Debian dsa-6313 : dovecot-auth-lua - security update

critical Nessus Plugin ID 318247

Synopsis

The remote Debian host is missing one or more security-related updates.

Description

The remote Debian 12 / 13 host has packages installed that are affected by multiple vulnerabilities as referenced in the dsa-6313 advisory.

- ------------------------------------------------------------------------- Debian Security Advisory DSA-6313-1 [email protected] https://www.debian.org/security/ Moritz Muehlenhoff May 31, 2026 https://www.debian.org/security/faq
- -------------------------------------------------------------------------

Package : dovecot CVE ID : CVE-2026-33603 CVE-2026-40016 CVE-2026-40020 CVE-2026-42006 CVE-2026-27851

Multiple vulnerabilities have been discovered in the Dovecot IMAP server which way result in denial of service, SQL injection or man-in-the-midddle attacks

For the oldstable distribution (bookworm), these problems have been fixed in version 1:2.3.19.1+dfsg1-2.1+deb12u6.

For the stable distribution (trixie), these problems have been fixed in version 1:2.4.1+dfsg1-6+deb13u6.

We recommend that you upgrade your dovecot packages.

For the detailed security status of dovecot please refer to its security tracker page at:
https://security-tracker.debian.org/tracker/dovecot

Further information about Debian Security Advisories, how to apply these updates to your system and frequently asked questions can be found at: https://www.debian.org/security/

Mailing list: [email protected]

Tenable has extracted the preceding description block directly from the Debian security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Upgrade the dovecot-auth-lua packages.

Plugin Details

Severity: Critical

ID: 318247

File Name: debian_DSA-6313.nasl

Version: 1.1

Type: Local

Agent: unix

Family: Debian Local Security Checks

Published: 6/2/2026

Updated: 6/2/2026

Supported Sensors: Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.0

CVSS v2

Risk Factor: High

Base Score: 9.4

Temporal Score: 7

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:N

CVSS Score Source: CVE-2026-27851

CVSS v3

Risk Factor: Critical

Base Score: 9.1

Temporal Score: 7.9

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:dovecot-lmtpd, p-cpe:/a:debian:debian_linux:dovecot-flatcurve, cpe:/o:debian:debian_linux:12.0, p-cpe:/a:debian:debian_linux:dovecot-pgsql, p-cpe:/a:debian:debian_linux:dovecot-sieve, p-cpe:/a:debian:debian_linux:dovecot-imapd, p-cpe:/a:debian:debian_linux:dovecot-sqlite, cpe:/o:debian:debian_linux:13.0, p-cpe:/a:debian:debian_linux:dovecot-submissiond, p-cpe:/a:debian:debian_linux:dovecot-solr, p-cpe:/a:debian:debian_linux:dovecot-pop3d, p-cpe:/a:debian:debian_linux:dovecot-gssapi, p-cpe:/a:debian:debian_linux:dovecot-lucene, p-cpe:/a:debian:debian_linux:dovecot-managesieved, p-cpe:/a:debian:debian_linux:dovecot-dev, p-cpe:/a:debian:debian_linux:dovecot-core, p-cpe:/a:debian:debian_linux:dovecot-auth-lua, p-cpe:/a:debian:debian_linux:dovecot-ldap, p-cpe:/a:debian:debian_linux:dovecot-mysql

Required KB Items: Host/local_checks_enabled, Host/Debian/release, Host/Debian/dpkg-l

Exploit Ease: No known exploits are available

Patch Publication Date: 5/31/2026

Vulnerability Publication Date: 5/12/2026

Reference Information

CVE: CVE-2026-27851, CVE-2026-33603, CVE-2026-40016, CVE-2026-40020, CVE-2026-42006

Detections

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