oss-security - CVE-2019-20794 kernel: task processes not being properly ended could lead to resource exhaustion

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Message-ID: <CAKx+4-rQYK+Tkzszw6S736L7PVH0nudX5Sd5Pu_V--qmaRWxEg@mail.gmail.com>
Date: Mon, 24 Aug 2020 15:05:28 +0530
From: Rohit Keshri <rkeshri@...hat.com>
To: oss-security@...ts.openwall.com
Subject: CVE-2019-20794 kernel: task processes not being
 properly ended could lead to resource exhaustion

Hello Team,

Red Hat has identified a vulnerability with the following details.

A flaw was found when a user with PID namespace mounting a FUSE filesystem,
If the userspace component is terminated (pid 1), this results into a
denial of service (DoS) problem. This internally makes the fuse requests go
into Uninterruptible state until the system is rebooted.

'CVE-2019-20794' was assigned via MITRE.

Reference:

https://github.com/sargun/fuse-example

Thank you
..
Rohit Keshri / Red Hat Product Security Team
PGP: OX01BC 858A 07B7 15C8 EF33 BFE2 2EEB 0CBC 84A4 4C2D

secalert@...hat.com for urgent response

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