ALERT ALERT plaintext passwords in linux ALERT ALERT

[johnpf () atnet net au (John)]

This is extremely old. There was an exploit for Linux and Solaris that 
used this back in 1995 (or earlier). In that case the idea was to get a 
local user shell, then start looking at kcore. Then try to login as root 
and grep for the crypted passwd, then feed that string to Jack-the-Ripper.

That was when the permissions on kcore were changed so that you cant see 
all of kcore.

There was even a trojaned copy of Slackware floating about that emailed 
via an anonymiser the root passwd every time passwd was run by root that 
used this.

JPF


ppan () hushmail com wrote:

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> Hash: SHA1
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>
> Problem:  Linux stores your passwords in plaintext
>          See proof of concept exploit below
>
> Fix:      rm -rf /dev/kmem
>
>
> Demonstration:
>
> - ---flic---
> bash$ ./passcheck.sh secret
> checkpass v1.5
> Proves that kmem leakes your passwords
> Needs to be run as root
> By etah^etihw aka peter-pan
>
> Checking for password 'secret'
> Binary file /proc/kcore matches
> - -flac-
>
> OMG!!!! it matches!!!
> Please don't tell anyone my root password because
> I cant change it because i deleted the passwd program
> because i thougt that it is vulnerable but I
> think it was not vulnerable but i cant get it because
> I have to port undel.exe to lunix first.
>
> Here is the 0-DAY exploit!
> Please do not abuse!!!
>
> - ---click---
> #!/bin/bash
>
> # POC exploit
> # shows kmem is a fscking leaker!
>
> echo "checkpass v1.5";
> echo "proves that kmem leakes your passwords";
> echo "needs to be run as root";
> echo "by etah^etihw";
> echo "             ";
>
> echo "checking for password '$1'";
> grep $1 /proc/kcore
> - ---clack---
>
> (do not forget to make 'chmod +x passcheck.sh'!!)
>
>
> Greets:
> zisss (you are the man bro!!)
> drater (mad resopectz to yu0!!)
> verb (wuz up? your a.t. owns me ass!!)
> jchrist (your dad > *)
>
> regards
> Peter Pan
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> wlkEARECABkFAj2EsMoSHHBwYW5AaHVzaG1haWwuY29tAAoJECqmU44+fV7iPaIAn2pT
> NuLBzLYbzXbT/Ked+GXgzcS/AKC2Q4jNv/wsI8bIjJq1yr/luPasGQ==
> =93nH
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>
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