oss-sec mailing list archives
Re: New Linux LPE via GSMIOC_SETCONF_DLCI?
From: Donald Buczek <buczek () molgen mpg de>
Date: Thu, 11 Apr 2024 09:06:13 +0200
On 4/10/24 21:56, Dr. Christopher Kunz wrote:
Hello all, it seems that a new LPE (or two) in the Linux kernel has been dropped. The situation is a bit confusing and after discussing with Alexander off-list, I decided to post the various versions of the bug and the corresponding PoCs. Maybe we can clear this up together. 1. YuriiCrimson's version (April 6-ish) It seems to use GSMIOC_SETCONF_DLCI, PoC supposedly works on current Ubuntu and Debians, but is stopped by LKRG.
Thanks! For other distros or self-rolled kernels: Depends on CONFIG_N_GSM. D.
PoC and writeup are here: https://github.com/YuriiCrimson/ExploitGSM/tree/main 2. jmpeaux' version (March 21) This seems similar, also using GSMIOC_SETCONF_DLCI. In the screen shots, even the working dir for the PoC is identical to 1). Yurii claims jmpeaux stole his work. Writeup: https://jmpeax.dev/The-tale-of-a-GSM-Kernel-LPE.html PoC: https://github.com/jmpe4x/GSM_Linux_Kernel_LPE_Nday_Exploit/tree/main And then there's 3. ZDI-24-020 / CVE-2023-6546 (January) This also exploits a race condition resulting UAF in the gsm_dlci struct. It's a little older. Writeup and PoC: https://github.com/Nassim-Asrir/ZDI-24-020/ What do you make of this? Best regards, --cku
-- Donald Buczek buczek () molgen mpg de Tel: +49 30 8413 1433
Current thread:
- New Linux LPE via GSMIOC_SETCONF_DLCI? Dr. Christopher Kunz (Apr 10)
- Re: New Linux LPE via GSMIOC_SETCONF_DLCI? Solar Designer (Apr 10)
- Re: New Linux LPE via GSMIOC_SETCONF_DLCI? Solar Designer (Apr 16)
- Re: New Linux LPE via GSMIOC_SETCONF_DLCI? Greg KH (Apr 16)
- Re: New Linux LPE via GSMIOC_SETCONF_DLCI? Dr. Christopher Kunz (Apr 17)
- Re: New Linux LPE via GSMIOC_SETCONF_DLCI? Solar Designer (Apr 16)
- Re: New Linux LPE via GSMIOC_SETCONF_DLCI? Donald Buczek (Apr 11)
- Re: New Linux LPE via GSMIOC_SETCONF_DLCI? Dr. Christopher Kunz (Apr 11)
- Re: New Linux LPE via GSMIOC_SETCONF_DLCI? Solar Designer (Apr 11)
- Re: New Linux LPE via GSMIOC_SETCONF_DLCI? Dr. Christopher Kunz (Apr 11)
- Re: New Linux LPE via GSMIOC_SETCONF_DLCI? Kyle Zeng (Apr 11)
- Re: New Linux LPE via GSMIOC_SETCONF_DLCI? Kyle Zeng (Apr 11)
- Re: New Linux LPE via GSMIOC_SETCONF_DLCI? Solar Designer (Apr 11)
- Re: New Linux LPE via GSMIOC_SETCONF_DLCI? Solar Designer (Apr 10)