CVE-2025-62515
📋 TL;DR
This vulnerability allows remote attackers to execute arbitrary code on systems running vulnerable versions of pyquokka by sending malicious pickled payloads through the FlightServer interface. Attackers can achieve full system compromise when the server listens on 0.0.0.0, affecting all organizations using pyquokka versions 0.3.1 and earlier for time series data lake operations.
💻 Affected Systems
- pyquokka
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Complete system takeover with attacker gaining root/administrator privileges, data exfiltration, ransomware deployment, and persistent backdoor installation.
Likely Case
Remote code execution leading to data theft, service disruption, and lateral movement within the network.
If Mitigated
Limited impact if proper network segmentation and access controls prevent external access to vulnerable services.
🎯 Exploit Status
Exploitation requires sending specially crafted pickled payloads to vulnerable endpoints. Public advisory includes technical details sufficient for exploitation.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 0.3.2 or later
Vendor Advisory: https://github.com/marsupialtail/quokka/security/advisories/GHSA-f74j-gffq-vm9p
Restart Required: Yes
Instructions:
1. Upgrade pyquokka to version 0.3.2 or later using pip install --upgrade pyquokka. 2. Restart all pyquokka services. 3. Verify the patch by checking the version and ensuring pickle.loads() is no longer used with untrusted data.
🔧 Temporary Workarounds
Network Access Restriction
linuxRestrict network access to pyquokka FlightServer to trusted IP addresses only using firewall rules.
iptables -A INPUT -p tcp --dport <pyquokka_port> -s <trusted_ip> -j ACCEPT
iptables -A INPUT -p tcp --dport <pyquokka_port> -j DROP
Disable FlightServer
allDisable the vulnerable FlightServer component if not required for operations.
Modify configuration to disable FlightServer or stop the service
🧯 If You Can't Patch
- Implement strict network segmentation to isolate pyquokka servers from untrusted networks.
- Deploy application-level firewalls or WAF rules to block pickle payloads to vulnerable endpoints.
🔍 How to Verify
Check if Vulnerable:
Check pyquokka version with pip show pyquokka and verify if version is 0.3.1 or earlier. Also check if FlightServer is running and accessible.Check Version:
pip show pyquokka | grep VersionVerify Fix Applied:
Verify pyquokka version is 0.3.2 or later and test that pickle.loads() is no longer accepting untrusted input in the vulnerable functions.📡 Detection & Monitoring
Log Indicators:
- Unusual pickle deserialization errors
- Unexpected process spawns from pyquokka
- Network connections to pyquokka from untrusted sources
Network Indicators:
- Pickle payloads sent to pyquokka FlightServer ports
- Unusual outbound connections from pyquokka servers
SIEM Query:
source="pyquokka" AND (event="pickle.loads" OR process="python" AND cmdline="*pickle*")