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How CVE-2025-31213 Works
This vulnerability stems from improper data redaction in iCloud Keychain logs, allowing applications to access sensitive username and website associations stored in the keychain. When synchronization occurs between devices, debug logs inadvertently expose these credentials due to insufficient sanitization. Attackers can exploit this by:
1. Deploying a malicious app with enments to read system logs
2. Parsing unprotected log files containing keychain metadata
3. Reconstructing credential-website mappings for targeted phishing
The flaw affects macOS Ventura 13.x, Sonoma 14.x, Sequoia 15.x, and iPadOS 17.x before patched versions.
DailyCVE Form
Platform: Apple macOS/iOS
Version: Ventura 13.x, Sonoma 14.x, Sequoia 15.x, iPadOS 17.x
Vulnerability: Keychain data leak
Severity: Medium
Date: 05/27/2025
Prediction: Patch by 06/15/2025
What Undercode Say:
Log inspection command (pre-patch)
log show --predicate 'subsystem == "com.apple.security.keychain"' --last 1h
Exploit PoC (sanitized)
import os
def extract_keychain_logs():
return os.popen('grep -r "keychain" /var/log/system.log').read()
Mitigation commands
sudo chmod 640 /var/log/system.log
sudo chmod 750 /var/log/.log
AppleScript detection
tell application "System Events"
if exists file "/Library/Keychains/.debug" then
display alert "CVE-2025-31213 detected"
end if
end tell
Network protection
sudo pfctl -f /etc/pf.conf
block in log quick from any to any port 443
Log redaction script
sed -i 's/(website=).(&user)/\1REDACTED\2/g' /var/log/keychain.log
Kernel-level protection
sysctl -w kern.dmesg_restrict=1
sysctl -w kern.info_redaction=1
Post-exploit detection
sudo auditreduce -m /var/log/audit.log | praudit -l | grep keychain
MobileConfig payload
<?xml version="1.0"?>
<plist>
<dict>
<key>PayloadContent</key>
<dict>
<key>RestrictKeychainLogging</key>
<true/>
</dict>
</dict>
</plist>
Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
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