VULNERABILITY

Alma Linux: CVE-2023-4091: Moderate: samba security update (Multiple Advisories)

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Alma Linux: CVE-2023-4091: Moderate: samba security update (Multiple Advisories)

Severity
7
CVSS
(AV:N/AC:L/Au:S/C:N/I:C/A:N)
Published
11/03/2023
Created
11/17/2023
Added
11/16/2023
Modified
01/30/2025

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.

Solution(s)

  • alma-upgrade-ctdb
  • alma-upgrade-libnetapi
  • alma-upgrade-libnetapi-devel
  • alma-upgrade-libsmbclient
  • alma-upgrade-libsmbclient-devel
  • alma-upgrade-libwbclient
  • alma-upgrade-libwbclient-devel
  • alma-upgrade-python3-samba
  • alma-upgrade-python3-samba-dc
  • alma-upgrade-python3-samba-devel
  • alma-upgrade-python3-samba-test
  • alma-upgrade-samba
  • alma-upgrade-samba-client
  • alma-upgrade-samba-client-libs
  • alma-upgrade-samba-common
  • alma-upgrade-samba-common-libs
  • alma-upgrade-samba-common-tools
  • alma-upgrade-samba-dc-libs
  • alma-upgrade-samba-dcerpc
  • alma-upgrade-samba-devel
  • alma-upgrade-samba-krb5-printing
  • alma-upgrade-samba-ldb-ldap-modules
  • alma-upgrade-samba-libs
  • alma-upgrade-samba-pidl
  • alma-upgrade-samba-test
  • alma-upgrade-samba-test-libs
  • alma-upgrade-samba-tools
  • alma-upgrade-samba-usershares
  • alma-upgrade-samba-vfs-iouring
  • alma-upgrade-samba-winbind
  • alma-upgrade-samba-winbind-clients
  • alma-upgrade-samba-winbind-krb5-locator
  • alma-upgrade-samba-winbind-modules
  • alma-upgrade-samba-winexe

References

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