Linux Archives - Page 4 of 19

12 Apr, 2025

Hack The Box: LinkVortex Machine Walkthrough Easy Difficulty

Easy Machine BurpSuite, Challenges, CVE-2023-40028, GhostCMS, GitDumper, HackTheBox, Linux, Local File Inclusion, Penetration Testing, ssh, SudoMisconfiguration

Successfully demonstrated advanced cybersecurity skills by exploiting a Ghost CMS vulnerability (CVE-2023-40028) to access sensitive credentials and secure the user flag. Identified and leveraged a sudo misconfiguration with the CHECK_CONTENT variable to escalate privileges and retrieve the root flag from /root/root.txt. Thrived in this hands-on challenge, sharpening penetration testing expertise! #HackTheBox #Cybersecurity #EthicalHacking #PenetrationTesting #CTF …

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5 Apr, 2025

Hack The Box: Ghost Machine Walkthrough – Insane Difficulty

Insane Machine adfs abuse attack, ADFSDump, ADFSSpoof, Bloodhound, BloodHoundCE, BurpSuite, Challenges, command injection, docker, efspotatoo, evil-winrm, Gitea, HackTheBox, hashcat, JokerShell, kerberos, LFI, Linux, mimkatz, Penetration Testing, responder, rubeus.exe, SQL, ssh

The initial foothold was gained by exploiting command injection on intranet.ghost.htb:8008/api-dev/scan/, which provided a reverse shell inside a Docker container. From there, I enumerated the environment and discovered credentials that allowed SSH access as Florence Ramirez. By extracting and converting a Kerberos ticket, I authenticated as a legitimate user, escalating access within the system. With access to the Windows environment, I retrieved NTLM hashes for the adfs_gmsa account and leveraged evil-winrm for lateral movement. A reverse shell was established using JokerShell, and privileges were escalated by enabling xp_cmdshell through a debug interface. After uploading EfsPotato.cs and disabling antivirus, I used Mimikatz and Rubeus.exe to dump credentials, ultimately achieving SYSTEM access. This led to the extraction of domain admin credentials and the retrieval of the root flag. Another Insane box down! 💀💻

#HackTheBox #RedTeam #CyberSecurity #PenTesting #PrivilegeEscalation #EthicalHacking …

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29 Mar, 2025

Hack The Box: BlockBlock Machine Walkthrough – Hard Difficulty

Hard Machine Authentication Bypass, BurpSuite, Challenges, Ethereum Classic Exploit, Forge Binary Privilege Escalation, HackTheBox, JSON-RPC Vulnerability, JWT Token Extraction, Linux, Pacman Package Manager Misconfiguration, Penetration Testing, ssh, XSS Attack

This walkthrough examines the BlockBlock machine from Hack The Box, classified as a medium-difficulty challenge. The assessment began with the exploitation of an XSS vulnerability, which facilitated credential theft through the Ethereum JSON-RPC API, granting SSH access. Privilege escalation was achieved by leveraging the forge binary to obtain higher privileges, followed by exploiting a misconfigured pacman package manager to gain root access. This engagement underscores the critical importance of securing APIs, implementing robust input validation, and enforcing strict privilege escalation controls to mitigate security risks.

#HackTheBox #CyberSecurity #PenetrationTesting #CTF #EthicalHacking #XSS #PrivilegeEscalation #BlockchainSecurity …

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22 Mar, 2025

Hack The Box: Alert Machine Walkthrough – Easy Difficulty

Easy Machine Apache, Challenges, HackTheBox, hashcat, hashid, Linux, Markdown, Penetration Testing, port forwarding, pwncat-cs, python3, XSS

We discovered an XSS vulnerability in .md file uploads and the Contacts tab. By embedding an XSS payload and sharing the link, we extracted data from messages.php, revealing a file parameter vulnerable to LFI. This led us to /var/www/statistics.alert.htb/.htpasswd, which contained a hashed password. Using hashid, we identified it as MD5 (APR1-MD5) and cracked it with Hashcat, retrieving the password ManchesterUnited. With these credentials, we accessed the system and captured the user flag.

After logging into statistics.alert.htb, we found port 8080 open. Using SSH port forwarding, we accessed a monitoring site but needed to locate its directory. Checking ps aux, we found it in /opt/website-monitor. We confirmed file access by testing a basic PHP file, which worked. We then uploaded a PentestMonkey reverse shell, but it didn’t execute. To ensure success, we crafted a reliable PHP shell, triggered it, and gained root access.

🔍 #CyberSecurity #BugBounty #EthicalHacking #PenTesting #CTF #HTB #WebSecurity #XSS #LFI #PrivilegeEscalation #Hacking …

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8 Mar, 2025

Hack The Box: Chemistry Machine Walkthrough – Easy Difficulty

Easy Machine BurpSuite, Challenges, CIF, Crystallographic Information File (CIF), CVE-2024-23346, HackTheBox, Linux, Penetration Testing, sqlite3

A vulnerability in **Pymatgen (CVE-2024-23346)** allowed for **Remote Code Execution (RCE)** through a **malicious CIF file**. By injecting code into the **_space_group_magn.transform_BNS_Pp_abc** field and uploading it to the dashboard, nothing happened initially. However, clicking the **View button** triggered execution, leading to a **reverse shell**. With remote access secured, an **SQLite3 database** was explored, revealing **password hashes**, which were cracked to obtain valid credentials and retrieve the **user flag**.

Further exploration uncovered an **aiohttp/3.9.1** service running on **port 8080**, restricting access to the **assets directory** with a **403 Forbidden** response. Leveraging an **LFI attack**, an **SSH key** was extracted, allowing for **privilege escalation** and access to the **root flag**.

This scenario highlights the importance of **sanitizing file uploads, restricting directory access, and keeping dependencies updated** to mitigate security risks.

#CyberSecurity #BugBounty #EthicalHacking #PrivilegeEscalation #RedTeam #WebSecurity #InfoSec #CTF …

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