PentesterLab
@PentesterLab

We make learning web hacking and security easier. Online systems, code review, videos & courses that can be used to understand, test and exploit bugs!

 Melbourne, Victoria
pentesterlab.com/
Joined December 2011
💥🐹 4 new Go Code Review Labs just dropped! 🐹💥 Read the code, peek at the diff, find the bug. Sharpen your skills: pentesterlab.com/badges/gola…

PentesterLab: Learn with our Golang Code Review Badge

The Golang Code Review Badge is our badge dedicated to code review in Golang. It covers the discovery of weaknesses and vulnerabilities using source code review.

pentesterlab.com
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Our Black Friday Special is now live: pentesterlab.com/pro One-year: US$146.52 instead of US$199.99 Student (3-month): US$27.99 instead of US$34.99 Happy Hacking!

Advanced Web Hacking Labs and Security Code Review Training | PentesterLab PRO

Access advanced web hacking labs, in-depth video walkthroughs, and security code review training built around real vulnerabilities, exploitation techniques, and practical AppSec skills.

pentesterlab.com
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Time for another giveaway! We are going to send a t-shirt and a few goodies to one person who follows @PentesterLab and retweets this tweet !! And we are going to give a 12-month voucher to someone who follows @PentesterLab and likes this tweet !!
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Giveaway time! We are going to send a t-shirt and few goodies to one person who follows @PentesterLab and likes this tweet !! And we are going to give a 1-year voucher to someone who RT this tweet!
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Giveaway time! We are going to send a t-shirt and few goodies to one person who follows @PentesterLab and likes this tweet !! And we are going to give a 1-year voucher to someone who RT this tweet!
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Giveaway time! To celebrate 80k followers! We are going to give a 1-month voucher to **80** people who RT this tweet (picked randomly)! We are going to send our socks, t-shirt and few goodies to one person who follows @PentesterLab and likes this tweet (picked randomly)!!
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Giveaway time! We are going to send a t-shirt and few goodies to one person who follows @PentesterLab and likes this tweet !! And we are going to give a 1-year voucher to someone who RT this tweet!
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Thanks everyone for your support! Let's do it now! We will give away 140 x 1-month subscription. To enter you just need to interact with this tweet (like/RT/...)!
PentesterLab
@PentesterLab
13 Aug 2022
We were planning 70 x 1-month voucher for our 70k followers. We are going to double it (140 x 1-month) if we reach 70k followers before the end of Def Con!
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Giveaway time! We are going to send a t-shirt and few goodies to one person who follows @PentesterLab and likes this tweet !! And we are going to give a 1-year voucher to someone who RT this tweet!
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Giveaway time! We are going to send a t-shirt and few goodies to one person who follows @PentesterLab and likes this tweet !! And we are going to give a 1-year voucher to someone who RT this tweet!
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Time for another giveaway! We are going to send a t-shirt and a few goodies to one person who follows @PentesterLab and retweets this tweet!! And we are going to give a 12-month voucher to someone who follows @PentesterLab and likes this tweet!!
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Giveaway time! We are going to send a t-shirt and few goodies to one person who follows @PentesterLab and likes this tweet !! And we are going to give a 1-year voucher to someone who RT this tweet!
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Time for another giveaway! We are going to send a t-shirt and a few goodies to one person who follows @PentesterLab and retweets this tweet!! And we are going to give a 12-month voucher to someone who follows @PentesterLab and likes this tweet!!
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Time for another giveaway! We are going to send a t-shirt and a few goodies to one person who follows @PentesterLab and retweets this tweet!! And we are going to give a 12-month voucher to someone who follows @PentesterLab and likes this tweet!!
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Time for another giveaway! We are going to send a t-shirt and a few goodies to one person who follows @PentesterLab and retweets this tweet!! And we are going to give a 12-month voucher to someone who follows @PentesterLab and likes this tweet!!
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Giveaway time! To celebrate 60k followers! We are going to send our new socks and few goodies to one person who follows @PentesterLab and likes this tweet !! And we are going to give a 1-month voucher to **60** people who RT this tweet!
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🍾🪩🪅🎉🥳Giveaway time! 🥳🎉🪅🪩🍾 We are going to send a t-shirt and few goodies to one person who follows @PentesterLab and likes this tweet !! And we are going to give a 1-year voucher to someone who RT this tweet!
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Giveaway time! We are going to send a t-shirt and few goodies to one person who follows @PentesterLab and likes this tweet !! And we are going to give a 1-year voucher to someone who RT this tweet!
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Time for another giveaway! We are going to send a t-shirt and a few goodies to one person who follows @PentesterLab and retweets this tweet!! And we are going to give a 12-month voucher to someone who follows @PentesterLab and likes this tweet!!
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Time for another giveaway! We are going to send a t-shirt and a few goodies to one person who follows @PentesterLab and retweets this tweet!! And we are going to give a 12-month voucher to someone who follows @PentesterLab and likes this tweet!!
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Giveaway time! To celebrate 50k followers! We are going to send a t-shirt and few goodies to one person who follows @PentesterLab and likes this tweet !! And we are going to give a 1-month voucher to **50** people who RT this tweet!
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Time for another giveaway! We are going to send a t-shirt and a few goodies to one person who follows @PentesterLab and retweets this tweet!! And we are going to give a 12-month voucher to someone who follows @PentesterLab and likes this tweet!!
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Time for another giveaway! We are going to send a t-shirt and a few goodies to one person who follows @PentesterLab and retweets this tweet!! And we are going to give a 12-month voucher to someone who follows @PentesterLab and likes this tweet!!
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10 more sleeps before our BLACK FRIDAY SPECIAL! Let's do a Giveaway in the meantime! We are going to: * Send a swag pack to one person who follows @PentesterLab and RT this tweet!! * Give 12-month voucher to someone who follows @PentesterLab and ♥️ this tweet!!
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Ok, let's try to do a swag giveaway. We are going to send a t-shirt and few goodies to one person who follows @PentesterLab and likes this tweet !!
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Black Friday Giveaway! Make sure you check our deals: pentesterlab.com/pro We are going to send a t-shirt and a few goodies to one person who retweets this tweet!! And we are going to give a 12-month voucher to someone who follows @PentesterLab and likes this tweet!!

Advanced Web Hacking Labs and Security Code Review Training | PentesterLab PRO

Access advanced web hacking labs, in-depth video walkthroughs, and security code review training built around real vulnerabilities, exploitation techniques, and practical AppSec skills.

pentesterlab.com
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Another giveaway! We are going to send a t-shirt and a few goodies (including socks) to one person who follows @PentesterLab and retweets this tweet !! And we are going to give a 12-month voucher to someone who follows @PentesterLab and likes this tweet !!

ALT Giveaway Giveawaytime GIF

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Time for another swag giveaway! We are going to send a t-shirt and few goodies to one person who follows @PentesterLab and likes this tweet !!
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Time for another giveaway! We are going to send a t-shirt and a few goodies to one person who follows @PentesterLab and retweets this tweet!! And we are going to give a 12-month voucher to someone who follows @PentesterLab and likes this tweet!!
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Time for another swag giveaway! You know the drill: We are going to send a t-shirt and few goodies to one person who follows @PentesterLab and likes this tweet !!
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Every Single Time...
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Time for another giveaway! We are going to send a t-shirt and a few goodies to one person who follows @PentesterLab and retweets this tweet!! And we are going to give a 12-month voucher to someone who follows @PentesterLab and likes this tweet!!
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Time for another giveaway! We are going to send a t-shirt and a few goodies to one person who follows @PentesterLab and retweets this tweet!! And we are going to give a 12-month voucher to someone who follows @PentesterLab and likes this tweet!!
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Another Black Friday Giveaway! Make sure you check our deals: pentesterlab.com/pro We are going to send a t-shirt and a few goodies to one person who retweets this tweet!! And we are going to give a 12-month voucher to someone who likes this tweet!!

Advanced Web Hacking Labs and Security Code Review Training | PentesterLab PRO

Access advanced web hacking labs, in-depth video walkthroughs, and security code review training built around real vulnerabilities, exploitation techniques, and practical AppSec skills.

pentesterlab.com
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Final Giveaway! This time for #Cyber Monday Make sure you check our deals: pentesterlab.com/pro We are going to send a t-shirt and a few goodies to one person who retweets this tweet!! And we are going to give a 12-month voucher to someone who likes this tweet!!

Advanced Web Hacking Labs and Security Code Review Training | PentesterLab PRO

Access advanced web hacking labs, in-depth video walkthroughs, and security code review training built around real vulnerabilities, exploitation techniques, and practical AppSec skills.

pentesterlab.com
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Time for another giveaway! We are going to send a t-shirt and a few goodies to one person who follows @PentesterLab and retweets this tweet!! And we are going to give a 12-month voucher to someone who follows @PentesterLab and likes this tweet!!
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We were planning 70 x 1-month voucher for our 70k followers. We are going to double it (140 x 1-month) if we reach 70k followers before the end of Def Con!
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🎉🥳🎉 We just reached 110K followers! 🎉🥳🎉 🎉🥳🎉🥳Let's celebrate! 🎉🥳🎉🥳 We are going to give a 1-month voucher to 110 people who RT this tweet and follow @PentesterLab (picked randomly)!
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Time for another giveaway! We are going to send a t-shirt and a few goodies to one person who follows @PentesterLab and retweets this tweet!! And we are going to give a 12-month voucher to someone who follows @PentesterLab and likes this tweet!!
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Want to bypass WAF when exploiting CVE-2019-5418 ? curl -H 'Accept: ../../../../../../e*c/p*s*d{{' http://server/...
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Two more days before our Black Friday specials! And we just reached 90K followers! Let's celebrate! We are going to give a 1-month voucher to 90 people who RT this tweet and follow @PentesterLab (picked randomly)!
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Time for another giveaway! We are going to send a t-shirt and a few goodies to one person who follows @PentesterLab and retweets this tweet!! And we are going to give a 12-month voucher to someone who follows @PentesterLab and likes this tweet!!
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Not going to show off but some of our labs cover how to access the source code of an HTML page.
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To celebrate our new channel piped.video/@AppSecSchool! We are going to send a t-shirt and a few goodies to one person who follows @PentesterLab and retweets this tweet!! And we are going to give a 12-month voucher to someone who follows @PentesterLab and likes this tweet!!

AppSecSchool

Hi, welcome to our new youtube channel named AppSecSchool. Our goal with this channel is to cover the less technical aspects of Application Security, especially for people working or wanting to work...

youtube.com
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We put together a small XSS challenge: http://157.230.239.59:1234/ The goal is to get an alert box using a script tag.
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Two new wallpapers are now available! pentesterlab.com/wallpapers Dark mode vs light mode...
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🚨🚨🚨 Too many people miss critical vulnerabilities because they assume a GET request can't have a body! 🚨🚨🚨 This is how you can send such a request using #curl: $ curl '0.0.0.0:1234/download?filename=TEST' --data 'filename=../../../../../../../etc/passwd' -X GET
nc running in a terminal with the GET request containing a body

ALT nc running in a terminal with the GET request containing a body

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Articles worth reading discovered last week: 🗞️ hipotermia.pw/bb/http-desync… 🗞️ gitlab.com/gitlab-com/gl-sec… 🗞️ teddit.net/r/crypto/comments… 🗞️ know.bishopfox.com/research/… 🗞️ diverto.github.io/2019/11/18…

hipotermia - HTTP Request Smuggling + IDOR

A bug chain of HTTP Request Smuggling and an IDOR which allows to retrieve user sensitive data

hipotermia.pw
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We just released our JSON Web tokens cheatsheet: assets.pentesterlab.com/jwt_…
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You pop a shell, what is the first command you run?
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And we just released our latest challenge: Log4j Remote Code Execution: pentesterlab.com/exercises/l…
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We would like to welcome our new team member: Jia Tan! Jia will work on a set of challenges for our "Supply Chain" badge!!
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Their only weakness...
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Just in case someone wonders: bcrypt.
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Good articles discovered last week: 🗞️ blog.tint0.com/2019/03/a-sag… 🗞️ medium.com/@sharan.panegav/a… 🗞️ people.eng.unimelb.edu.au/vj…

A Saga of Code Executions on Zimbra

Zimbra is well known for its signature email product, Zimbra Collaboration Suite. Putting client-side vulnerabilities aside, Zimbra seems to...

blog.tint0.com
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The LinkedIn profile vs the DEF CON photo
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Doing an internal pentest in an unpatched Windows environment.
Consulting Comedy
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Our latest exercise on PDF SSRF based on the excellent talk from @daeken and @NahamSec at DefCon 2019 is now available: pentesterlab.com/exercises/p…
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Pentester pro tip: After a successful engagement, encrypt all the client’s files. Give them the full ransomware experience and watch how fast that invoice gets paid.
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How it started. How it is going.
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हमने अभी 13 घंटे के वीडियो के लिए हिंदी में सबटाइटल जारी किए हैं! 12 महीने का वाउचर जीतने का मौका पाने के लिए रीट्वीट करें
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Five activities every web hacker should do at least once: 1. Read the source code of an HTTP request parser 2. Write a small web application with registration, authentication, file upload... 3. Read an RFC 4. Participate in a Capture The Flag competition. 5. Fix a vulnerability in an open-source project.
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We are partnering with @Bugcrowd to help researchers find more and better bugs: bugcrowd.com/blog/bugcrowd_p… !!! P1📈 P5📉

Bugcrowd + PentesterLab — Learn Web Hacking Easier! | @Bugcrowd

As we open a new year, Bugcrowd is continuing to drive toward its goal of continued investment in the development of its researchers. We are overwhelmingly proud to announce that we’re partnering...

bugcrowd.com
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Articles worth reading discovered last week: 🗞️ rcesecurity.com/2019/09/H1-4… 🗞️ blog.evilpacket.net/2019/lev… 🗞️medium.com/@cc1h2e1/write-up…
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🎉🎉 50k followers!! 🎉🎉 🎉🎉 Thanks everyone for your support!🎉🎉
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How it started: How it’s going:
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PentesterLab PRO is 5 years old...
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Stop reading dozens of hacking/security books. Focus on taking action: ‣ Hands-on learning ‣ Hack on real applications/networks (open source projects, bug bounty...) ‣ Read write-ups (CTF, bug bounty, vulnerability research...) ‣ Meet like-minded people (twitter, discord, meetups, conferences) ‣ Learn to read/write code
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And our Black Friday Sale is Live: pentesterlab.com/pro 2*13.37% off on the one year subscription!
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🗞 synacktiv.com/publications/e… 🗞 omar0x01.medium.com/hubspot-… 🗞 semgrep.dev/blog/2022/xml-se… 🗞 blog.trailofbits.com/2023/02… 🗞 portswigger.net/research/ser… 🗞 github.com/haproxy/haproxy/c… 🗞 blog.yeswehack.com/talent-de… 🗞 labs.ioactive.com/2023/02/ad… 🗞 pathonproject.com/zb/?9133a2… #PentesterLabWeekly

Exploiting a remote heap overflow with a custom TCP stack

Exploiting a remote heap overflow with a custom TCP stack

synacktiv.com
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Articles worth reading discovered last week: 🗞️ blog.intothesymmetry.com/202… 🗞️ medium.com/@renwa/bypass-sam… 🗞️ medium.com/@alex.birsan/the-… 🗞️ googleprojectzero.blogspot.c…

Bypass SameSite Cookies Default to Lax and get CSRF

SameSite=Lax Cookies by Default is a new browser feature we will look at how to bypass it and what is the security concerns with it..

medium.com
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Articles worth reading discovered last week: 🗞 github.com/scarvell/advisori… 🗞 breaking-bits.gitbook.io/bre… 🗞 security.humanativaspa.it/zy… 🗞 i.blackhat.com/EU-22/Wednesd… 🗞 daniel.haxx.se/blog/2022/12/… 🗞 bugs.chromium.org/p/project-… 🗞 gosecure.net/blog/2019/05/02… 🗞 pathonproject.com/zb/?d384df… #PentesterLabWeek
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As usual, PentesterLab will be running a Black Friday special on the week of the 27th of November. Stay tune.
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For people who haven't seen it before, make sure you check our JWT Security Cheatsheet: assets.pentesterlab.com/jwt_…
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Happy 2022! Don't stop learning and hack the planet!
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🤫🤫🤫 /100 🤫🤫🤫
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Our booth at CyberSec Asia
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Articles worth reading discovered last week: 🗞️ msreverseengineering.com/blo… 🗞️ portswigger.net/blog/http-de… 🗞️ [PDF] i.blackhat.com/USA-19/Wednes… 🗞️ imperialviolet.org/2019/08/1…

Automation Techniques in C++ Reverse Engineering — Möbius Strip Reverse Engineering

Here are the slides for my recent presentation at RECON, entitled "Automation Techniques in C++ Reverse Engineering". As usual, my slides use in-frame animations, so in brief, navigate them using...

msreverseengineering.com
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What is your favorite @PentesterLab challenge/exercise so far?
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Articles worth reading discovered last week: 🗞️ blahcat.github.io/2020/03/09… 🗞️ hackerone.com/reports/737140 🗞️ bugs.xdavidhu.me/google/2020… 🗞️ synacktiv.com/posts/exploit/…

Slack disclosed on HackerOne: Mass account takeovers using HTTP...

This researcher exploited an HTTP Request Smuggling bug on a Slack asset to perform a CL.TE-based hijack onto neighboring customer requests. This hijack forced the victim into an open-redirect that...

hackerone.com
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Do you want to get better at recon❓ The first three challenges of our ReCon badge are now available: pentesterlab.com/badges/reco… ‼️ Did we mention that they are free? 🎉🥳🍾

PentesterLab: Learn with our Recon Badge

The Recon badge is our set of exercises created to help you learn Reconnaissance. From findings usual files down to DNS and TLS exploration, this badge will help you get better at finding new targets

pentesterlab.com
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Who is your favorite hacker?
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Just Another Job Description...
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And a free ISO (22MB) for people who want to play with the recent #libssh bug #cve_2018_10933: isos.pentesterlab.com/cve-20… #pentesterlab
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Every week we tweet the latest articles we discovered: 🗞 adam-p.ca/blog/2021/11/const… 🗞 haxx.in/files/dirtypipez.c 🗞 httpvoid.com/?p=Circumventin… 🗞 graplsecurity.com/post/iou-r… 🗞 slideshare.net/MarkDowd13/pr… 🗞 nickgregory.me/linux/securit… 🗞 flattsecurity.medium.com/fin… #PentesterLabWeekly
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أصدرنا للتو ترجمات باللغة العربية لمدة 13 ساعة من مقاطع الفيديو! أعد التغريد للحصول على فرصة لربح قسيمة لمدة 12 شهرًا
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The impact of using AI on your learning experience...
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Is watching the videos cheating? Not at all, do what work for you! Everyone learns differently! Try on your own if that works for you, read the course if needed, watch the video if needed. A few week later, quickly go back to some challenges you struggled with.
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🎉🎉🎉 Happy New Year !!!🎉🎉🎉
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25k followers! 🎉🎉🎉 🥳🥳🥳 Thanks everyone for your support!
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We have 3 tickets for iwcon.live/ to give away, please comment and we will pick 3 winners later today!
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We just dropped another log4j challenge for more recent versions of Java: pentesterlab.com/exercises/l…

PentesterLab: Log4j RCE II

This exercise demonstrates the exploitation of a vulnerability in Log4j using a gadget to achieve remote code execution (RCE). It involves leveraging the JRMPListener from ysoserial to exploit the...

pentesterlab.com
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Coming soon....
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Articles worth reading discovered last week: 🗞️ buer.haus/2019/10/18/a-tale-… 🗞️ tagazok.virtualabs.fr/Worksh… 🗞️ cpdos.org 🗞️ shielder.it/blog/dont-open-t…
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Replace 15 minutes of daily social media or TV time with 15 minutes of reading source code or RFC. Small changes can lead to big improvements in your hacking skills!
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Happy New Year! pentesterlab.com/gift/6PztmV… (3-month) pentesterlab.com/gift/mwntl5… (3-month) pentesterlab.com/gift/HIslyy… (3-month)

Learn Web Penetration Testing: The Right Way

Learn Web Penetration Testing: The Right Way

pentesterlab.com
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Articles worth reading discovered last week: 🗞️ synacktiv.com/posts/exploit/… 🗞️ blog.ropnop.com/docker-for-p… 🗞️ medium.com/@iSecMax/сookie-…
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