dovecot: Improper certificate validation
Published Mar 27, 2019
7.7
HIGHCVSS 3.0
EPSS 2.42%
Description
It was discovered that Dovecot before versions 2.2.36.1 and 2.3.4.1 incorrectly handled client certificates. A remote attacker in possession of a valid certificate with an empty username field could possibly use this issue to impersonate other users.
Affected products
-
- Version 2.2.36.1StatusaffectedConstraints-
- Version 2.3.4.1StatusaffectedConstraints-
- Version
Configuration 1
Configuration 2
- 12.04
- 14.04
- 16.04
- 18.04
- 18.10
No data.
Red Hat Enterprise Linux 7
dovecot-1:2.2.36-6.el7
Fixed · RHSA-2020:1062
Red Hat Enterprise Linux 8
dovecot-1:2.2.36-10.el8
Fixed · RHSA-2019:3467
Red Hat Enterprise Linux 5
dovecot
Will not fix
Red Hat Enterprise Linux 6
dovecot
Will not fix
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 7 | dovecot-1:2.2.36-6.el7 | Fixed | RHSA-2020:1062 |
| Red Hat Enterprise Linux 8 | dovecot-1:2.2.36-10.el8 | Fixed | RHSA-2019:3467 |
| Red Hat Enterprise Linux 5 | dovecot | Will not fix | n/a |
| Red Hat Enterprise Linux 6 | dovecot | Will not fix | n/a |
No package ranges for this CVE.
Remediation
Red Hat mitigation
Attack can be migitated by having the certificates with proper Extended Key Usage, such as 'TLS Web Server' and 'TLS Web Server Client'. Also client-side certification authentication can be turned off using: auth_ssl_require_client_cert = no auth_ssl_username_from_cert = no
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
1 other source (Red Hat) ▾
CVSS:3.0/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:N
AV:N/AC:M/Au:S/C:P/I:P/A:N
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 2, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
- EPSS v4
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
- EPSS v4
Table of values (17 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 2, 2026 | 2.42% (0.02417) | 83.57th | v5 (v2026.06.15) |
| Jun 15, 2026 | 2.46% (0.02462) | 82.30th | v5 (v2026.06.15) |
| Apr 19, 2026 | 1.57% (0.01572) | 81.57th | v4 (v2025.03.14) |
| Mar 30, 2025 | 0.29% (0.00293) | 49.70th | v4 (v2025.03.14) |
| Mar 29, 2025 | 1.44% (0.01436) | 68.73th | v4 (v2025.03.14) |
| Mar 17, 2025 | 0.25% (0.00251) | 46.52th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.29% (0.00289) | 69.81th | v3 (v2023.03.01) |
| Mar 20, 2024 | 0.24% (0.00240) | 61.30th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.27% (0.00271) | 66.95th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.27% (0.00274) | 62.99th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.23% (0.01232) | 67.28th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.23% (0.01232) | 64.85th | v2 (v2022.01.01) |
| Feb 4, 2022 | 24.28% (0.24280) | 95.19th | v2 (v2022.01.01) |
| Feb 3, 2022 | 8.70% (0.08700) | 85.97th | v1 |
| Jan 6, 2022 | 8.70% (0.08700) | 85.81th | v1 |
| Jan 5, 2022 | 2.08% (0.02080) | 78.06th | v5 (v2026.06.15) |
| Apr 14, 2021 | 2.08% (0.02080) | 0.00th | v1 |
References (11)
- http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00067.html vendor-advisoryx_refsource_SUSEMailing ListThird Party Advisory
- https://access.redhat.com/errata/RHSA-2019:3467 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/security/cve/CVE-2019-3814 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1673415 Issue Tracking
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3814 x_refsource_CONFIRMIssue TrackingRelease NotesThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4XLI55NGRDTGMVOPYFCPPFNPA5VKYSSY/ vendor-advisoryx_refsource_FEDORA
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QHFZ5OWRIZGIWZJ5PTNVWWZNLLNH4XYS/ vendor-advisoryx_refsource_FEDORA
- https://nvd.nist.gov/vuln/detail/CVE-2019-3814
- https://security.gentoo.org/glsa/201904-19 vendor-advisoryx_refsource_GENTOO
- https://www.cve.org/CVERecord?id=CVE-2019-3814
- https://www.dovecot.org/list/dovecot/2019-February/114575.html x_refsource_MISCExploitMailing ListVendor Advisory
Change history (0)
No recorded changes yet.