CVE-2021-43566

All versions of Samba prior to 4.13.16 are vulnerable to a malicious client using an SMB1 or NFS race to allow a directory to be created in an area of the server file system not exported under the share definition. Note that SMB1 has to be enabled, or the share also available via NFS in order for this attack to succeed.

CVSS v3.1

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

CVSS v2.0

1.2 LOWAV:L/AC:H/Au:N/C:N/I:P/A:N

EPSS

0.38% chance of exploitation in the next 30 days, 31th percentile

Published

2022-01-11

Updated

2024-08-04

Proof-of-concept exploits (1)

• https://bugzilla.samba.org/show_bug.cgi?id=13979

References

• CVE Record
• NVD entry

Related

• CVE-2021-43557
• CVE-2021-43568
• CVE-2021-43530
• CVE-2021-43569
• CVE-2021-43517
• CVE-2021-43570