6.5
Medium
CVE-2023-4091 A vulnerability was discovered in Samba, where the flaw allows SMB clients to truncate files, even with read-only…
Description
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.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Red Hat Enterprise Linux 8 | Versions not published | |
| Red Hat Enterprise Linux 8.6 Extended Update Support | Versions not published | |
| Red Hat Enterprise Linux 8.8 Extended Update Support | Versions not published | |
| Red Hat Enterprise Linux 9 | Versions not published | |
| Red Hat Enterprise Linux 9.0 Extended Update Support | Versions not published | |
| Red Hat Enterprise Linux 9.2 Extended Update Support | Versions not published | |
| Red Hat Virtualization 4 for Red Hat Enterprise Linux 8 | Versions not published | |
| Red Hat Enterprise Linux 6 | Versions not published | |
| Red Hat Enterprise Linux 7 | Versions not published |
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| Product | Affected versions | Fixed in |
|---|---|---|
| Red Hat Storage 3 | Versions not published |
References
- RHSA-2023:6209 access.redhat.com
- RHSA-2023:6744 access.redhat.com
- RHSA-2023:7371 access.redhat.com
- RHSA-2023:7408 access.redhat.com
- RHSA-2023:7464 access.redhat.com
- RHSA-2023:7467 access.redhat.com
- access.redhat.com access.redhat.com
- RHBZ#2241882 bugzilla.redhat.com
- bugzilla.samba.org bugzilla.samba.org
- www.samba.org www.samba.org
Timeline
- Published
- Last modified
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