Vulnerability · Published Jan 4, 2021 · Assigned by mitre
CVE-2020-24386
Medium 6.8
In plain English
A medium-severity security flaw in the dovecot package (AlmaLinux). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 2.8% (higher than 86% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)6.8Medium
Exploit odds (30 days)2.8%top 13.5% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official 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).
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux:8 | dovecot | 1:2.3.8-9.el8 | ALSA-2021:1887 |
| AlmaLinux:8 | dovecot-devel | 1:2.3.8-9.el8 | ALSA-2021:1887 |
| AlmaLinux:8 | dovecot-mysql | 1:2.3.8-9.el8 | ALSA-2021:1887 |
| AlmaLinux:8 | dovecot-pgsql | 1:2.3.8-9.el8 | ALSA-2021:1887 |
| AlmaLinux:8 | dovecot-pigeonhole | 1:2.3.8-9.el8 | ALSA-2021:1887 |
| Alpine:v3.20 | dovecot | 2.3.13-r0 | ALPINE-CVE-2020-24386 |
| Alpine:v3.21 | dovecot | 2.3.13-r0 | ALPINE-CVE-2020-24386 |
| Alpine:v3.22 | dovecot | 2.3.13-r0 | ALPINE-CVE-2020-24386 |
| Alpine:v3.23 | dovecot | 2.3.13-r0 | ALPINE-CVE-2020-24386 |
| Alpine:v3.24 | dovecot | 2.3.13-r0 | ALPINE-CVE-2020-24386 |
| Debian:12 | dovecot | 1:2.3.13+dfsg1-1 | DEBIAN-CVE-2020-24386 |
| Debian:13 | dovecot | 1:2.3.13+dfsg1-1 | DEBIAN-CVE-2020-24386 |
| Debian:14 | dovecot | 1:2.3.13+dfsg1-1 | DEBIAN-CVE-2020-24386 |
Affected products (as reported)
References
- https://dovecot.org/security x_refsource_MISC
- http://www.openwall.com/lists/oss-security/2021/01/04/4 x_refsource_CONFIRM
- https://dovecot.org/pipermail/dovecot-news/2021-January/000450.html x_refsource_CONFIRM
- https://doc.dovecot.org/configuration_manual/hibernation/ x_refsource_MISC
- DSA-4825 vendor-advisory, x_refsource_DEBIAN
- 20210106 CVE-2020-24386: IMAP hibernation allows accessing other peoples mail mailing-list, x_refsource_FULLDISC
- http://packetstormsecurity.com/files/160842/Dovecot-2.3.11.3-Access-Bypass.html x_refsource_MISC
- GLSA-202101-01 vendor-advisory, x_refsource_GENTOO
- FEDORA-2021-c90cb486f7 vendor-advisory, x_refsource_FEDORA