CVE-2024-53857
📋 TL;DR
CVE-2024-53857 is a resource exhaustion vulnerability in rPGP, a pure Rust OpenPGP implementation. Attackers can craft malicious messages to cause denial of service through excessive resource consumption. This affects all users parsing OpenPGP messages or decrypting with symmetric keys using vulnerable rPGP versions.
💻 Affected Systems
- rPGP (Rust OpenPGP implementation)
⚠️ 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 service unavailability due to resource exhaustion (CPU/memory), potentially leading to system crashes or extended downtime.
Likely Case
Degraded performance or temporary service interruptions when processing malicious OpenPGP messages.
If Mitigated
Minimal impact with proper input validation and resource limits in place.
🎯 Exploit Status
Exploitation requires ability to submit crafted messages to vulnerable systems. No authentication needed for message parsing.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 0.14.1
Vendor Advisory: https://github.com/rpgp/rpgp/security/advisories/GHSA-4grw-m28r-q285
Restart Required: Yes
Instructions:
1. Update rPGP dependency to version 0.14.1 or later. 2. Update Cargo.toml: rpgp = "^0.14.1". 3. Run 'cargo update'. 4. Rebuild and redeploy applications. 5. Restart affected services.
🔧 Temporary Workarounds
Input validation and rate limiting
allImplement strict input validation and rate limiting for OpenPGP message processing
Resource limits
linuxSet CPU and memory limits on processes using rPGP to contain resource exhaustion
ulimit -v 1048576
systemctl set-property service_name CPUQuota=50%
🧯 If You Can't Patch
- Implement network-level filtering to block or rate limit OpenPGP message traffic from untrusted sources
- Deploy monitoring for resource exhaustion patterns and implement automated response for abnormal resource usage
🔍 How to Verify
Check if Vulnerable:
Check Cargo.lock or Cargo.toml for rpgp dependency version below 0.14.1Check Version:
cargo tree | grep rpgpVerify Fix Applied:
Confirm rpgp version is 0.14.1 or higher in Cargo.lock: grep -A2 -B2 rpgp Cargo.lock📡 Detection & Monitoring
Log Indicators:
- Abnormal CPU/memory spikes during message parsing
- Process crashes or restarts during OpenPGP operations
- Increased error rates in OpenPGP processing
Network Indicators:
- Unusually large OpenPGP messages
- High volume of OpenPGP message traffic from single sources
SIEM Query:
source="application_logs" AND ("rpgp" OR "OpenPGP") AND ("high_cpu" OR "out_of_memory" OR "process_crash")