Amazon Linux 2 : dovecot (ALAS-2020-1489)

Medium Nessus Plugin ID 140636

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VPR Score: 5.1

Synopsis

The remote Amazon Linux 2 host is missing a security update.

Description

The version of tested product installed on the remote host is prior to tested version. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2-2020-1489 advisory.

- In Dovecot before 2.3.11.3, uncontrolled recursion in submission, lmtp, and lda allows remote attackers to cause a denial of service (resource consumption) via a crafted e-mail message with deeply nested MIME parts. (CVE-2020-12100)

- In Dovecot before 2.3.11.3, sending a specially formatted NTLM request will crash the auth service because of an out-of-bounds read. (CVE-2020-12673)

- In Dovecot before 2.3.11.3, sending a specially formatted RPA request will crash the auth service because a length of zero is mishandled. (CVE-2020-12674)

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

Solution

Run 'yum update dovecot' to update your system.

See Also

https://alas.aws.amazon.com/AL2/ALAS-2020-1489.html

https://access.redhat.com/security/cve/CVE-2020-12100

https://access.redhat.com/security/cve/CVE-2020-12673

https://access.redhat.com/security/cve/CVE-2020-12674

Plugin Details

Severity: Medium

ID: 140636

File Name: al2_ALAS-2020-1489.nasl

Version: 1.2

Type: local

Agent: unix

Published: 2020/09/17

Updated: 2020/09/25

Dependencies: 12634

Risk Information

Risk Factor: Medium

VPR Score: 5.1

CVSS Score Source: CVE-2020-12674

CVSS v2.0

Base Score: 5

Temporal Score: 3.7

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

Temporal Vector: CVSS2#E:U/RL:OF/RC:C

CVSS v3.0

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:amazon:linux:dovecot, p-cpe:/a:amazon:linux:dovecot-debuginfo, p-cpe:/a:amazon:linux:dovecot-devel, p-cpe:/a:amazon:linux:dovecot-mysql, p-cpe:/a:amazon:linux:dovecot-pgsql, p-cpe:/a:amazon:linux:dovecot-pigeonhole, cpe:/o:amazon:linux:2

Required KB Items: Host/local_checks_enabled, Host/AmazonLinux/release, Host/AmazonLinux/rpm-list

Exploit Ease: No known exploits are available

Patch Publication Date: 2020/09/15

Vulnerability Publication Date: 2020/08/12

Reference Information

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

ALAS: 2020-1489