[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <CAFE48uQg-zUyjYNjf150uFqdMJV0M5Q8RPbr827OFK9H=Y=gtw@mail.gmail.com>
Date: Thu, 30 Mar 2017 08:48:21 +0530
From: Lokesh Ubuntu <lokesh.ubuntu@...il.com>
To: oss-security@...ts.openwall.com
Cc: security@...ntu.com
Subject: Re: CVE-2017-7184: kernel: Local privilege escalation
in XFRM framework
Is there any POC for this to conclude? Thanks.
Regards, Lokesh
On Mar 30, 2017 03:14, "Tyler Hicks" <tyhicks@...onical.com> wrote:
> A security issue was reported by ZDI, on behalf of Chaitin Security
> Research Lab, against the Linux kernel in Ubuntu. It also affected the
> upstream kernel.
>
> Chaitin Security Research Lab discovered that xfrm_replay_verify_len(),
> as called by xfrm_new_ae(), did not verify that the user-specified
> replay_window was within the replay state buffer.
>
> This allowed for out-of-bounds reads and writes of kernel memory.
> Chaitin Security showed that this can lead to local privilege escalation
> by using user namespaces in order to configure XFRM. XFRM configuration
> requires CAP_NET_ADMIN so this issue is mitigated in kernels which do
> not enable user namespaces by default.
>
> Fixes:
> - https://git.kernel.org/linus/677e806da4d916052585301785d847c3b3e6186a
> - https://git.kernel.org/linus/f843ee6dd019bcece3e74e76ad9df0155655d0df
>
> Tyler
>
>
>
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.
