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CVE-2023-47565 PUBLISHED KEV CVSS 6.5 MEDIUM

A vulnerability was discovered in Samba, where the flaw allows SMB clients to truncate files, even with read-only permissions when the Samba VFS module "acl_xattr" is configured with "acl_xattr:ignore system acls = yes". The SMB protocol allows opening files when the client requests read-only access but then implicitly truncates the opened file to 0 bytes if the client specifies a separate OVERWRITE create disposition request. The issue arises in configurations that bypass kernel file system permissions checks, relying solely on Samba's permissions.

EPSS 85.89% · 99.4th percentile

Risk Scores

CVSS v3.1
6.5
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
EPSS Score
85.89%
99.4th percentile

Affected Products

VendorProductVersions
Red HatRed Hat Enterprise Linux 90:4.18.6-101.el9_3, 0:4.18.6-101.el9_3
Red HatRed Hat Enterprise Linux 8.6 Extended Update Support0:4.15.5-13.el8_6
Red HatRed Hat Storage 3
Red HatRed Hat Enterprise Linux 6
Red HatRed Hat Enterprise Linux 80:4.18.6-2.el8_9, 0:4.18.6-2.el8_9
Red HatRed Hat Enterprise Linux 6
Red HatRed Hat Virtualization 4 for Red Hat Enterprise Linux 80:4.15.5-13.el8_6
Red HatRed Hat Enterprise Linux 9.0 Extended Update Support0:4.15.5-111.el9_0
Red HatRed Hat Enterprise Linux 7
Red HatRed Hat Enterprise Linux 9.2 Extended Update Support0:4.17.5-104.el9_2
Red HatRed Hat Enterprise Linux 8.8 Extended Update Support0:4.17.5-4.el8_8

Timeline

References

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