Vulnerability Details

Dovecot 2.3.9 < 2.3.9.3 Multiple Vulnerabilities

Published: 2020-02-13 09:58:21
CVE Author: NIST National Vulnerability Database (NVD)

CVSS Base Vector:
AV:N/AC:L/Au:N/C:N/I:N/A:C

Detection Type:
Remote Banner Unreliable

Solution Type:
Vendor Patch

Summary:
Dovecot is prone to multiple vulnerabilities.

Technical Details:
The following vulnerabilities exist: - The IMAP and LMTP components in Dovecot mishandle snippet generation when many characters must be read to compute the snippet and a trailing > character exists. This causes a denial of service in which the recipient cannot read all of their messages. - lib-smtp in submission-login and lmtp in Dovecot mishandles truncated UTF-8 data in command parameters.

Impact:
Successful exploitation would cause various system processes to be exhausted, leading into a denial of service and CPU resource exhaustion, or cause the mailbox to be permanently unaccessible.

Detection Method:
Checks if a vulnerable version is present on the target host.

Affected Versions:
Dovecot versions 2.3.9 before 2.3.9.3.

Recommendations:
Update to version 2.3.9.3 or later.

NIST (National Institute of Standards and Technology) NVD (National Vulnerability Database)

https://nvd.nist.gov/vuln/detail/CVE-2020-7957
https://nvd.nist.gov/vuln/detail/CVE-2020-7046

References:

https://dovecot.org/pipermail/dovecot-news/2020-February/000430.html
https://dovecot.org/pipermail/dovecot-news/2020-February/000431.html

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Severity
High
CVSS Score
7.8

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