CVE-2024-22086
📋 TL;DR
CVE-2024-22086 is a critical stack-based buffer overflow vulnerability in cherry's HTTP request handler that allows remote attackers to execute arbitrary code by sending specially crafted long URIs. This affects all cherry deployments through version 4b877df. Any system running vulnerable cherry versions with HTTP services exposed is at risk of complete compromise.
💻 Affected Systems
- cherry
📦 What is this software?
Cherry by Hayyp
⚠️ Risk & Real-World Impact
Worst Case
Remote unauthenticated attacker gains full system control, installs persistent backdoors, exfiltrates sensitive data, and pivots to other systems in the network.
Likely Case
Remote code execution leading to service disruption, data theft, and potential lateral movement within the network.
If Mitigated
Denial of service or application crash if buffer overflow protections are in place, but RCE prevented.
🎯 Exploit Status
Public GitHub issue demonstrates the vulnerability with example exploit code. Simple HTTP request with long URI triggers the overflow.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Versions after commit 4b877df
Vendor Advisory: https://github.com/hayyp/cherry/issues/1
Restart Required: Yes
Instructions:
1. Update cherry to latest version after commit 4b877df. 2. Replace vulnerable http.c with patched version. 3. Restart cherry service. 4. Verify fix by testing with long URI requests.
🔧 Temporary Workarounds
URI Length Restriction
allImplement web server or proxy restrictions on maximum URI length
nginx: 'client_max_body_size 1k;' in location block
apache: 'LimitRequestLine 1024' in config
Network Segmentation
linuxRestrict access to cherry HTTP ports using firewall rules
iptables -A INPUT -p tcp --dport [cherry_port] -s [trusted_ips] -j ACCEPT
iptables -A INPUT -p tcp --dport [cherry_port] -j DROP
🧯 If You Can't Patch
- Deploy WAF with buffer overflow protection rules to block malicious long URIs
- Isolate vulnerable systems in separate network segments with strict access controls
🔍 How to Verify
Check if Vulnerable:
Check cherry version/git commit hash. If at or before 4b877df, system is vulnerable.Check Version:
cherry --version or check git commit hash in sourceVerify Fix Applied:
Test with curl sending long URI: 'curl -v "http://target/$(python3 -c 'print("A"*2000)')"' - should not crash service.📡 Detection & Monitoring
Log Indicators:
- HTTP requests with unusually long URIs (>1024 chars)
- cherry process crashes/restarts
- segmentation fault errors in logs
Network Indicators:
- HTTP GET requests with URI length exceeding normal bounds
- Multiple rapid long URI requests from single source
SIEM Query:
source="cherry.log" AND (uri_length>1024 OR "segmentation fault" OR "buffer overflow")