CVE-2019-11494
In the IMAP Server in Dovecot 2.3.3 through 2.3.5.2, the submission-login service crashes when...
In the IMAP Server in Dovecot 2.3.3 through 2.3.5.2, the submission-login service crashes when the client disconnects prematurely during the AUTH command.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
In the IMAP Server in Dovecot 2.3.3 through 2.3.5.2, the submission-login service crashes when the client disconnects prematurely during the AUTH command.
- Record
CVE-2019-11494- CVSS 3.0
- 7.5 High
CVSS:3.0/AC:L/AV:N/A:H/C:N/I:N/PR:N/S:U/UI:N - Updated
- 2026-11-02
EUVDEUVD-2019-3167
In the IMAP Server in Dovecot 2.3.3 through 2.3.5.2, the submission-login service crashes when the client disconnects prematurely during the AUTH command.
- Record
EUVD-2019-3167- CVSS 3.0
- 7.5 High
CVSS:3.0/AC:L/AV:N/A:H/C:N/I:N/PR:N/S:U/UI:N - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-gcm9-2h5w-j7x9
In the IMAP Server in Dovecot 2.3.3 through 2.3.5.2, the submission-login service crashes when...
In the IMAP Server in Dovecot 2.3.3 through 2.3.5.2, the submission-login service crashes when the client disconnects prematurely during the AUTH command.
- Record
GHSA-gcm9-2h5w-j7x9- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-476
- Updated
- 2026-11-02
NVD
In the IMAP Server in Dovecot 2.3.3 through 2.3.5.2, the submission-login service crashes when the client disconnects prematurely during the AUTH command.
- Record
CVE-2019-11494- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - CVSS 3.0
- 7.5 High
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - CVSS 2.0
- 5.0 Medium
AV:N/AC:L/Au:N/C:N/I:N/A:P - Weakness
- CWE-476
- Updated
- 2026-11-02
OSVALPINE-CVE-2019-11494
In the IMAP Server in Dovecot 2.3.3 through 2.3.5.2, the submission-login service crashes when the client disconnects prematurely during the AUTH command.
- Record
ALPINE-CVE-2019-11494- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSV
In the IMAP Server in Dovecot 2.3.3 through 2.3.5.2, the submission-login service crashes when the client disconnects prematurely during the AUTH command.
- Record
CVE-2019-11494- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
Show 7 moreShow less
OSVDEBIAN-CVE-2019-11494
In the IMAP Server in Dovecot 2.3.3 through 2.3.5.2, the submission-login service crashes when the client disconnects prematurely during the AUTH command.
- Record
DEBIAN-CVE-2019-11494- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVUBUNTU-CVE-2019-11494
In the IMAP Server in Dovecot 2.3.3 through 2.3.5.2, the submission-login service crashes when the client disconnects prematurely during the AUTH command.
- Record
UBUNTU-CVE-2019-11494- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - CVSS 3.0
- 7.5 High
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVopenSUSE-SU-2019:2278-1 No score
Security update for dovecot23
This update for dovecot23 fixes the following issue:
- CVE-2019-11500: Fixed the NUL byte handling in IMAP and ManageSieve protocol parsers. (bsc#1145559)
- CVE-2019-11499: Fixed a vulnerability where the submission-login would crash over a TLS secured channel (bsc#1133625).
- CVE-2019-11494: Fixed a denial of service if the authentication is aborted by disconnecting (bsc#1133624).
This update was imported from the SUSE:SLE-15:Update update project.
- Record
openSUSE-SU-2019:2278-1- Updated
- 2026-11-02
OSVopenSUSE-SU-2019:2281-1 No score
Security update for dovecot23
This update for dovecot23 fixes the following issues:
- CVE-2019-11500: Fixed the NUL byte handling in IMAP and ManageSieve protocol parsers. (bsc#1145559)
- CVE-2019-11499: Fixed a vulnerability where the submission-login would crash over a TLS secured channel (bsc#1133625).
- CVE-2019-11494: Fixed a denial of service if the authentication is aborted by disconnecting (bsc#1133624).
This update was imported from the SUSE:SLE-15-SP1:Update update project.
- Record
openSUSE-SU-2019:2281-1- Updated
- 2026-11-02
OSVopenSUSE-SU-2024:10726-1 No score
dovecot23-2.3.16-1.6 on GA media
These are all security issues fixed in the dovecot23-2.3.16-1.6 package on the GA media of openSUSE Tumbleweed.
- Record
openSUSE-SU-2024:10726-1- Updated
- 2026-11-02
OSVopenSUSE-SU-2025:14715-1 No score
dovecot24-2.4.0-1.1 on GA media
These are all security issues fixed in the dovecot24-2.4.0-1.1 package on the GA media of openSUSE Tumbleweed.
- Record
openSUSE-SU-2025:14715-1- Updated
- 2026-11-02
OSVSUSE-SU-2019:2514-1 No score
Security update for dovecot23
This update for dovecot23 fixes the following issues:
- CVE-2019-11500: Fixed the NUL byte handling in IMAP and ManageSieve protocol parsers. (bsc#1145559)
- CVE-2019-11499: Fixed a vulnerability where the submission-login would crash over a TLS secured channel (bsc#1133625).
- CVE-2019-11494: Fixed a denial of service if the authentication is aborted by disconnecting (bsc#1133624).
- Record
SUSE-SU-2019:2514-1- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
dovecotAlpine:v3.10 |
2.3.3 up to 2.3.6-r0 | 2.3.6-r0 |
dovecotAlpine:v3.11 |
2.3.3 up to 2.3.6-r0 | 2.3.6-r0 |
dovecotAlpine:v3.12 |
2.3.3 up to 2.3.6-r0 | 2.3.6-r0 |
dovecotAlpine:v3.13 |
2.3.3 up to 2.3.6-r0 | 2.3.6-r0 |
dovecotAlpine:v3.14 |
2.3.3 up to 2.3.6-r0 | 2.3.6-r0 |
dovecotAlpine:v3.15 |
2.3.3 up to 2.3.6-r0 | 2.3.6-r0 |
dovecotAlpine:v3.16 |
2.3.3 up to 2.3.6-r0 | 2.3.6-r0 |
dovecotAlpine:v3.17 |
2.3.3 up to 2.3.6-r0 | 2.3.6-r0 |
dovecotAlpine:v3.18 |
2.3.3 up to 2.3.6-r0 | 2.3.6-r0 |
dovecotAlpine:v3.19 |
2.3.3 up to 2.3.6-r0 | 2.3.6-r0 |
Show 15 moreShow less
| Package | Affected | Fixed |
|---|---|---|
dovecotAlpine:v3.20 |
2.3.3 up to 2.3.6-r0 | 2.3.6-r0 |
dovecotAlpine:v3.21 |
2.3.3 up to 2.3.6-r0 | 2.3.6-r0 |
dovecotAlpine:v3.22 |
2.3.3 up to 2.3.6-r0 | 2.3.6-r0 |
dovecotAlpine:v3.23 |
2.3.3 up to 2.3.6-r0 | 2.3.6-r0 |
dovecotAlpine:v3.24 |
2.3.3 up to 2.3.6-r0 | 2.3.6-r0 |
dovecotAlpine:v3.8 |
2.3.3 up to 2.3.6-r0 | 2.3.6-r0 |
dovecotAlpine:v3.9 |
2.3.3 up to 2.3.6-r0 | 2.3.6-r0 |
dovecotDebian:12 |
before 1:2.3.4.1-5 | 1:2.3.4.1-5 |
dovecotDebian:13 |
before 1:2.3.4.1-5 | 1:2.3.4.1-5 |
dovecotDebian:14 |
before 1:2.3.4.1-5 | 1:2.3.4.1-5 |
dovecot23SUSE:Linux Enterprise Module for Server Applications 15 SP1 From an advisory covering 3 CVEs |
before 2.3.3-8.1 | 2.3.3-8.1 |
dovecot23openSUSE:Leap 15.0 From an advisory covering 3 CVEs |
before 2.3.3-lp150.14.1 | 2.3.3-lp150.14.1 |
dovecot23openSUSE:Leap 15.1 From an advisory covering 3 CVEs |
before 2.3.3-lp151.2.6.1 | 2.3.3-lp151.2.6.1 |
dovecot23openSUSE:Tumbleweed From an advisory covering 22 CVEs |
before 2.3.16-1.6 | 2.3.16-1.6 |
dovecot24openSUSE:Tumbleweed From an advisory covering 24 CVEs |
before 2.4.0-1.1 | 2.4.0-1.1 |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, facts | ||
| affected | ||
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2019-11494 is a high vulnerability (CVSS 7.5) in Dovecot, published April 30, 2019. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.43%, the 84th percentile. Fixed in dovecot 2.3.6-r0.
References
dovecot.org/security.html
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4XLI55NGRDTGMVOPYFCPPFNPA5VKYSSY
lists.opensuse.org/opensuse-security-announce/2019-10/msg00026.html
Show 40 moreShow less
nvd.nist.gov/vuln/detail/CVE-2019-11494
github.com/advisories/GHSA-gcm9-2h5w-j7x9
security.alpinelinux.org/vuln/CVE-2019-11494
security-tracker.debian.org/tracker/CVE-2019-11494
suse.com/support/update/announcement/2019/suse-su-20192514-1
bugzilla.suse.com/1133624
ubuntu.com/security/CVE-2019-11494
cve.org/CVERecord?id=CVE-2019-11494