SUSE update for samba

Published: 2023-01-26

Risk	High
Patch available	YES
Number of vulnerabilities	3
CVE-ID	CVE-2021-20251 CVE-2022-37966 CVE-2022-38023
CWE-ID	CWE-362 CWE-264 CWE-254
Exploitation vector	Network
Public exploit	N/A
Vulnerable software	SUSE Linux Enterprise High Performance Computing Operating systems & Components / Operating system SUSE Linux Enterprise High Availability Operating systems & Components / Operating system SUSE Linux Enterprise Software Development Kit Operating systems & Components / Operating system SUSE Linux Enterprise Server for SAP Applications Operating systems & Components / Operating system SUSE Linux Enterprise Server Operating systems & Components / Operating system ctdb-debuginfo Operating systems & Components / Operating system package or component ctdb Operating systems & Components / Operating system package or component samba-doc Operating systems & Components / Operating system package or component samba-winbind-libs-debuginfo-32bit Operating systems & Components / Operating system package or component samba-winbind-libs-32bit Operating systems & Components / Operating system package or component samba-libs-python3-debuginfo-32bit Operating systems & Components / Operating system package or component samba-libs-python3-32bit Operating systems & Components / Operating system package or component samba-libs-debuginfo-32bit Operating systems & Components / Operating system package or component samba-libs-32bit Operating systems & Components / Operating system package or component samba-client-libs-debuginfo-32bit Operating systems & Components / Operating system package or component samba-client-libs-32bit Operating systems & Components / Operating system package or component samba-client-debuginfo-32bit Operating systems & Components / Operating system package or component samba-client-32bit Operating systems & Components / Operating system package or component libsamba-policy0-python3-debuginfo-32bit Operating systems & Components / Operating system package or component libsamba-policy0-python3-32bit Operating systems & Components / Operating system package or component samba-winbind-libs-debuginfo Operating systems & Components / Operating system package or component samba-winbind-libs Operating systems & Components / Operating system package or component samba-winbind-debuginfo Operating systems & Components / Operating system package or component samba-winbind Operating systems & Components / Operating system package or component samba-tool Operating systems & Components / Operating system package or component samba-python3-debuginfo Operating systems & Components / Operating system package or component samba-python3 Operating systems & Components / Operating system package or component samba-libs-python3-debuginfo Operating systems & Components / Operating system package or component samba-libs-python3 Operating systems & Components / Operating system package or component samba-libs-debuginfo Operating systems & Components / Operating system package or component samba-libs Operating systems & Components / Operating system package or component samba-ldb-ldap-debuginfo Operating systems & Components / Operating system package or component samba-ldb-ldap Operating systems & Components / Operating system package or component samba-client-libs-debuginfo Operating systems & Components / Operating system package or component samba-client-libs Operating systems & Components / Operating system package or component samba-client-debuginfo Operating systems & Components / Operating system package or component samba-client Operating systems & Components / Operating system package or component samba Operating systems & Components / Operating system package or component libsamba-policy0-python3-debuginfo Operating systems & Components / Operating system package or component libsamba-policy0-python3 Operating systems & Components / Operating system package or component samba-devel-32bit Operating systems & Components / Operating system package or component samba-devel Operating systems & Components / Operating system package or component samba-debugsource Operating systems & Components / Operating system package or component samba-debuginfo Operating systems & Components / Operating system package or component libsamba-policy-python3-devel Operating systems & Components / Operating system package or component libsamba-policy-devel Operating systems & Components / Operating system package or component
Vendor	SUSE

Security Bulletin

This security bulletin contains information about 3 vulnerabilities.

1) Race condition

EUVDB-ID: #VU71486

Risk: Low

CVSSv4.0: 0.6 [CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-20251

CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a brute-force attack.

The vulnerability exists due to a race condition in Samba when incrementing bad password attempts. Each connection to Samba gets a separate process, and each process loads, increments, and saves the bad password count without any coordination. A remote attacker can perform a brute-force attack using multiple threats and bypass imposed limits on the number of allowed incorrect passwords.

Mitigation

Update the affected package samba to the latest version.

Vulnerable software versions

SUSE Linux Enterprise High Performance Computing: 12-SP5

SUSE Linux Enterprise High Availability: 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

ctdb-debuginfo: before 4.15.13+git.534.0d9f8ece26-3.77.1

ctdb: before 4.15.13+git.534.0d9f8ece26-3.77.1

samba-doc: before 4.15.13+git.534.0d9f8ece26-3.77.1

samba-winbind-libs-debuginfo-32bit: before 4.15.13+git.534.0d9f8ece26-3.77.1

samba-winbind-libs-32bit: before 4.15.13+git.534.0d9f8ece26-3.77.1

samba-libs-python3-debuginfo-32bit: before 4.15.13+git.534.0d9f8ece26-3.77.1

samba-libs-python3-32bit: before 4.15.13+git.534.0d9f8ece26-3.77.1

samba-libs-debuginfo-32bit: before 4.15.13+git.534.0d9f8ece26-3.77.1

samba-libs-32bit: before 4.15.13+git.534.0d9f8ece26-3.77.1

samba-client-libs-debuginfo-32bit: before 4.15.13+git.534.0d9f8ece26-3.77.1

samba-client-libs-32bit: before 4.15.13+git.534.0d9f8ece26-3.77.1

samba-client-debuginfo-32bit: before 4.15.13+git.534.0d9f8ece26-3.77.1

samba-client-32bit: before 4.15.13+git.534.0d9f8ece26-3.77.1

libsamba-policy0-python3-debuginfo-32bit: before 4.15.13+git.534.0d9f8ece26-3.77.1

libsamba-policy0-python3-32bit: before 4.15.13+git.534.0d9f8ece26-3.77.1

samba-winbind-libs-debuginfo: before 4.15.13+git.534.0d9f8ece26-3.77.1

samba-winbind-libs: before 4.15.13+git.534.0d9f8ece26-3.77.1

samba-winbind-debuginfo: before 4.15.13+git.534.0d9f8ece26-3.77.1

samba-winbind: before 4.15.13+git.534.0d9f8ece26-3.77.1

samba-tool: before 4.15.13+git.534.0d9f8ece26-3.77.1

samba-python3-debuginfo: before 4.15.13+git.534.0d9f8ece26-3.77.1

samba-python3: before 4.15.13+git.534.0d9f8ece26-3.77.1

samba-libs-python3-debuginfo: before 4.15.13+git.534.0d9f8ece26-3.77.1

samba-libs-python3: before 4.15.13+git.534.0d9f8ece26-3.77.1

samba-libs-debuginfo: before 4.15.13+git.534.0d9f8ece26-3.77.1

samba-libs: before 4.15.13+git.534.0d9f8ece26-3.77.1

samba-ldb-ldap-debuginfo: before 4.15.13+git.534.0d9f8ece26-3.77.1

samba-ldb-ldap: before 4.15.13+git.534.0d9f8ece26-3.77.1

samba-client-libs-debuginfo: before 4.15.13+git.534.0d9f8ece26-3.77.1

samba-client-libs: before 4.15.13+git.534.0d9f8ece26-3.77.1

samba-client-debuginfo: before 4.15.13+git.534.0d9f8ece26-3.77.1

samba-client: before 4.15.13+git.534.0d9f8ece26-3.77.1

samba: before 4.15.13+git.534.0d9f8ece26-3.77.1

libsamba-policy0-python3-debuginfo: before 4.15.13+git.534.0d9f8ece26-3.77.1

libsamba-policy0-python3: before 4.15.13+git.534.0d9f8ece26-3.77.1

samba-devel-32bit: before 4.15.13+git.534.0d9f8ece26-3.77.1

samba-devel: before 4.15.13+git.534.0d9f8ece26-3.77.1

samba-debugsource: before 4.15.13+git.534.0d9f8ece26-3.77.1

samba-debuginfo: before 4.15.13+git.534.0d9f8ece26-3.77.1

libsamba-policy-python3-devel: before 4.15.13+git.534.0d9f8ece26-3.77.1

libsamba-policy-devel: before 4.15.13+git.534.0d9f8ece26-3.77.1

CPE2.3

External links

https://www.suse.com/support/update/announcement/2023/suse-su-20230164-1/

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).

Is there known malware, which exploits this vulnerability?

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

2) Permissions, Privileges, and Access Controls

EUVDB-ID: #VU69094

Risk: High

CVSSv4.0: 7.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2022-37966

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

Exploit availability: No

Description

The vulnerability allows a remote attacker to escalate privileges on the system.

The vulnerability exists due to application does not properly impose security restrictions in Windows Kerberos RC4-HMAC. A remote attacker can conduct a man-in-middle (MiTM) attack, which leads to security restrictions bypass and privilege escalation.