Vulnerability in Dovecot
CVE-2020-24386
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).
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.8 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.028 (85.6th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 86th percentile — 85.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.028 · newest: 0.028 · change: 0.000
Affected products
- Dovecot
- Debian Linux — versions 10.0
- Fedoraproject Fedora — versions 32
Public proof-of-concept exploits
References
- dovecot.org/security (Vendor Advisory)
- www.openwall.com/lists/oss-security/2021/01/04/4 (Mailing List, Third Party Advisory)
- dovecot.org/pipermail/dovecot-news/2021-January/000450.html (Mailing List, Vendor Advisory)
- doc.dovecot.org/configuration_manual/hibernation/ (Vendor Advisory)
- www.debian.org/security/2021/dsa-4825 (vendor-advisory, Third Party Advisory)
- seclists.org/fulldisclosure/2021/Jan/18 (mailing-list, Mailing List, Third Party Advisory)
- packetstormsecurity.com/files/160842/Dovecot-2.3.11.3-Access-Bypass.html (Mailing List, VDB Entry, Third Party Advisory)
- security.gentoo.org/glsa/202101-01 (vendor-advisory, Third Party Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
Frequently asked questions
- What is CVE-2020-24386?
- CVE-2020-24386 is a medium-severity vulnerability in Dovecot. CVSS score: 6.8/10. Published 2021-01-04.
- How severe is CVE-2020-24386?
- Medium severity. CVSS v3 base score is 6.8 out of 10.
- Is CVE-2020-24386 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.