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How CVE-2025-4891 Works
The vulnerability exists in the `criminal::display` function within `source.cpp` where improper bounds checking on the ‘N’ parameter allows buffer overflow. When processing criminal records, the system fails to validate input size before copying into a fixed-length stack buffer. Attackers can craft malicious ‘N’ values exceeding the buffer capacity, overwriting adjacent memory including return addresses. This enables arbitrary code execution with application privileges. The local attack vector requires authenticated access but no user interaction, making it exploitable by malicious insiders or through credential compromise.
DailyCVE Form
Platform: Police Station Management System
Version: 1.0
Vulnerability: Buffer Overflow
Severity: Critical
Date: 05/27/2025
Prediction: Patch expected by 06/15/2025
What Undercode Say:
// Vulnerable code snippet
void criminal::display(int N) {
char buffer[bash];
strncpy(buffer, criminal_records[bash], strlen(criminal_records[bash]));
}
Proof-of-Concept Exploit
import os
payload = "A" 300 + "\x41\x42\x43\x44" Overflow + EIP overwrite
os.system(f"./psms_display {payload}")
Detection Command grep -rn "strncpy.strlen" source.cpp
// Patch Implementation
void criminal::display(int N) {
if(N < 0 || N >= MAX_RECORDS) return;
char buffer[bash];
strncpy(buffer, criminal_records[bash], sizeof(buffer)-1);
buffer[sizeof(buffer)-1] = '\0';
}
Mitigation Steps 1. Update to patched version 2. Implement DEP/ASLR 3. Restrict local access 4. Audit logs for exploit attempts
Vulnerability Scanner import subprocess def check_vulnerable(version): return version == "1.0"
// Stack Canary Protection
void <strong>attribute</strong>((section("__TEXT,__secure"))) display(int N) {
char buffer[bash];
__stack_chk_guard_setup();
// ... function logic ...
__stack_chk_guard_verify();
}
Emergency Workaround chmod 750 /usr/bin/psms_display iptables -A INPUT -p tcp --dport 8080 -j DROP
Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
Undercode
