CVE-2021-20316

Advisory lineage Upstream: 0 Downstream: 8
Modified
Published: 23 Aug 2022, 00:00
Last modified:03 Aug 2024, 17:37

Vulnerability Summary

Overall Risk (default)
medium
27/100
CVSS Score
6.8 MEDIUM
v3.1 (nvd)
EPSS Score
0.81% LOW
1% probability +0.16%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

23 Aug 2022, 00:00
Published
Vulnerability first disclosed
03 Aug 2024, 17:37
Last Modified
Vulnerability information updated

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.

CVSS Metrics

  • v3.1•MEDIUM•Score: 6.8CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N

EPSS Trends

Current EPSS score: 0.81%• Percentile: 75%

Techniques & Countermeasures

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

    The product contains a concurrent code sequence that 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 operating concurrently.

Affected Systems

  • debian•debian_linux

    10.0 | 11.0

  • redhat•enterprise_linux

    8.0

  • redhat•enterprise_linux_aus

    8.6

  • redhat•enterprise_linux_eus

    8.6

  • redhat•enterprise_linux_tus

    8.6

  • redhat•virtualization_host

    4.0

  • samba•samba

    < 4.15.0

References (6)