Home/CVE/A flaw was found in the way Samba handled file/directory metadata. This flaw allows an authenticated attacker with permi
CVE

CVE-2021-20316

A flaw was found in the way Samba handled file/directory metadata. This flaw allows an authenticated attacker with permi

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.

MEDIUM · CVSS 6.8 EPSS 0.00813
Monitor
  • No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
CWE-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
▤

Affected Products & Versions

7
samba< 4.15.0
debian linuxall versions
redhat virtualization hostall versions
redhat enterprise linuxall versions
redhat enterprise linux ausall versions
redhat enterprise linux eusall versions
redhat enterprise linux tusall versions
▣

Scoring & Timeline

6.8
MEDIUM · CVSS v3.1 · secalert@redhat.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD23 Aug 2022 · 04:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
⚑

Vendor Advisories

6
msrcCVE-2021-20316
suse-csafSUSE-SU-2022:0323-1
suse-csafopenSUSE-SU-2022:0283-1
suse-csafSUSE-SU-2022:0283-1
rhsaRHSA-2022:1756Moderate
🔗

References & Sources

6
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://access.redhat.com/security/cve/CVE-2021-20316Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2009673Issue TrackingThird Party Advisory
https://bugzilla.samba.org/show_bug.cgi?id=14842Issue TrackingVendor Advisory
https://security-tracker.debian.org/tracker/CVE-2021-20316MitigationThird Party Advisory
https://security.gentoo.org/glsa/202309-06
https://www.samba.org/samba/security/CVE-2021-20316.htmlVendor Advisory
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