ExploitPublished 9 Jun 2025

ProSSHD 1.2 20090726 · Denial of Service (DoS)

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Mentioned vulnerabilities

CVE-2024-0725

Severity

Medium

Rated by Threat Radar

Data as of 15 Jun 2025, 05:35 UTC

What to do

AI-suggested

1. Upgrade or patch: Organizations should verify if updated versions of ProSSHD are available that address this vulnerability and apply them promptly. 2. Credential security: Enforce strong password policies and implement multi-factor authentication to reduce the risk of credential compromise, as the exploit requires valid credentials. 3. Network segmentation: Restrict SSH access to trusted networks and known IP addresses using firewalls or VPNs to limit exposure. 4. Monitoring and alerting: Implement monitoring for unusual SCP or SSH session behaviors, including large or malformed SCP requests, and set up alerts for repeated connection attempts or failures. 5. Incident response planning: Prepare for potential DoS incidents by establishing recovery procedures and backup access methods to critical systems. 6. Access control: Limit the number of users with SCP or SSH access and regularly review access rights. 7. Use of intrusion prevention systems (IPS): Deploy IPS solutions capable of detecting and blocking malformed SCP payloads or abnormal SSH traffic patterns associated with this exploit.

Description

ProSSHD 1.2 20090726 - Denial of Service (DoS)

Impact

For European organizations, the primary impact of this vulnerability is service disruption. Organizations relying on ProSSHD 1.2 for secure remote access or file transfers could experience outages or degraded service availability if targeted. This can affect operational continuity, especially for critical infrastructure or services that depend on SSH for administration or automation. Although the vulnerability does not directly compromise data confidentiality or integrity, the denial of service could indirectly impact business processes, incident response, and recovery times. Given that valid credentials are required, the threat is more significant if credential compromise or weak password policies exist. The disruption could also be exploited as part of a broader attack strategy, such as distracting security teams or creating windows for other attacks. European sectors with high reliance on Windows-based SSH servers, such as manufacturing, finance, or government agencies, may face increased risk. The lack of known exploits in the wild reduces immediate risk but does not eliminate the threat, especially as exploit code is publicly available.

Indicators of compromise

Exploit source code

Exploit code for ProSSHD 1.2 20090726 - Denial of Service (DoS)1,484 characters

# Exploit Title: ProSSHD 1.2 20090726 - Denial of Service (DoS)
# Google Dork: N/A
# Date: 13 january 2024
# Exploit Author: Fernando Mengali
# Vendor Homepage: https://prosshd.com/
# Software Link: N/A
# Version: 1.2 20090726
# Tested on: Windows XP
# CVE: CVE-2024-0725

    $sis="$^O";

    if ($sis eq "windows"){
      $cmd="cls";
    } else {s
      $cmd="clear";
    }

    system("$cmd");
    
    intro();
    main();

print "\t    ==> Connecting to webserver... \n\n";
sleep(1);

my $i=0;
 …

References

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