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CVE-2019-11499

In the IMAP Server in Dovecot 2.3.3 through 2.3.5.2, the submission-login component crashes if...

7.5 HighFix available

In the IMAP Server in Dovecot 2.3.3 through 2.3.5.2, the submission-login component crashes if AUTH PLAIN is attempted over a TLS secured channel with an unacceptable authentication message.

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

2.53%Up 1.1 points since Apr 14, 2021
90%50%10%1%

What each source reports

NVD Score used 7.5

In the IMAP Server in Dovecot 2.3.3 through 2.3.5.2, the submission-login component crashes if AUTH PLAIN is attempted over a TLS secured channel with an unacceptable authentication message.

Record
CVE-2019-11499
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 2.0
5.0 MediumAV:N/AC:L/Au:N/C:N/I:N/A:P
Updated
2026-11-02
CVE List No score

In the IMAP Server in Dovecot 2.3.3 through 2.3.5.2, the submission-login component crashes if AUTH PLAIN is attempted over a TLS secured channel with an unacceptable authentication message.

Record
CVE-2019-11499
Updated
2026-11-02
EUVDEUVD-2019-3172 No score

In the IMAP Server in Dovecot 2.3.3 through 2.3.5.2, the submission-login component crashes if AUTH PLAIN is attempted over a TLS secured channel with an unacceptable authentication message.

Record
EUVD-2019-3172
Updated
2026-11-03
GitHub AdvisoriesGHSA-v7jr-wfqh-v962 7.5

In the IMAP Server in Dovecot 2.3.3 through 2.3.5.2, the submission-login component crashes if...

In the IMAP Server in Dovecot 2.3.3 through 2.3.5.2, the submission-login component crashes if AUTH PLAIN is attempted over a TLS secured channel with an unacceptable authentication message.

Record
GHSA-v7jr-wfqh-v962
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVALPINE-CVE-2019-11499 7.5

In the IMAP Server in Dovecot 2.3.3 through 2.3.5.2, the submission-login component crashes if AUTH PLAIN is attempted over a TLS secured channel with an unacceptable authentication message.

Record
ALPINE-CVE-2019-11499
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSV 7.5

In the IMAP Server in Dovecot 2.3.3 through 2.3.5.2, the submission-login component crashes if AUTH PLAIN is attempted over a TLS secured channel with an unacceptable authentication message.

Record
CVE-2019-11499
CVSS 3.1
7.5 HighCVSS: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-2019-11499 7.5

In the IMAP Server in Dovecot 2.3.3 through 2.3.5.2, the submission-login component crashes if AUTH PLAIN is attempted over a TLS secured channel with an unacceptable authentication message.

Record
DEBIAN-CVE-2019-11499
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVUBUNTU-CVE-2019-11499 7.5

In the IMAP Server in Dovecot 2.3.3 through 2.3.5.2, the submission-login component crashes if AUTH PLAIN is attempted over a TLS secured channel with an unacceptable authentication message.

Record
UBUNTU-CVE-2019-11499
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 3.0
7.5 HighCVSS: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

Affected packages
PackageAffectedFixed
dovecot
Alpine:v3.10
 2.3.3 up to 2.3.6-r0
2.3.6-r0
dovecot
Alpine:v3.11
 2.3.3 up to 2.3.6-r0
2.3.6-r0
dovecot
Alpine:v3.12
 2.3.3 up to 2.3.6-r0
2.3.6-r0
dovecot
Alpine:v3.13
 2.3.3 up to 2.3.6-r0
2.3.6-r0
dovecot
Alpine:v3.14
 2.3.3 up to 2.3.6-r0
2.3.6-r0
dovecot
Alpine:v3.15
 2.3.3 up to 2.3.6-r0
2.3.6-r0
dovecot
Alpine:v3.16
 2.3.3 up to 2.3.6-r0
2.3.6-r0
dovecot
Alpine:v3.17
 2.3.3 up to 2.3.6-r0
2.3.6-r0
dovecot
Alpine:v3.18
 2.3.3 up to 2.3.6-r0
2.3.6-r0
dovecot
Alpine:v3.19
 2.3.3 up to 2.3.6-r0
2.3.6-r0
Show 15 moreShow less
Affected packages
PackageAffectedFixed
dovecot
Alpine:v3.20
 2.3.3 up to 2.3.6-r0
2.3.6-r0
dovecot
Alpine:v3.21
 2.3.3 up to 2.3.6-r0
2.3.6-r0
dovecot
Alpine:v3.22
 2.3.3 up to 2.3.6-r0
2.3.6-r0
dovecot
Alpine:v3.23
 2.3.3 up to 2.3.6-r0
2.3.6-r0
dovecot
Alpine:v3.24
 2.3.3 up to 2.3.6-r0
2.3.6-r0
dovecot
Alpine:v3.8
 2.3.3 up to 2.3.6-r0
2.3.6-r0
dovecot
Alpine:v3.9
 2.3.3 up to 2.3.6-r0
2.3.6-r0
dovecot
Debian:12
 before 1:2.3.4.1-5
1:2.3.4.1-5
dovecot
Debian:13
 before 1:2.3.4.1-5
1:2.3.4.1-5
dovecot
Debian:14
 before 1:2.3.4.1-5
1:2.3.4.1-5
dovecot23
SUSE: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
dovecot23
openSUSE:Leap 15.0
From an advisory covering 3 CVEs
 before 2.3.3-lp150.14.1
2.3.3-lp150.14.1
dovecot23
openSUSE:Leap 15.1
From an advisory covering 3 CVEs
 before 2.3.3-lp151.2.6.1
2.3.3-lp151.2.6.1
dovecot23
openSUSE:Tumbleweed
From an advisory covering 22 CVEs
 before 2.3.16-1.6
2.3.16-1.6
dovecot24
openSUSE:Tumbleweed
From an advisory covering 24 CVEs
 before 2.4.0-1.1
2.4.0-1.1

History

History
RecordedChangedSources
affected, facts
affected
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2019-11499 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 2.53%, the 84th percentile. Fixed in dovecot 2.3.6-r0.

References

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