CVE-2021-20316

Published: Aug 23, 2022Modified: Jun 17, 2026

6.8

Vector

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N

Exploitability: 1.6 / Impact: 5.2

Source: NVD

Description

A flaw was found in the way Samba handled file/directory metadata. This flaw allows an authenticated attacker with permissions to read or modify share metadata, to perform this operation outside of the share.

Affected (8)

Products: Samba: Samba · Debian: Debian Linux · Redhat: Enterprise Linux, Enterprise Linux Aus, Enterprise Linux Eus, Enterprise Linux Tus, Virtualization Host

1 product

1 product

5 products

Enterprise Linux

Enterprise Linux Aus

Enterprise Linux Eus

Enterprise Linux Tus

Virtualization Host

Configuration A

1 vulnerable

Vulnerable Software	Affected Versions
Samba Samba	Before 4.15.0

Configuration B

2 vulnerable

Vulnerable Software	Affected Versions
Debian Debian Linux	Version 10.0
Debian Debian Linux	Version 11.0

Configuration C

5 vulnerable

Vulnerable Software	Affected Versions
Redhat Enterprise Linux	Version 8.0
Redhat Enterprise Linux Aus	Version 8.6
Redhat Enterprise Linux Eus	Version 8.6
Redhat Enterprise Linux Tus	Version 8.6
Redhat Virtualization Host	Version 4.0

Related CWEs

Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

The product contains a code sequence that can run concurrently with other code, and the code sequence requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence that is operating concurrently.

References (12)

https://access.redhat.com/security/cve/CVE-2021-20316

Source: secalert@redhat.com

Third Party Advisory

https://bugzilla.redhat.com/show_bug.cgi?id=2009673

Source: secalert@redhat.com

Issue TrackingThird Party Advisory

https://bugzilla.samba.org/show_bug.cgi?id=14842

Source: secalert@redhat.com

Issue TrackingVendor Advisory

https://security-tracker.debian.org/tracker/CVE-2021-20316

Source: secalert@redhat.com

MitigationThird Party Advisory

https://security.gentoo.org/glsa/202309-06

Source: secalert@redhat.com

https://www.samba.org/samba/security/CVE-2021-20316.html

Source: secalert@redhat.com

Vendor Advisory

https://access.redhat.com/security/cve/CVE-2021-20316

Source: af854a3a-2127-422b-91ae-364da2661108

Third Party Advisory

https://bugzilla.redhat.com/show_bug.cgi?id=2009673

Source: af854a3a-2127-422b-91ae-364da2661108

Issue TrackingThird Party Advisory

https://bugzilla.samba.org/show_bug.cgi?id=14842

Source: af854a3a-2127-422b-91ae-364da2661108

Issue TrackingVendor Advisory

https://security-tracker.debian.org/tracker/CVE-2021-20316

Source: af854a3a-2127-422b-91ae-364da2661108

MitigationThird Party Advisory

https://security.gentoo.org/glsa/202309-06

Source: af854a3a-2127-422b-91ae-364da2661108

https://www.samba.org/samba/security/CVE-2021-20316.html

Source: af854a3a-2127-422b-91ae-364da2661108

Vendor Advisory

Timeline

No history available yet.