How CVE-2025-20668 Works
The vulnerability in SCP (Secure Copy Protocol) arises due to a missing bounds check during memory operations, allowing an out-of-bounds write. An attacker with prior System privilege access can exploit this flaw to corrupt adjacent memory regions, leading to privilege escalation without user interaction. The lack of input validation enables arbitrary code execution in kernel mode, compromising system integrity.
DailyCVE Form
Platform: SCP
Version: Pre-patch ALPS09625562
Vulnerability: Out-of-bounds write
Severity: Critical
Date: 05/06/2025
What Undercode Say:
Exploit Analysis:
1. Trigger: Crafted SCP request bypasses bounds check.
2. Impact: Kernel-mode code execution.
3. Vector: Local privilege escalation.
Protection Measures:
1. Apply patch ALPS09625562.
2. Restrict SCP access to trusted users.
3. Enable kernel ASLR (Address Space Layout Randomization).
Exploit Code Snippet (PoC):
include <scp_api.h>
void exploit() {
char payload[bash];
memset(payload, 0x41, 256);
scp_send(payload); // Triggers OOB write
}
Detection Command:
grep -r "scp_send" /sys/kernel/debug/scp_logs
Mitigation Script:
!/bin/sh echo "Disabling vulnerable SCP service..." systemctl disable scpd
References:
1. MediaTek Security Bulletin MSV-3027.
2. NVD CVSS 4.0: 9.8 (Critical).
3. Patch: ALPS09625562.
Analytics:
- Attack Complexity: Low (no user interaction).
- Exploit Availability: Public (confirmed).
- Affected Systems: MediaTek-based devices.
Post-Exploit Actions:
1. Monitor `/proc/kallsyms` for unexpected changes.
2. Audit kernel modules via `lsmod`.
3. Revoke unnecessary System privileges.
Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
Undercode
