Red Hat: CVE-2023-4091: samba: SMB clients can truncate files with read-only permissions (Multiple Advisories)
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)
- redhat-upgrade-ctdb
- redhat-upgrade-ctdb-debuginfo
- redhat-upgrade-libnetapi
- redhat-upgrade-libnetapi-debuginfo
- redhat-upgrade-libnetapi-devel
- redhat-upgrade-libsmbclient
- redhat-upgrade-libsmbclient-debuginfo
- redhat-upgrade-libsmbclient-devel
- redhat-upgrade-libwbclient
- redhat-upgrade-libwbclient-debuginfo
- redhat-upgrade-libwbclient-devel
- redhat-upgrade-python3-samba
- redhat-upgrade-python3-samba-dc
- redhat-upgrade-python3-samba-dc-debuginfo
- redhat-upgrade-python3-samba-debuginfo
- redhat-upgrade-python3-samba-devel
- redhat-upgrade-python3-samba-test
- redhat-upgrade-samba
- redhat-upgrade-samba-client
- redhat-upgrade-samba-client-debuginfo
- redhat-upgrade-samba-client-libs
- redhat-upgrade-samba-client-libs-debuginfo
- redhat-upgrade-samba-common
- redhat-upgrade-samba-common-libs
- redhat-upgrade-samba-common-libs-debuginfo
- redhat-upgrade-samba-common-tools
- redhat-upgrade-samba-common-tools-debuginfo
- redhat-upgrade-samba-dc-libs
- redhat-upgrade-samba-dc-libs-debuginfo
- redhat-upgrade-samba-dcerpc
- redhat-upgrade-samba-dcerpc-debuginfo
- redhat-upgrade-samba-debuginfo
- redhat-upgrade-samba-debugsource
- redhat-upgrade-samba-devel
- redhat-upgrade-samba-krb5-printing
- redhat-upgrade-samba-krb5-printing-debuginfo
- redhat-upgrade-samba-ldb-ldap-modules
- redhat-upgrade-samba-ldb-ldap-modules-debuginfo
- redhat-upgrade-samba-libs
- redhat-upgrade-samba-libs-debuginfo
- redhat-upgrade-samba-pidl
- redhat-upgrade-samba-test
- redhat-upgrade-samba-test-debuginfo
- redhat-upgrade-samba-test-libs
- redhat-upgrade-samba-test-libs-debuginfo
- redhat-upgrade-samba-tools
- redhat-upgrade-samba-usershares
- redhat-upgrade-samba-vfs-iouring
- redhat-upgrade-samba-vfs-iouring-debuginfo
- redhat-upgrade-samba-winbind
- redhat-upgrade-samba-winbind-clients
- redhat-upgrade-samba-winbind-clients-debuginfo
- redhat-upgrade-samba-winbind-debuginfo
- redhat-upgrade-samba-winbind-krb5-locator
- redhat-upgrade-samba-winbind-krb5-locator-debuginfo
- redhat-upgrade-samba-winbind-modules
- redhat-upgrade-samba-winbind-modules-debuginfo
- redhat-upgrade-samba-winexe
- redhat-upgrade-samba-winexe-debuginfo
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