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From: Masami Ichikawa <masami.ichikawa@miraclelinux.com>
To: cip-dev@lists.cip-project.org
Subject: Re: [cip-dev] New CVE entries in this week
Date: Thu, 9 Dec 2021 23:12:07 +0900	[thread overview]
Message-ID: <CAODzB9qxwVDVCosFY6LU9iXxqBTOFcjoANgj9-cLkzoc6mam4Q@mail.gmail.com> (raw)
In-Reply-To: <20211209092052.GA14638@amd>

Hi !

On Thu, Dec 9, 2021 at 6:21 PM Pavel Machek <pavel@denx.de> wrote:
>
> Hi!
>
> > * New CVEs
> >
> > CVE-2021-39636: "no details"
> >
> > CVSS v3 score is not provided
> >
> > There is no vulnerability details yet. However, there is five patches
> > are addressed so the bug is in the netfilter module.
> >
> > f32815d ("xtables: add xt_match, xt_target and data copy_to_user
> > functions"): merged in 4.11-rc1
> > f77bc5b ("iptables: use match, target and data copy_to_user helpers"):
> > merged in 4.11-rc1
> > e47ddb2 ("ip6tables: use match, target and data copy_to_user
> > helpers"): merged in 4.11-rc1
> > ec23189 ("xtables: extend matches and targets with .usersize"): merged
> > in 4.11-rc1
> > 1e98ffe ("netfilter: x_tables: fix pointer leaks to userspace"):
> > merged in 4.16-rc1. This fixes commit ec23189 ("xtables: extend
> > matches and targets with .usersize") that was merged in 4.11-rc1.
> >
> > Fixed status
> >
> > mainline: [f32815d21d4d8287336fb9cef4d2d9e0866214c2,
> > f77bc5b23fb1af51fc0faa8a479dea8969eb5079,
> >   e47ddb2c4691fd2bd8d25745ecb6848408899757,
> > ec23189049651b16dc2ffab35a4371dc1f491aca,
> >   1e98ffea5a8935ec040ab72299e349cb44b8defd]
> > stable/4.14: [f32815d21d4d8287336fb9cef4d2d9e0866214c2,
> > f77bc5b23fb1af51fc0faa8a479dea8969eb5079,
> >   e47ddb2c4691fd2bd8d25745ecb6848408899757,
> > ec23189049651b16dc2ffab35a4371dc1f491aca,
> >   ad10785a706e63ff155fc97860cdcc5e3bc5992d]
>
> Hmm. Fun. 1e98ffea5a8935ec040ab72299e349cb44b8defd may have a clue:
>
>     This leads to kernel pointer leaks if a match/target is set
>     and then read back to userspace.
>
> So that sounds like KASLR workaround? iptables are normally limited to
> priviledged users, and KASLR is just a technology to make exploitation
> hard. I don't think we care too much here.
>

I got it.

> > CVE-2018-25020: bpf: fix truncated jump targets on heavy expansions
> >
> > CVSS v3 score is not provided
> >
> > Fixed status
> >
> > The BPF subsystem in the kernel through 4.17-rc7 has overflow bug.
> >
> > mainline: [050fad7c4534c13c8eb1d9c2ba66012e014773cb]
>
> Fun. JITs are hard to get right. I guess "avoid BPF" and "certainly
> don't allow unpriviledged access to BPF" is good advice.
>

Yeah, I agree.

> Best regards,
>                                                                 Pavel
> --
> DENX Software Engineering GmbH,      Managing Director: Wolfgang Denk
> HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
>
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Regards,


-- 
Masami Ichikawa
Cybertrust Japan Co., Ltd.

Email :masami.ichikawa@cybertrust.co.jp
          :masami.ichikawa@miraclelinux.com


  reply	other threads:[~2021-12-09 14:12 UTC|newest]

Thread overview: 25+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-12-08 23:44 New CVE entries in this week Masami Ichikawa
2021-12-09  9:20 ` [cip-dev] " Pavel Machek
2021-12-09 14:12   ` Masami Ichikawa [this message]
  -- strict thread matches above, loose matches on Subject: below --
2022-01-26 23:51 Masami Ichikawa
2022-01-27  8:21 ` [cip-dev] " nobuhiro1.iwamatsu
2022-01-28  6:18   ` Masami Ichikawa
2022-01-29 21:03 ` Pavel Machek
2022-01-31  0:00   ` Masami Ichikawa
2022-01-12 23:39 Masami Ichikawa
2022-01-13  8:07 ` [cip-dev] " Pavel Machek
2022-01-13 12:41   ` Masami Ichikawa
2021-12-29 23:29 Masami Ichikawa
2021-12-30 10:20 ` [cip-dev] " Pavel Machek
2021-12-30 23:05   ` Masami Ichikawa
2021-12-23  0:48 Masami Ichikawa
2021-12-23 17:11 ` [cip-dev] " Pavel Machek
2021-12-15 23:49 Masami Ichikawa
2021-12-16  5:26 ` [cip-dev] " nobuhiro1.iwamatsu
2021-12-16  5:58   ` Masami Ichikawa
2021-12-16  8:49 ` Pavel Machek
     [not found] <16BAA9D56D09F20A.23256@lists.cip-project.org>
2021-11-25  5:16 ` Masami Ichikawa
2021-11-25  8:00   ` nobuhiro1.iwamatsu
2021-11-25 12:00     ` Masami Ichikawa
2021-11-25  9:09   ` Pavel Machek
2021-11-25 12:01     ` Masami Ichikawa
2021-11-25  2:41 Masami Ichikawa
2021-11-25  9:14 ` [cip-dev] " Pavel Machek
2021-11-10 23:52 Masami Ichikawa
2021-11-11  9:21 ` [cip-dev] " Pavel Machek
2021-11-11 12:47   ` Masami Ichikawa
2021-11-04  1:11 New CVE Entries " Masami Ichikawa
2021-11-04  9:57 ` [cip-dev] " Pavel Machek
2021-11-04 13:04   ` Masami Ichikawa

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