CVE-2016-8652

Name: CVE-2016-8652
Creator: NVD / NIST
Published: 2017-02-17T02:59:13.547+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 48.20%

Last modified Jun 17, 2026

CVE-2016-8652 is a vulnerability of currently unknown severity. The auth component in Dovecot before 2.2.27, when auth-policy is configured, allows a remote attackers to cause a denial of service (crash) by aborting authentication without setting a username.. EPSS estimates a 48.20% chance of exploitation in the next 30 days.

Description

The auth component in Dovecot before 2.2.27, when auth-policy is configured, allows a remote attackers to cause a denial of service (crash) by aborting authentication without setting a username.

Metrics

EPSS Probability

48.20%

98.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-20

Affected Software

Vendor	Product	Versions
Dovecot	Dovecot	<= 2.2.27

References

http://dovecot.org/pipermail/dovecot-news/2016-December/000333.htmlRelease Notes, Vendor Advisory
http://www.openwall.com/lists/oss-security/2016/12/02/4Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2016/12/05/12Mailing List, Third Party Advisory
http://www.securityfocus.com/bid/94639Third Party Advisory, VDB Entry
http://dovecot.org/pipermail/dovecot-news/2016-December/000333.htmlRelease Notes, Vendor Advisory
http://www.openwall.com/lists/oss-security/2016/12/02/4Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2016/12/05/12Mailing List, Third Party Advisory
http://www.securityfocus.com/bid/94639Third Party Advisory, VDB Entry

Timeline

Published: Feb 17, 2017
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2016-8652?

The auth component in Dovecot before 2.2.27, when auth-policy is configured, allows a remote attackers to cause a denial of service (crash) by aborting authentication without setting a username.

How severe is CVE-2016-8652?

Severity scoring for CVE-2016-8652 is pending analysis. The EPSS model estimates a 48.20% probability of exploitation in the next 30 days.

How do I fix CVE-2016-8652?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2016-8652?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST