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Ubuntu 16.04 LTS : Dovecot regression (USN-3258-2)

high Nessus Plugin ID 99303

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Synopsis

The remote Ubuntu host is missing a security update.

Description

The remote Ubuntu 16.04 LTS host has packages installed that are affected by a vulnerability as referenced in the USN-3258-2 advisory.

 USN-3258-1 intended to fix a vulnerability in Dovecot. Further investigation revealed that only Dovecot versions 2.2.26 and newer were affected by the vulnerability. Additionally, the change introduced a regression when Dovecot was configured to use the dict authentication database. This update reverts the change. We apologize for the inconvenience.

 Original advisory details:

 It was discovered that Dovecot incorrectly handled some usernames. An attacker

 could possibly use this issue to cause Dovecot to hang or crash, resulting in a

 denial of service.

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

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

Solution

Update the affected packages.

See Also

https://ubuntu.com/security/notices/USN-3258-2

Plugin Details

Severity: High

ID: 99303

File Name: ubuntu_USN-3258-2.nasl

Version: 3.12

Type: local

Agent: unix

Published: 4/12/2017

Updated: 8/27/2024

Supported Sensors: Agentless Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

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

CVSS Score Source: CVE-2017-2669

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

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

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

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:dovecot-lmtpd, p-cpe:/a:canonical:ubuntu_linux:dovecot-core, p-cpe:/a:canonical:ubuntu_linux:dovecot-pop3d, p-cpe:/a:canonical:ubuntu_linux:dovecot-sieve, p-cpe:/a:canonical:ubuntu_linux:dovecot-imapd, p-cpe:/a:canonical:ubuntu_linux:dovecot-ldap, p-cpe:/a:canonical:ubuntu_linux:dovecot-pgsql, p-cpe:/a:canonical:ubuntu_linux:dovecot-sqlite, cpe:/o:canonical:ubuntu_linux:16.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:dovecot-lucene, p-cpe:/a:canonical:ubuntu_linux:dovecot-managesieved, p-cpe:/a:canonical:ubuntu_linux:dovecot-mysql, p-cpe:/a:canonical:ubuntu_linux:mail-stack-delivery, p-cpe:/a:canonical:ubuntu_linux:dovecot-solr, p-cpe:/a:canonical:ubuntu_linux:dovecot-dev, p-cpe:/a:canonical:ubuntu_linux:dovecot-gssapi

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

Exploit Ease: No known exploits are available

Patch Publication Date: 4/11/2017

Vulnerability Publication Date: 6/21/2018

Reference Information

CVE: CVE-2017-2669

USN: 3258-2