oss-sec mailing list archives
Re: Re: backdoor in upstream xz/liblzma leading to ssh server compromise
From: Jonathan Schleifer <js () nil im>
Date: Sat, 30 Mar 2024 17:17:38 +0100
Am 30.03.24 um 16:10 schrieb Rein Fernhout (Levitating):
The script attached by Andres was from 5.6.0. I extracted the script from both versions and I can verify your diff. I attached the two versions I extracted.It definitely does look like the 5.6.1 version looks for 2 extra scripts to execute.I don't get any matches on the greps either though.
My main worry is that when I extracted it, I replaced the sed in here:sed \"r\n\" $gl_am_configmake | eval $gl_path_map | $gl_localedir_prefix -d 2>/dev/null
With a simple cat, as I could not make sed work. This worries me as it means there is probably some other transformation that I'm missing that would have made the sed work. Which means there's transformations I'm missing and those could as well mutate some of the test files or resulting payloads. So it could either change the grep itself, or create files that match the grep.
Which means I'm not sure that actually no files match and it actually executes nothing.
I also want to look more into the object file.
I think it's time to coordinate things.I created a chat room for this on Matrix, IRC and Discord -- all bridged together so it's essentially one chat room. Those interested, please join:
Matrix: #xz-backdoor-reversing:nil.im IRC: #xz-backdoor-reversing on irc.oftc.net Discord: https://discord.gg/XqTshWbR5F -- Jonathan
Current thread:
- Re: Re: backdoor in upstream xz/liblzma leading to ssh server compromise, (continued)
- Re: Re: backdoor in upstream xz/liblzma leading to ssh server compromise Mike O'Connor (Mar 30)
- Re: Re: backdoor in upstream xz/liblzma leading to ssh server compromise Florian Weimer (Mar 30)
- Re: backdoor in upstream xz/liblzma leading to ssh server compromise sjw (Mar 29)
- Re: backdoor in upstream xz/liblzma leading to ssh server compromise Alexander E. Patrakov (Mar 30)
- Re: backdoor in upstream xz/liblzma leading to ssh server compromise Axel Beckert (Mar 30)
- Re: backdoor in upstream xz/liblzma leading to ssh server compromise Salvatore Bonaccorso (Mar 30)
- Re: backdoor in upstream xz/liblzma leading to ssh server compromise Axel Beckert (Mar 30)
- Re: backdoor in upstream xz/liblzma leading to ssh server compromise Collin Funk (Mar 30)
- Re: backdoor in upstream xz/liblzma leading to ssh server compromise Jonathan Schleifer (Mar 30)
- Re: Re: backdoor in upstream xz/liblzma leading to ssh server compromise Rein Fernhout (Levitating) (Mar 30)
- Re: Re: backdoor in upstream xz/liblzma leading to ssh server compromise Jonathan Schleifer (Mar 30)
- Re: Re: backdoor in upstream xz/liblzma leading to ssh server compromise Rein Fernhout (Levitating) (Mar 30)
- Re: Re: backdoor in upstream xz/liblzma leading to ssh server compromise Fay Stegerman (Mar 30)
- Re: Re: backdoor in upstream xz/liblzma leading to ssh server compromise Rein Fernhout (Levitating) (Mar 30)
- RE: backdoor in upstream xz/liblzma leading to ssh server compromise Thomas Ward (Mar 30)
- Re: Re: backdoor in upstream xz/liblzma leading to ssh server compromise Axel Beckert (Mar 30)
- Re: Re: backdoor in upstream xz/liblzma leading to ssh server compromise Andres Freund (Mar 30)
- Re: backdoor in upstream xz/liblzma leading to ssh server compromise Solar Designer (Mar 31)