Detections
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Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS : Dovecot vulnerabilities (USN-4456-1)

high Nessus Plugin ID 139567

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Synopsis

The remote Ubuntu host is missing one or more security updates.

Description

The remote Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-4456-1 advisory.

 It was discovered that Dovecot incorrectly handled deeply nested MIME parts. A remote attacker could possibly use this issue to cause Dovecot to consume resources, resulting in a denial of service.
 (CVE-2020-12100)

 It was discovered that Dovecot incorrectly handled memory when using NTLM. A remote attacker could possibly use this issue to cause Dovecot to crash, resulting in a denial of service. (CVE-2020-12673)

 It was discovered that the Dovecot RPA mechanism incorrectly handled zero-length messages. A remote attacker could possibly use this issue to cause Dovecot to crash, resulting in a denial of service.
 (CVE-2020-12674)

Tenable has extracted the preceding description block directly from the Ubuntu 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

Update the affected packages.

See Also

https://ubuntu.com/security/notices/USN-4456-1

Plugin Details

Severity: High

ID: 139567

File Name: ubuntu_USN-4456-1.nasl

Version: 1.9

Type: local

Agent: unix

Published: 8/13/2020

Updated: 8/29/2024

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

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.9

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

CVSS Score Source: CVE-2020-12674

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.7

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:P/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:canonical:ubuntu_linux:20.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:dovecot-imapd, p-cpe:/a:canonical:ubuntu_linux:dovecot-auth-lua, p-cpe:/a:canonical:ubuntu_linux:dovecot-mysql, p-cpe:/a:canonical:ubuntu_linux:dovecot-dev, p-cpe:/a:canonical:ubuntu_linux:dovecot-lmtpd, p-cpe:/a:canonical:ubuntu_linux:dovecot-sieve, p-cpe:/a:canonical:ubuntu_linux:dovecot-ldap, p-cpe:/a:canonical:ubuntu_linux:dovecot-pgsql, cpe:/o:canonical:ubuntu_linux:18.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:dovecot-managesieved, p-cpe:/a:canonical:ubuntu_linux:dovecot-core, p-cpe:/a:canonical:ubuntu_linux:dovecot-lucene, p-cpe:/a:canonical:ubuntu_linux:dovecot-pop3d, p-cpe:/a:canonical:ubuntu_linux:dovecot-sqlite, cpe:/o:canonical:ubuntu_linux:16.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:mail-stack-delivery, p-cpe:/a:canonical:ubuntu_linux:dovecot-submissiond, p-cpe:/a:canonical:ubuntu_linux:dovecot-solr, p-cpe:/a:canonical:ubuntu_linux:dovecot-gssapi

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 8/12/2020

Vulnerability Publication Date: 8/12/2020

Reference Information

CVE: CVE-2020-12100, CVE-2020-12673, CVE-2020-12674

USN: 4456-1