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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
SHA-256 | abe43f7110bb331986cc5d9ed522108c73061ac20671c668b7da6fcdfb9996c1

Related Files

Gentoo Linux Security Advisory 202105-12
Posted May 26, 2021
Authored by Gentoo | Site security.gentoo.org

Gentoo Linux Security Advisory 202105-12 - Multiple vulnerabilities have been found in OpenSMTPD, the worst of which could result in a Denial of Service condition. Versions less than 6.8.0_p2 are affected.

tags | advisory, denial of service, vulnerability
systems | linux, gentoo
advisories | CVE-2020-35679, CVE-2020-35680
SHA-256 | 63e9612b85c76f91b6a2176f6cbb6399d8b1c31a84dacd5a1a4a248e4efb8553
OpenSMTPD Out-Of-Bounds Read / Local Privilege Escalation
Posted Mar 5, 2020
Authored by wvu, Qualys Security Advisory | Site metasploit.com

This Metasploit module exploits an out-of-bounds read of an attacker-controlled string in OpenSMTPD's MTA implementation to execute a command as the root or nobody user, depending on the kind of grammar OpenSMTPD uses.

tags | exploit, root
advisories | CVE-2020-8794
SHA-256 | eaae80dd2ec7c12121e43d82f332898ca6bf36eb080cf1316770e1ef1e93f2f0
Ubuntu Security Notice USN-4294-1
Posted Mar 2, 2020
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4294-1 - It was discovered that OpenSMTPD mishandled certain input. A remote, unauthenticated attacker could use this vulnerability to execute arbitrary shell commands as any non-root user. It was discovered that OpenSMTPD did not properly handle hardlinks under certain conditions. An unprivileged local attacker could read the first line of any file on the filesystem.

tags | advisory, remote, arbitrary, shell, local, root
systems | linux, ubuntu
advisories | CVE-2020-8793, CVE-2020-8794
SHA-256 | 5b6805dc7503709eaa6444271d78fe6c8eb7dcb5aa91a23ed44fee1b7b1d5835
Debian Security Advisory 4634-1
Posted Feb 28, 2020
Authored by Debian | Site debian.org

Debian Linux Security Advisory 4634-1 - 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.

tags | advisory, arbitrary, local
systems | linux, debian
advisories | CVE-2020-8794
SHA-256 | 5da50339d4d1fb31d2ce2fa5d1c69b447dfd44db51920c67a0c326da5a65d4c0
OpenSMTPD Out-Of-Bounds Read
Posted Feb 25, 2020
Authored by Qualys Security Advisory

Qualys discovered a vulnerability in OpenSMTPD, OpenBSD's mail server. This vulnerability, an out-of-bounds read introduced in December 2015, is exploitable remotely and leads to the execution of arbitrary shell commands.

tags | exploit, arbitrary, shell
systems | openbsd
advisories | CVE-2020-8794
SHA-256 | 2c58b82819510289b2fd55d1c6a82b81b279777abd6a6b0db391f990ec12b148
OpenSMTPD Local Information Disclosure
Posted Feb 25, 2020
Authored by Qualys Security Advisory

Qualys discovered a minor vulnerability in OpenSMTPD, OpenBSD's mail server. An unprivileged local attacker can read the first line of an arbitrary file (for example, root's password hash in /etc/master.passwd) or the entire contents of another user's file (if this file and /var/spool/smtpd/ are on the same filesystem). A proof of concept exploit is included in this archive.

tags | exploit, arbitrary, local, root, proof of concept
systems | openbsd
advisories | CVE-2020-8793
SHA-256 | 3617b8854e485e1d063e08764e96429e54c6b7bb0467d127e819133f80c925d5
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
SHA-256 | f42f9b3d984851bedec7966cba6c70991ad906a48462064b1ae90325c6aa112b
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
SHA-256 | 57c3324e249d1cbd264a76ba4f846f6f97ae95eb20be6fe751558e8ce2444825
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
SHA-256 | fb1a4c6a7673d1e704ce5b14810da07fcd07eca7997ed43842b41e748c35f68a
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
SHA-256 | b13a8757f4f9e0b2f590ed0cdbe4d23e4718fa37e2ea6ca4ed4d48c3bfa33f2a
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
SHA-256 | 9415f92980a964e9430ed555502126d19de735d2acfd5db27d83bb342e5a8b2c
Gentoo Linux Security Advisory 201601-04
Posted Jan 27, 2016
Authored by Gentoo | Site security.gentoo.org

Gentoo Linux Security Advisory 201601-4 - Multiple vulnerabilities have been found in OpenSMTPD, the worst allowing remote attackers to execute arbitrary code. Versions less than 5.7.3_p1 are affected.

tags | advisory, remote, arbitrary, vulnerability
systems | linux, gentoo
SHA-256 | d62d01579964fac63bf4746a32bf41e5b67100440041d0086c611de45fba65c2
Qualys Security Advisory - OpenSMTPD Audit Report
Posted Oct 4, 2015
Authored by Qualys Security Advisory

Qualys discovered various vulnerabilities in OpenSMTPD. These include, but are not limited to, denial of service, buffer overflow, hardlink attack and use-after-free vulnerabilities.

tags | advisory, denial of service, overflow, vulnerability
SHA-256 | a0a4071e027cd0032bb15321814e2500f5dbd461a8b3356d921e787243fd6c28
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