Known Exploited Vulnerability
9.8
CRITICAL
CVE-2020-7247
OpenSMTPD Remote Code Execution Vulnerability - [Actively Exploited]
Description

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.

INFO

Published Date :

Jan. 29, 2020, 4:15 p.m.

Last Modified :

July 16, 2024, 5:40 p.m.

Source :

[email protected]

Remotely Exploitable :

Yes !

Impact Score :

5.9

Exploitability Score :

3.9
CISA Notification
CISA KEV (Known Exploited Vulnerabilities)

For the benefit of the cybersecurity community and network defenders—and to help every organization better manage vulnerabilities and keep pace with threat activity—CISA maintains the authoritative source of vulnerabilities that have been exploited in the wild.

Description :

smtp_mailaddr in smtp_session.c in OpenSMTPD, as used in OpenBSD and other products, allows remote attackers to execute arbitrary commands as root via a crafted SMTP session.

Required Action :

Apply updates per vendor instructions.

Public PoC/Exploit Available at Github

CVE-2020-7247 has a 32 public PoC/Exploit available at Github. Go to the Public Exploits tab to see the list.

Affected Products

The following products are affected by CVE-2020-7247 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Canonical ubuntu_linux
1 Fedoraproject fedora
1 Debian debian_linux
1 Openbsd opensmtpd
: Total Affected Vendor : 4 | Products : 4
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2020-7247.

URL Resource
http://packetstormsecurity.com/files/156137/OpenBSD-OpenSMTPD-Privilege-Escalation-Code-Execution.html Exploit Third Party Advisory VDB Entry
http://packetstormsecurity.com/files/156145/OpenSMTPD-6.6.2-Remote-Code-Execution.html Exploit Third Party Advisory VDB Entry
http://packetstormsecurity.com/files/156249/OpenSMTPD-MAIL-FROM-Remote-Code-Execution.html Exploit Third Party Advisory VDB Entry
http://packetstormsecurity.com/files/156295/OpenSMTPD-6.6.1-Local-Privilege-Escalation.html Exploit Third Party Advisory VDB Entry
http://packetstormsecurity.com/files/162093/OpenBSD-OpenSMTPD-6.6-Remote-Code-Execution.html Broken Link Third Party Advisory VDB Entry
http://seclists.org/fulldisclosure/2020/Jan/49 Exploit Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2020/01/28/3 Exploit Mailing List Third Party Advisory
https://github.com/openbsd/src/commit/9dcfda045474d8903224d175907bfc29761dcb45 Patch
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OPH4QU4DNVHA7ACFXMYFCEP5PSXXPN4E/ Mailing List Third Party Advisory
https://seclists.org/bugtraq/2020/Jan/51 Mailing List Third Party Advisory
https://usn.ubuntu.com/4268-1/ Third Party Advisory
https://www.debian.org/security/2020/dsa-4611 Mailing List Third Party Advisory
https://www.kb.cert.org/vuls/id/390745 Third Party Advisory US Government Resource
https://www.openbsd.org/security.html Patch Vendor Advisory

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Profile Photo
bakery312/Vulhub-Reproduce

None

Updated: 9 months, 2 weeks ago
0 stars 0 fork 0 watcher
Born at : Jan. 26, 2024, 10:07 a.m. This repo has been linked 161 different CVEs too.
Profile Photo
hwiwonl/dayone

DayOne: Critical Vulnerability Root Cause Analysis Platform

Python JavaScript Ruby HTML Assembly Makefile C Objective-C Shell Dockerfile

Updated: 1 year ago
0 stars 0 fork 0 watcher
Born at : Oct. 15, 2023, 2:18 p.m. This repo has been linked 61 different CVEs too.
Profile Photo
HimmelAward/Goby_POC

在公网收集的gobypoc+部分自己加的poc

Updated: 2 months ago
96 stars 5 fork 5 watcher
Born at : July 28, 2023, 4:28 p.m. This repo has been linked 296 different CVEs too.
Profile Photo
DarkRelay-Security-Labs/vulnlab_aws

Terraform script to deploy vulnerable pentest lab on AWS.

penetration-testing penetration-testing-tools

Shell HCL

Updated: 4 months, 4 weeks ago
4 stars 2 fork 2 watcher
Born at : April 25, 2023, 1:05 p.m. This repo has been linked 1 different CVEs too.
Profile Photo
anquanscan/sec-tools

None

Updated: 2 months ago
17 stars 5 fork 5 watcher
Born at : July 28, 2022, 3:22 a.m. This repo has been linked 149 different CVEs too.
Profile Photo
soosmile/POC

None

Updated: 4 months, 1 week ago
8 stars 1 fork 1 watcher
Born at : June 21, 2022, 7:45 a.m. This repo has been linked 943 different CVEs too.
Profile Photo
superzerosec/poc-exploit-index

POC exploit index

Updated: 2 years, 5 months ago
0 stars 0 fork 0 watcher
Born at : May 19, 2022, 6:09 a.m. This repo has been linked 8 different CVEs too.
Profile Photo
killvxk/Awesome-Exploit

一个漏洞利用工具仓库

Python PHP Java C Makefile C++ Dockerfile Shell Perl RPC

Updated: 2 years, 6 months ago
0 stars 72 fork 72 watcher
Born at : April 22, 2022, 10:21 a.m. This repo has been linked 48 different CVEs too.
Profile Photo
Threekiii/Awesome-Exploit

一个漏洞利用工具仓库

exploit vulnerability proof-of-concept rce

Python PHP Java C Makefile C++ Dockerfile Shell Perl RPC

Updated: 2 months, 2 weeks ago
321 stars 72 fork 72 watcher
Born at : April 22, 2022, 2:08 a.m. This repo has been linked 48 different CVEs too.
Profile Photo
Ostorlab/KEV

Ostorlab KEV: One-command to detect most remotely known exploitable vulnerabilities. Sourced from CISA KEV, Google's Tsunami, Ostorlab's Asteroid and Bug Bounty programs.

cisa-kev vulnerability 0day cisa exploits

Updated: 2 months ago
516 stars 32 fork 32 watcher
Born at : April 19, 2022, 8:58 a.m. This repo has been linked 1181 different CVEs too.
Profile Photo
Threekiii/Vulhub-Reproduce

一个Vulhub漏洞复现知识库

vulnerability exploit

Updated: 2 months ago
448 stars 87 fork 87 watcher
Born at : March 3, 2022, 8:38 a.m. This repo has been linked 171 different CVEs too.
Profile Photo
Threekiii/Awesome-POC

一个漏洞POC知识库 目前数量 1000+

poc

Updated: 2 months ago
3417 stars 682 fork 682 watcher
Born at : Feb. 20, 2022, 6:43 a.m. This repo has been linked 405 different CVEs too.
Profile Photo
presentdaypresenttime/shai_hulud

Worm written in python, abuses CVE-2020-7247

Python Shell

Updated: 1 year, 2 months ago
2 stars 1 fork 1 watcher
Born at : Feb. 7, 2022, 10:59 a.m. This repo has been linked 1 different CVEs too.
Profile Photo
SimonSchoeni/CVE-2020-7247-POC

Proof of concept for CVE-2020-7247 for educational purposes.

Shell Python

Updated: 1 year, 2 months ago
2 stars 0 fork 0 watcher
Born at : Nov. 26, 2021, 5:28 p.m. This repo has been linked 1 different CVEs too.
Profile Photo
f4T1H21/CVE-2020-7247

PoC exploit for CVE-2020-7247 OpenSMTPD 6.4.0 < 6.6.1 Remote Code Execution

exploit cve-2020-7247 cve poc

Python

Updated: 3 years, 3 months ago
1 stars 0 fork 0 watcher
Born at : June 19, 2021, 7:34 a.m. This repo has been linked 1 different CVEs too.

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2020-7247 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2020-7247 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • Modified Analysis by [email protected]

    Jul. 16, 2024

    Action Type Old Value New Value
    Changed Reference Type http://packetstormsecurity.com/files/156145/OpenSMTPD-6.6.2-Remote-Code-Execution.html Third Party Advisory, VDB Entry http://packetstormsecurity.com/files/156145/OpenSMTPD-6.6.2-Remote-Code-Execution.html Exploit, Third Party Advisory, VDB Entry
    Changed Reference Type http://packetstormsecurity.com/files/162093/OpenBSD-OpenSMTPD-6.6-Remote-Code-Execution.html Broken Link http://packetstormsecurity.com/files/162093/OpenBSD-OpenSMTPD-6.6-Remote-Code-Execution.html Broken Link, Third Party Advisory, VDB Entry
    Changed Reference Type http://seclists.org/fulldisclosure/2020/Jan/49 Mailing List, Third Party Advisory http://seclists.org/fulldisclosure/2020/Jan/49 Exploit, Mailing List, Third Party Advisory
    Changed Reference Type https://github.com/openbsd/src/commit/9dcfda045474d8903224d175907bfc29761dcb45 Patch, Third Party Advisory https://github.com/openbsd/src/commit/9dcfda045474d8903224d175907bfc29761dcb45 Patch
    Changed Reference Type https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OPH4QU4DNVHA7ACFXMYFCEP5PSXXPN4E/ No Types Assigned https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OPH4QU4DNVHA7ACFXMYFCEP5PSXXPN4E/ Mailing List, Third Party Advisory
    Changed Reference Type https://www.debian.org/security/2020/dsa-4611 Third Party Advisory https://www.debian.org/security/2020/dsa-4611 Mailing List, Third Party Advisory
  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • CVE Modified by [email protected]

    Nov. 07, 2023

    Action Type Old Value New Value
    Added Reference MITRE https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OPH4QU4DNVHA7ACFXMYFCEP5PSXXPN4E/ [No types assigned]
    Removed Reference MITRE https://lists.fedoraproject.org/archives/list/[email protected]/message/OPH4QU4DNVHA7ACFXMYFCEP5PSXXPN4E/
  • Modified Analysis by [email protected]

    Apr. 29, 2022

    Action Type Old Value New Value
    Changed Reference Type http://packetstormsecurity.com/files/156145/OpenSMTPD-6.6.2-Remote-Code-Execution.html Third Party Advisory http://packetstormsecurity.com/files/156145/OpenSMTPD-6.6.2-Remote-Code-Execution.html Third Party Advisory, VDB Entry
    Changed Reference Type http://packetstormsecurity.com/files/156249/OpenSMTPD-MAIL-FROM-Remote-Code-Execution.html No Types Assigned http://packetstormsecurity.com/files/156249/OpenSMTPD-MAIL-FROM-Remote-Code-Execution.html Exploit, Third Party Advisory, VDB Entry
    Changed Reference Type http://packetstormsecurity.com/files/156295/OpenSMTPD-6.6.1-Local-Privilege-Escalation.html No Types Assigned http://packetstormsecurity.com/files/156295/OpenSMTPD-6.6.1-Local-Privilege-Escalation.html Exploit, Third Party Advisory, VDB Entry
    Changed Reference Type http://packetstormsecurity.com/files/162093/OpenBSD-OpenSMTPD-6.6-Remote-Code-Execution.html No Types Assigned http://packetstormsecurity.com/files/162093/OpenBSD-OpenSMTPD-6.6-Remote-Code-Execution.html Broken Link
    Changed Reference Type http://seclists.org/fulldisclosure/2020/Jan/49 No Types Assigned http://seclists.org/fulldisclosure/2020/Jan/49 Mailing List, Third Party Advisory
    Changed Reference Type https://lists.fedoraproject.org/archives/list/[email protected]/message/OPH4QU4DNVHA7ACFXMYFCEP5PSXXPN4E/ No Types Assigned https://lists.fedoraproject.org/archives/list/[email protected]/message/OPH4QU4DNVHA7ACFXMYFCEP5PSXXPN4E/ Mailing List, Third Party Advisory
    Changed Reference Type https://seclists.org/bugtraq/2020/Jan/51 Third Party Advisory https://seclists.org/bugtraq/2020/Jan/51 Mailing List, Third Party Advisory
    Changed Reference Type https://usn.ubuntu.com/4268-1/ No Types Assigned https://usn.ubuntu.com/4268-1/ Third Party Advisory
    Changed Reference Type https://www.kb.cert.org/vuls/id/390745 No Types Assigned https://www.kb.cert.org/vuls/id/390745 Third Party Advisory, US Government Resource
    Added CPE Configuration OR *cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*
    Added CPE Configuration OR *cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* *cpe:2.3:o:canonical:ubuntu_linux:19.10:*:*:*:*:*:*:*
  • CWE Remap by [email protected]

    Jul. 21, 2021

    Action Type Old Value New Value
    Changed CWE CWE-252 CWE-755 CWE-78
  • CVE Modified by [email protected]

    Apr. 06, 2021

    Action Type Old Value New Value
    Added Reference http://packetstormsecurity.com/files/162093/OpenBSD-OpenSMTPD-6.6-Remote-Code-Execution.html [No Types Assigned]
  • CVE Modified by [email protected]

    Mar. 17, 2020

    Action Type Old Value New Value
    Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/OPH4QU4DNVHA7ACFXMYFCEP5PSXXPN4E/ [No Types Assigned]
  • CVE Modified by [email protected]

    Feb. 11, 2020

    Action Type Old Value New Value
    Added Reference https://usn.ubuntu.com/4268-1/ [No Types Assigned]
  • CVE Modified by [email protected]

    Feb. 11, 2020

    Action Type Old Value New Value
    Added Reference http://packetstormsecurity.com/files/156295/OpenSMTPD-6.6.1-Local-Privilege-Escalation.html [No Types Assigned]
  • CVE Modified by [email protected]

    Feb. 07, 2020

    Action Type Old Value New Value
    Added Reference http://packetstormsecurity.com/files/156249/OpenSMTPD-MAIL-FROM-Remote-Code-Execution.html [No Types Assigned]
  • CVE Modified by [email protected]

    Feb. 01, 2020

    Action Type Old Value New Value
    Added Reference http://seclists.org/fulldisclosure/2020/Jan/49 [No Types Assigned]
  • CVE Modified by [email protected]

    Jan. 31, 2020

    Action Type Old Value New Value
    Added Reference https://www.kb.cert.org/vuls/id/390745 [No Types Assigned]
  • Initial Analysis by [email protected]

    Jan. 31, 2020

    Action Type Old Value New Value
    Added CVSS V2 NIST (AV:N/AC:L/Au:N/C:C/I:C/A:C)
    Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
    Changed Reference Type http://packetstormsecurity.com/files/156137/OpenBSD-OpenSMTPD-Privilege-Escalation-Code-Execution.html No Types Assigned http://packetstormsecurity.com/files/156137/OpenBSD-OpenSMTPD-Privilege-Escalation-Code-Execution.html Exploit, Third Party Advisory, VDB Entry
    Changed Reference Type http://packetstormsecurity.com/files/156145/OpenSMTPD-6.6.2-Remote-Code-Execution.html No Types Assigned http://packetstormsecurity.com/files/156145/OpenSMTPD-6.6.2-Remote-Code-Execution.html Third Party Advisory
    Changed Reference Type http://www.openwall.com/lists/oss-security/2020/01/28/3 No Types Assigned http://www.openwall.com/lists/oss-security/2020/01/28/3 Exploit, Mailing List, Third Party Advisory
    Changed Reference Type https://github.com/openbsd/src/commit/9dcfda045474d8903224d175907bfc29761dcb45 No Types Assigned https://github.com/openbsd/src/commit/9dcfda045474d8903224d175907bfc29761dcb45 Patch, Third Party Advisory
    Changed Reference Type https://seclists.org/bugtraq/2020/Jan/51 No Types Assigned https://seclists.org/bugtraq/2020/Jan/51 Third Party Advisory
    Changed Reference Type https://www.debian.org/security/2020/dsa-4611 No Types Assigned https://www.debian.org/security/2020/dsa-4611 Third Party Advisory
    Changed Reference Type https://www.openbsd.org/security.html No Types Assigned https://www.openbsd.org/security.html Patch, Vendor Advisory
    Added CWE NIST CWE-252
    Added CPE Configuration OR *cpe:2.3:a:openbsd:opensmtpd:6.6:*:*:*:*:*:*:*
    Added CPE Configuration OR *cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* *cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
  • CVE Modified by [email protected]

    Jan. 30, 2020

    Action Type Old Value New Value
    Added Reference http://packetstormsecurity.com/files/156145/OpenSMTPD-6.6.2-Remote-Code-Execution.html [No Types Assigned]
  • CVE Modified by [email protected]

    Jan. 30, 2020

    Action Type Old Value New Value
    Added Reference https://www.debian.org/security/2020/dsa-4611 [No Types Assigned]
  • CVE Modified by [email protected]

    Jan. 30, 2020

    Action Type Old Value New Value
    Added Reference https://seclists.org/bugtraq/2020/Jan/51 [No Types Assigned]
  • CVE Modified by [email protected]

    Jan. 29, 2020

    Action Type Old Value New Value
    Added Reference http://packetstormsecurity.com/files/156137/OpenBSD-OpenSMTPD-Privilege-Escalation-Code-Execution.html [No Types Assigned]
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2020-7247 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2020-7247 weaknesses.

Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

97.52 }} 0.02%

score

0.99993

percentile

CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
: