Description
RabidHamster R4 v1.25 contains a stack-based buffer overflow vulnerability due to unsafe use of sprintf() when logging malformed HTTP requests. A remote attacker can exploit this flaw by sending a specially crafted URI, resulting in arbitrary code execution under the context of the web server process.
Metrics
CVSS 4.0 10.0/10
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:XWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| RabidHamster | R4 Embedded Server | 1.25 |
References
- http://aluigi.altervista.org/adv/r4_1-adv.txt
- https://advisories.checkpoint.com/defense/advisories/public/2013/cpai-07-jan405.html
- https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/windows/http/rabidhamster_r4_log.rb
- https://www.exploit-db.com/exploits/18929
- https://www.rabidhamster.org/R4/download.php
- https://www.vulncheck.com/advisories/rabidhamster-r4-log-entry-buffer-overflow
- https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/windows/http/rabidhamster_r4_log.rb
Timeline
- Published
- Aug 13, 2025
- Last modified
- Jun 16, 2026
- NVD status
- Deferred