CVE-2019-10691

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.

7.5

CVSS

Severity: High

CVSS 3.0 •

CVSS 2.0 •

EPSS 0.81% Top 30%

Vendor Advisory opensuse.org Vendor Advisory fedoraproject.org Vendor Advisory gentoo.org Vendor Advisory dovecot.org

Affected: n/a n/a

References

Link	Tags
http://www.openwall.com/lists/oss-security/2019/04/18/3	third party advisory mailing list
https://dovecot.org/list/dovecot-news/2019-April/000406.html	mailing list vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00000.html	mailing list third party advisory vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QHFZ5OWRIZGIWZJ5PTNVWWZNLLNH4XYS/	vendor advisory
https://security.gentoo.org/glsa/201908-29	vendor advisory

Frequently Asked Questions

What is the severity of CVE-2019-10691?: CVE-2019-10691 has been scored as a high severity vulnerability.
How to fix CVE-2019-10691?: To fix CVE-2019-10691, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2019-10691 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2019-10691 is being actively exploited. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.

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