Vulnerability CVE-2019-10691
Published: 2019-04-24

Description:
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.

Type:

CWE-287

 (Improper Authentication)

CVSS2 => (AV:N/AC:L/Au:N/C:N/I:N/A:P)

CVSS Base Score
Impact Subscore
Exploitability Subscore
5/10
2.9/10
10/10
Exploit range
Attack complexity
Authentication
Remote
Low
No required
Confidentiality impact
Integrity impact
Availability impact
None
None
Partial
Affected software
Opensuse -> LEAP 
Dovecot -> Dovecot 

 References:
http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00000.html
http://www.openwall.com/lists/oss-security/2019/04/18/3
https://dovecot.org/list/dovecot-news/2019-April/000406.html
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/QHFZ5OWRIZGIWZJ5PTNVWWZNLLNH4XYS/
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