Bug 1875818 (CVE-2020-29373) - CVE-2020-29373 kernel: Insecure handling of root directory for path lookups via io_uring
Summary: CVE-2020-29373 kernel: Insecure handling of root directory for path lookups v...
Keywords:
Status: CLOSED NOTABUG
Alias: CVE-2020-29373
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
: 1903291 (view as bug list)
Depends On: 1887419 1887420 1887423
Blocks: 1870582 1903292
TreeView+ depends on / blocked
 
Reported: 2020-09-04 13:05 UTC by Pedro Sampaio
Modified: 2020-12-10 18:35 UTC (History)
46 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed: 2020-10-01 14:21:10 UTC
Embargoed:

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Description Pedro Sampaio 2020-09-04 13:05:11 UTC 
A flaw was found in Linux kernel. Insecure handling of root directory for path lookups in io_uring may lead to a process inside a mount namespace to gain access to the filesystem outside of it.

References:

https://bugs.chromium.org/p/project-zero/issues/detail?id=2011
Comment 2 Petr Matousek 2020-10-12 12:22:57 UTC 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1887423]
Comment 3 Justin M. Forbes 2020-10-12 15:42:24 UTC 
This was fixed for Fedora with 5.4.24 stable kernel updates.
Comment 4 Petr Matousek 2020-12-10 12:26:45 UTC 
*** Bug 1903291 has been marked as a duplicate of this bug. ***
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