linux-kernel - Re: [PATCH 1/3] capabilities: user namespace capabilities

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Message-ID: <ddf0f90e-e55d-47ce-a5ba-fb99289abe29@canonical.com>
Date: Fri, 17 May 2024 05:48:55 -0700
From: John Johansen <john.johansen@...onical.com>
To: Jonathan Calmels <jcalmels@...0.net>,
 "Eric W. Biederman" <ebiederm@...ssion.com>
Cc: brauner@...nel.org, Luis Chamberlain <mcgrof@...nel.org>,
 Kees Cook <keescook@...omium.org>, Joel Granados <j.granados@...sung.com>,
 Serge Hallyn <serge@...lyn.com>, Paul Moore <paul@...l-moore.com>,
 James Morris <jmorris@...ei.org>, David Howells <dhowells@...hat.com>,
 Jarkko Sakkinen <jarkko@...nel.org>, containers@...ts.linux.dev,
 linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
 linux-security-module@...r.kernel.org, keyrings@...r.kernel.org
Subject: Re: [PATCH 1/3] capabilities: user namespace capabilities

On 5/17/24 04:55, Jonathan Calmels wrote:
> On Fri, May 17, 2024 at 06:32:46AM GMT, Eric W. Biederman wrote:
>>
>> Pointers please?
>>
>> That sentence sounds about 5 years out of date.
> 
> The link referenced is from last year.
> Here are some others often cited by distributions:
> 
> https://nvd.nist.gov/vuln/detail/CVE-2022-0185
> https://nvd.nist.gov/vuln/detail/CVE-2022-1015
> https://nvd.nist.gov/vuln/detail/CVE-2022-2078
> https://nvd.nist.gov/vuln/detail/CVE-2022-24122
> https://nvd.nist.gov/vuln/detail/CVE-2022-25636
> 
> Recent thread discussing this too:
> https://seclists.org/oss-sec/2024/q2/128
> 

they were used in 2020, 2021, and 2022 pwn2own exploits. Sorry I don't remember the exact numbers and will have to dig.

pwn2own 2023 4/5 hacks used them
https://www.zerodayinitiative.com/blog/2023/3/23/pwn2own-vancouver-2023-day-two-results
I will need to dig to find the CVEs associated with them.

pwn2own 2024 I can not discuss atm

but its not just pwn2own, the actual list of kernel CVEs that unprivileged user namespaces make exploitable is much larger.