Skip to main content

SMTP Enumeration (25)


SMTP user enumeration script

#!/bin/bash

if [ "$#" -ne 2 ]; then
echo "Usage: $0 <username> <ip>"
exit 1
fi

ip="$2"
username="$1"

# Check if netcat (nc) is installed
if ! command -v nc &> /dev/null; then
echo "netcat (nc) is not installed. Please install it before running this script."
exit 1
fi

# Connect to the SMTP server and send VRFY command
result=$(echo -e "VRFY $username\r\n" | nc -n -w 5 $ip 25)

# Print the result
echo "$result"

SEND email using netcat

nc -C example.com 25
HELO <attackers domain> # ex. hacker.com
MAIL FROM:<attacker email> # bad@hacker.com
RCPT TO:<victims email>
DATA
From: <attacker email>
To: <victim email>
Subject: <subject>
Date: Fri , 20 Jan 2023 10:00:00 +0000

<Email body>

.

Sendind a phising email

sudo swaks -t <TARGET EMAIL> --from <SENDER EMAIL> \
--attach @<ATTACHED FILE> --server <SMTP ADDRESS> --body @<BODY.txt FILE> \
--header "<HEADER>" --suppress-data -ap

#ex. sudo swaks -t john@mail.com -t jane@mail.com
#--from cfo@mail.com --attach @payrolls.xls --server 192.168.1.2
#--body @body.txt --header "Subject: Monthly Payrolls" --suppress-data -ap

Popular posts from this blog

Open eClass – CVE-2024-26503: Unrestricted File Upload Leads to Remote Code Execution

During an assessment, I identified a severe security vulnerability within Open eClass, an e-learning platform extensively utilized across educational institutions, notably within Greece, where it is deployed by virtually all Greek Universities and educational entities. Open eClass, developed by GUnet (Greek Universities Network), is instrumental in delivering asynchronous e-learning services. The vulnerability, cataloged under CVE-2024-26503, involves an unrestricted file upload flaw that enables remote code execution (RCE), impacting versions 3.15 and earlier of the platform. This critical security lapse presents a significant risk, potentially allowing unauthorized access and control over the system, thereby compromising the integrity and security of the educational infrastructure. Affected Versions: ●   version <=  3.15 CVSSv3.1 Base Score: 9.1 ( Critical ) CVSSv3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H Exploitation Guide The vulnerability can be exploited

How I Use Obsidian for Penetration Testing, CVE Hunting, and Studying

In the ever-evolving realm of cyber security, the tools and techniques at our disposal are as varied as the threats we aim to counteract. Among these tools, note-taking applications play a pivotal role, not just in organizing our thoughts but in streamlining our entire workflow. Today, I'm excited to share how Obsidian, a tool I embraced over two and a half years ago while preparing for my eJPT exam, has become an indispensable ally in my journey through penetration testing, CVE hunting, and continuous learning. If you're not yet familiar with Obsidian, it's a robust note-taking application that operates on a local collection of plain text Markdown files. What sets it apart is its capability to interlink ideas, forming an expansive web of knowledge that is both intuitive and comprehensive to explore. Through considerable customization, I've developed what I consider to be an ideal method for consolidating notes, insights, and projects into a unified workspace. Here'

Chamilo LMS: CVE-2024-27524 & CVE-2024-27525

CVE-2024-27524:  Stored XSS in tickets Severity:  High  (Base Score  7.1 ) CVSS Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H   Mitigation: Upgrade to Chamilo LMS 1.11.28 and above. Patch:  https://github.com/chamilo/chamilo-lms/commit/53275c152275958b33a1f87a21843daa52fb543a CVE-2024-27525:  Self XSS in social network Base Score:  Medium  (Base Score  4.6 ) CVSS Vector:  CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:L Mitigation: Upgrade to Chamilo LMS 1.11.28 and above. Patch:  https://github.com/chamilo/chamilo-lms/commit/a63e03ef961e7bf2dab56f4ede6f87edef40ba0c Overview This advisory covers the discovery of two vulnerabilities within Chamilo LMS, an open-source learning management system (LMS) widely used across educational institutions. These vulnerabilities—stored cross-site scripting (Stored XSS) and self-cross-site scripting (Self XSS)—pose different levels of security risks but highlight critical considerations for secure system administration and user protection. Summary