source: Mitre, NVD
Published: 2021-01-04
Updated: 2023-11-07
Base Score: 4.9
Vector: CVSS2#AV:N/AC:M/Au:S/C:P/I:P/A:N
Severity: Medium
Base Score: 6.8
Vector: CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
EPSS: 0.01066