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CVE-2019-10691

Published: 18 April 2019

The JSON encoder in Dovecot before 2.3.5.2 allows attackers to repeatedly crash the authentication service by attempting to authenticate with an invalid UTF-8 sequence as the username.

Notes

AuthorNote
mdeslaur
2.3 only

Priority

Medium

Cvss 3 Severity Score

7.5

Score breakdown

Status

Package Release Status
dovecot
Launchpad, Ubuntu, Debian
upstream
Released (2.3.5.2)
trusty Not vulnerable
(1:2.2.9-1ubuntu2.6)
xenial Not vulnerable
(1:2.2.22-1ubuntu2.10)
bionic Not vulnerable
(1:2.2.33.2-1ubuntu4.3)
cosmic
Released (1:2.3.2.1-1ubuntu3.3)
disco
Released (1:2.3.4.1-1ubuntu2.1)

Severity score breakdown

Parameter Value
Base score 7.5
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H