CVE-2019-3814
published 2019-03-27CVE-2019-3814: 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…
PriorityP337medium6.8CVSS 3.0
AVNACHPRLUINSUCHIHAN
EPSS
2.42%
82.4th percentile
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
15 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| canonical | ubuntu_linux | — | — |
| canonical | ubuntu_linux | — | — |
| canonical | ubuntu_linux | — | — |
| canonical | ubuntu_linux | — | — |
| canonical | ubuntu_linux | — | — |
| debian | dovecot | < dovecot 1:2.3.4.1-1 (bookworm) | dovecot 1:2.3.4.1-1 (bookworm) |
| dovecot | dovecot | — | — |
| dovecot | dovecot | — | — |
| dovecot | dovecot | >= 0 < 1:2.3.4.1-1 | 1:2.3.4.1-1 |
| dovecot | dovecot | >= 0 < 1:2.3.4.1-1 | 1:2.3.4.1-1 |
| dovecot | dovecot | >= 0 < 1:2.3.4.1-1 | 1:2.3.4.1-1 |
| dovecot | dovecot | >= 0 < 1:2.3.4.1-1 | 1:2.3.4.1-1 |
| dovecot | dovecot | >= 1.1.0 < 2.2.36.1 | 2.2.36.1 |
| dovecot | dovecot | >= 2.3.0 < 2.3.4.1 | 2.3.4.1 |
| opensuse | leap | — | — |
CVSS provenance
nvdv3.06.8MEDIUMCVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
nvdv2.04.9MEDIUMAV:N/AC:M/Au:S/C:P/I:P/A:N
osv6.8MEDIUM
vendor_debian7.7HIGH
vendor_redhat7.7HIGH
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Ubuntu
Dovecot vulnerability
vendor_ubuntu·2019-02-05
CVE-2019-3814 Dovecot vulnerability
Title: Dovecot vulnerability
Summary: Dovecot could be made to expose sensitive information over the network.
It was discovered that Dovecot 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.
Instructions: In general, a standard system update will make all the necessary changes.
Ubuntu
Dovecot vulnerability
vendor_ubuntu·2019-02-05
CVE-2019-3814 Dovecot vulnerability
Title: Dovecot vulnerability
Summary: Dovecot could be made to expose sensitive information over the network.
USN-3881-1 fixed a vulnerability in Dovecot. This update provides
the corresponding update for Ubuntu 12.04 ESM.
Original advisory details:
It was discovered that Dovecot 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.
Instructions: In general, a standard system update will make all the necessary changes.
Red Hat
dovecot: Improper certificate validation
vendor_redhat·2019-02-05·CVSS 7.7
CVE-2019-3814 [HIGH] CWE-295 dovecot: Improper certificate validation
dovecot: Improper certificate validation
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.
It was discovered that Dovecot 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.
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
Pac
Debian
CVE-2019-3814: dovecot - It was discovered that Dovecot before versions 2.2.36.1 and 2.3.4.1 incorrectly ...
vendor_debian·2019·CVSS 7.7
CVE-2019-3814 [HIGH] CVE-2019-3814: dovecot - It was discovered that Dovecot before versions 2.2.36.1 and 2.3.4.1 incorrectly ...
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.
Scope: local
bookworm: resolved (fixed in 1:2.3.4.1-1)
bullseye: resolved (fixed in 1:2.3.4.1-1)
forky: resolved (fixed in 1:2.3.4.1-1)
sid: resolved (fixed in 1:2.3.4.1-1)
trixie: resolved (fixed in 1:2.3.4.1-1)
GHSA
GHSA-2727-qgh5-485g: It was discovered that Dovecot before versions 2
ghsa_unreviewed·2022-05-24
CVE-2019-3814 [MEDIUM] CWE-295 GHSA-2727-qgh5-485g: It was discovered that Dovecot before versions 2
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.
OSV
CVE-2019-3814: It was discovered that Dovecot before versions 2
osv·2019-03-27·CVSS 6.8
CVE-2019-3814 [MEDIUM] CVE-2019-3814: It was discovered that Dovecot before versions 2
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.
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2019-3814 dovecot: Improper certificate validation [fedora-all]
bugzilla·2019-02-07·CVSS 7.7
CVE-2019-3814 [HIGH] CVE-2019-3814 dovecot: Improper certificate validation [fedora-all]
CVE-2019-3814 dovecot: Improper certificate validation [fedora-all]
This is an automatically created tracking bug! It was created to ensure
that one or more security vulnerabilities are fixed in affected versions
of fedora-all.
For comments that are specific to the vulnerability please use bugs filed
against the "Security Response" product referenced in the "Blocks" field.
For more information see:
http://fedoraproject.org/wiki/Security/TrackingBugs
When submitting as an update, use the fedpkg template provided in the next
comment(s). This will include the bug IDs of this tracking bug as well as
the relevant top-level CVE bugs.
Please also mention the CVE IDs being fixed in the RPM changelog and the
fedpkg commit message.
NOTE: this issue affects multiple supported versions of Fedora
Bugzilla
CVE-2019-3814 dovecot: Improper certificate validation
bugzilla·2019-02-07·CVSS 7.7
CVE-2019-3814 [HIGH] CVE-2019-3814 dovecot: Improper certificate validation
CVE-2019-3814 dovecot: Improper certificate validation
It was discovered that Dovecot 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.
References:
https://security-tracker.debian.org/tracker/source-package/dovecot
https://usn.ubuntu.com/usn/usn-3881-1
https://usn.ubuntu.com/usn/usn-3881-2
Discussion:
Created dovecot tracking bugs for this issue:
Affects: fedora-all [bug 1673416]
---
External References:
https://www.dovecot.org/list/dovecot/2019-February/114575.html
---
This basically affects installation which enable client-side certs. When authenticating with a cert which has empty "user" field, vulnerable versions take the loginame from the user.
http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00067.htmlhttps://access.redhat.com/errata/RHSA-2019:3467https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3814https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4XLI55NGRDTGMVOPYFCPPFNPA5VKYSSY/https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QHFZ5OWRIZGIWZJ5PTNVWWZNLLNH4XYS/https://security.gentoo.org/glsa/201904-19https://www.dovecot.org/list/dovecot/2019-February/114575.htmlhttp://lists.opensuse.org/opensuse-security-announce/2019-04/msg00067.htmlhttps://access.redhat.com/errata/RHSA-2019:3467https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3814https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4XLI55NGRDTGMVOPYFCPPFNPA5VKYSSY/https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QHFZ5OWRIZGIWZJ5PTNVWWZNLLNH4XYS/https://security.gentoo.org/glsa/201904-19https://www.dovecot.org/list/dovecot/2019-February/114575.html
2019-03-27
Published