[<prev] [next>] [<thread-prev] [day] [month] [year] [list]
Message-ID: <20220902094946.GA28965@openwall.com>
Date: Fri, 2 Sep 2022 11:49:46 +0200
From: Solar Designer <solar@...nwall.com>
To: oss-security@...ts.openwall.com
Subject: Re: Linux Kernel use-after-free write in netfilter
On Thu, Aug 25, 2022 at 03:20:21PM +0200, Solar Designer wrote:
> On Tue, May 31, 2022 at 10:00:32AM +0100, EDG EDG wrote:
> > A use-after-free write vulnerability was identified within the
> > netfilter subsystem
> > which can be exploited to achieve privilege escalation to root.
> >
> > In order to trigger the issue it requires the ability to create user/net
> > namespaces.
> >
> > This issue has been fixed within the following commit:
> >
> > https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/net/netfilter?id=520778042ccca019f3ffa136dd0ca565c486cedd
> >
> > The issue was previously confirmed on the latest linux master (commit
> > 143a6252e1b8ab424b4b293512a97cca7295c182) and we have confirmed it can be
> > exploited for privilege escalation on Ubuntu 22.04 (Linux kernel
> > 5.15.0-27-generic).
> [...]
> > # POC Code
> [...]
> > printf("should have triggered KASAN\n");
>
> While the message above included PoC code, there's now also a blog post
> and GitHub repo with a full exploit:
>
> https://blog.theori.io/research/CVE-2022-32250-linux-kernel-lpe-2022/
> https://github.com/theori-io/CVE-2022-32250-exploit
>
> "In this post, we have shown the process of exploiting CVE-2022-32250.
> We were able to leak KASLR and overwrite modprobe_path by utilizing the
> mqueue functions, and as a result, we successfully gained root
> privileges in Ubuntu 22.04."
The Exploit Development Group (EDG) at NCC Group, who discovered this
vulnerability and started this thread, have just published their own
write-up about its exploitation:
https://research.nccgroup.com/2022/09/01/settlers-of-netlink-exploiting-a-limited-uaf-in-nf_tables-cve-2022-32250/
Alexander
Powered by blists - more mailing lists
Please check out the
Open Source Software Security Wiki, which is counterpart to this
mailing list.
Confused about mailing lists and their use?
Read about mailing lists on Wikipedia
and check out these
guidelines on proper formatting of your messages.
