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CVE-2020-7247

Status Candidate

Overview

smtp_mailaddr in smtp_session.c in OpenSMTPD 6.6, as used in OpenBSD 6.6 and other products, allows remote attackers to execute arbitrary commands as root via a crafted SMTP session, as demonstrated by shell metacharacters in a MAIL FROM field. This affects the "uncommented" default configuration. The issue exists because of an incorrect return value upon failure of input validation.

Related Files

OpenSMTPD 6.6.1 Local Privilege Escalation
Posted Feb 11, 2020
Authored by Marco Ivaldi

smtp_mailaddr in smtp_session.c in OpenSMTPD 6.6, as used in OpenBSD 6.6 and other products, allows remote attackers to execute arbitrary commands as root via a crafted SMTP session, as demonstrated by shell meta-characters in a MAIL FROM field. This affects the "uncommented" default configuration. The issue exists because of an incorrect return value upon failure of input validation.

tags | exploit, remote, arbitrary, shell, root
systems | openbsd
advisories | CVE-2020-7247
MD5 | a5d9222315a88dc369bf246ac8d4d034
OpenSMTPD MAIL FROM Remote Code Execution
Posted Feb 7, 2020
Authored by wvu, Qualys Security Advisory | Site metasploit.com

This Metasploit module exploits a command injection in the MAIL FROM field during SMTP interaction with OpenSMTPD to execute code as the root user.

tags | exploit, root
advisories | CVE-2020-7247
MD5 | 2b9fdae42ead941fa800754cf08e9965
Ubuntu Security Notice USN-4268-1
Posted Feb 5, 2020
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4268-1 - It was discovered that OpenSMTPD incorrectly verified the sender's or receiver's e-mail addresses under certain conditions. An attacker could use this vulnerability to execute arbitrary commands as root.

tags | advisory, arbitrary, root
systems | linux, ubuntu
advisories | CVE-2020-7247
MD5 | 790d961de63720b957664ca4b2256e8b
Debian Security Advisory 4611-1
Posted Jan 30, 2020
Authored by Debian | Site debian.org

Debian Linux Security Advisory 4611-1 - Qualys discovered that the OpenSMTPD SMTP server performed insufficient validation of email addresses which could result in the execution of arbitrary commands as root. In addition this update fixes a denial of service by triggering an opportunistic TLS downgrade.

tags | advisory, denial of service, arbitrary, root
systems | linux, debian
advisories | CVE-2020-7247
MD5 | 86b57c455931fcd59ee4f86326e684f4
OpenSMTPD 6.6.2 Remote Code Execution
Posted Jan 30, 2020
Authored by Qualys Security Advisory, 1F98D

OpenSMTPD version 6.6.2 remote code execution exploit.

tags | exploit, remote, code execution
advisories | CVE-2020-7247
MD5 | 720e1a175b5cc8abf21ab6dbeb5c21e7
OpenBSD OpenSMTPD Privilege Escalation / Code Execution
Posted Jan 29, 2020
Authored by Qualys Security Advisory

Qualys discovered a vulnerability in OpenSMTPD, OpenBSD's mail server. This vulnerability is exploitable since May 2018 (commit a8e222352f, "switch smtpd to new grammar") and allows an attacker to execute arbitrary shell commands, as root.

tags | exploit, arbitrary, shell, root
systems | openbsd
advisories | CVE-2020-7247
MD5 | a167abd4844564a180e18a022a305764
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