Executive Summary

Title opensmtpd security update
Name DSA-4634 First vendor Publication 2020-02-26
Vendor Debian Last vendor Modification 2020-02-26
Severity (Vendor) N/A Revision 1

Security-Database Scoring CVSS v3

Cvss vector : CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Overall CVSS Score 9.8
Base Score 9.8 Environmental Score 9.8
impact SubScore 5.9 Temporal Score 9.8
Exploitabality Sub Score 3.9
Attack Vector Network Attack Complexity Low
Privileges Required None User Interaction None
Scope Unchanged Confidentiality Impact High
Integrity Impact High Availability Impact High
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:N/AC:L/Au:N/C:C/I:C/A:C)
Cvss Base Score 10 Attack Range Network
Cvss Impact Score 10 Attack Complexity Low
Cvss Expoit Score 10 Authentication None Required
Calculate full CVSS 2.0 Vectors scores


Qualys discovered that the OpenSMTPD SMTP server performed insufficient validation of SMTP commands, which could result in local privilege escalation or the execution of arbitrary code.

For the oldstable distribution (stretch), this problem has been fixed in version 6.0.2p1-2+deb9u3.

For the stable distribution (buster), this problem has been fixed in version 6.0.3p1-5+deb10u4.

We recommend that you upgrade your opensmtpd packages.

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

Original Source

Url : http://www.debian.org/security/2020/dsa-4634

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-125 Out-of-bounds Read

CPE : Common Platform Enumeration

Application 1

Snort® IPS/IDS

Date Description
2020-07-29 OpenSMTPD mta_io remote command injection attempt
RuleID : 54388 - Revision : 1 - Type : SERVER-OTHER
2020-07-02 OpenSMTPD mta_io remote command injection attempt
RuleID : 54122 - Revision : 1 - Type : SERVER-OTHER

Alert History

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Date Informations
2020-05-23 13:03:43
  • Multiple Updates
2020-02-27 00:18:19
  • First insertion