SUSE update for samba

1) Permissions, Privileges, and Access Controls

EUVDB-ID: #VU81872

Risk: Low

CVSSv4.0: 1.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2023-4091

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: No

Description

The vulnerability allows a remote user to truncate read-only files.

The vulnerability exists due to an error in the way SMB protocol implementation in Samba handles file operations. A remote user can request read-only access to files and then truncate them to 0 bytes by opening files with OVERWRITE disposition when using the acl_xattr Samba VFS module with the smb.conf setting "acl_xattr:ignore system acls = yes".

Mitigation

Update the affected package samba to the latest version.

Vulnerable software versions

SUSE Linux Enterprise High Availability Extension 12: SP5

SUSE Linux Enterprise Software Development Kit 12: SP5

SUSE Linux Enterprise Server for SAP Applications 12: SP5

SUSE Linux Enterprise Server 12: SP5

SUSE Linux Enterprise High Performance Computing 12: SP5

ctdb-debuginfo: before 4.15.13+git.625.ac658f2f12-3.88.1

ctdb: before 4.15.13+git.625.ac658f2f12-3.88.1

libsamba-policy0-python3-debuginfo-32bit: before 4.15.13+git.625.ac658f2f12-3.88.1

samba-libs-32bit: before 4.15.13+git.625.ac658f2f12-3.88.1

samba-winbind-libs-debuginfo-32bit: before 4.15.13+git.625.ac658f2f12-3.88.1

samba-winbind-libs-32bit: before 4.15.13+git.625.ac658f2f12-3.88.1

samba-libs-python3-debuginfo-32bit: before 4.15.13+git.625.ac658f2f12-3.88.1

samba-libs-python3-32bit: before 4.15.13+git.625.ac658f2f12-3.88.1

samba-libs-debuginfo-32bit: before 4.15.13+git.625.ac658f2f12-3.88.1

samba-client-libs-32bit: before 4.15.13+git.625.ac658f2f12-3.88.1

samba-client-debuginfo-32bit: before 4.15.13+git.625.ac658f2f12-3.88.1

libsamba-policy0-python3-32bit: before 4.15.13+git.625.ac658f2f12-3.88.1

samba-client-32bit: before 4.15.13+git.625.ac658f2f12-3.88.1

samba-client-libs-debuginfo-32bit: before 4.15.13+git.625.ac658f2f12-3.88.1

samba-doc: before 4.15.13+git.625.ac658f2f12-3.88.1

samba-winbind-libs: before 4.15.13+git.625.ac658f2f12-3.88.1

samba-winbind: before 4.15.13+git.625.ac658f2f12-3.88.1

samba-winbind-libs-debuginfo: before 4.15.13+git.625.ac658f2f12-3.88.1

libsamba-policy0-python3-debuginfo: before 4.15.13+git.625.ac658f2f12-3.88.1

libsamba-policy0-python3: before 4.15.13+git.625.ac658f2f12-3.88.1

samba-client-libs: before 4.15.13+git.625.ac658f2f12-3.88.1

samba-winbind-debuginfo: before 4.15.13+git.625.ac658f2f12-3.88.1

samba: before 4.15.13+git.625.ac658f2f12-3.88.1

samba-libs-python3: before 4.15.13+git.625.ac658f2f12-3.88.1

samba-libs-debuginfo: before 4.15.13+git.625.ac658f2f12-3.88.1

samba-python3: before 4.15.13+git.625.ac658f2f12-3.88.1

samba-ldb-ldap: before 4.15.13+git.625.ac658f2f12-3.88.1

samba-libs-python3-debuginfo: before 4.15.13+git.625.ac658f2f12-3.88.1

samba-client: before 4.15.13+git.625.ac658f2f12-3.88.1

samba-ldb-ldap-debuginfo: before 4.15.13+git.625.ac658f2f12-3.88.1

samba-client-debuginfo: before 4.15.13+git.625.ac658f2f12-3.88.1

samba-tool: before 4.15.13+git.625.ac658f2f12-3.88.1

samba-libs: before 4.15.13+git.625.ac658f2f12-3.88.1

samba-client-libs-debuginfo: before 4.15.13+git.625.ac658f2f12-3.88.1

samba-python3-debuginfo: before 4.15.13+git.625.ac658f2f12-3.88.1

samba-devel-32bit: before 4.15.13+git.625.ac658f2f12-3.88.1

libsamba-policy-python3-devel: before 4.15.13+git.625.ac658f2f12-3.88.1

samba-debugsource: before 4.15.13+git.625.ac658f2f12-3.88.1

samba-devel: before 4.15.13+git.625.ac658f2f12-3.88.1

samba-debuginfo: before 4.15.13+git.625.ac658f2f12-3.88.1

libsamba-policy-devel: before 4.15.13+git.625.ac658f2f12-3.88.1

CPE2.3

• cpe:2.3:o:suse:suse_linux_enterprise_high_availability_extension_12:SP5:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_linux_enterprise_software_development_kit_12:SP5:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_linux_enterprise_server_for_sap_applications_12:SP5:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_linux_enterprise_server_12:SP5:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_linux_enterprise_high_performance_computing_12:SP5:*:*:*:*:*:*:*
• cpe:2.3:o:suse:ctdb-debuginfo:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:ctdb:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:libsamba-policy0-python3-debuginfo-32bit:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:samba-libs-32bit:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:samba-winbind-libs-debuginfo-32bit:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:samba-winbind-libs-32bit:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:samba-libs-python3-debuginfo-32bit:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:samba-libs-python3-32bit:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:samba-libs-debuginfo-32bit:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:samba-client-libs-32bit:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:samba-client-debuginfo-32bit:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:libsamba-policy0-python3-32bit:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:samba-client-32bit:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:samba-client-libs-debuginfo-32bit:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:samba-doc:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:samba-winbind-libs:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:samba-winbind:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:samba-winbind-libs-debuginfo:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:libsamba-policy0-python3-debuginfo:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:libsamba-policy0-python3:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:samba-client-libs:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:samba-winbind-debuginfo:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:samba:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:samba-libs-python3:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:samba-libs-debuginfo:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:samba-python3:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:samba-ldb-ldap:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:samba-libs-python3-debuginfo:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:samba-client:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:samba-ldb-ldap-debuginfo:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:samba-client-debuginfo:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:samba-tool:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:samba-libs:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:samba-client-libs-debuginfo:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:samba-python3-debuginfo:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:samba-devel-32bit:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:libsamba-policy-python3-devel:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:samba-debugsource:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:samba-devel:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:samba-debuginfo:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:libsamba-policy-devel:*:*:*:*:*:suse_linux:*:*

External links

https://www.suse.com/support/update/announcement/2023/suse-su-20234040-1/

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.