openEuler update for samba

Published: 2021-12-10

Risk	High
Patch available	YES
Number of vulnerabilities	6
CVE-ID	CVE-2016-2124 CVE-2020-25722 CVE-2021-3738 CVE-2020-25718 CVE-2020-25719 CVE-2020-25721
CWE-ID	CWE-284 CWE-264 CWE-416 CWE-362 CWE-287
Exploitation vector	Network
Public exploit	N/A
Vulnerable software Subscribe	openEuler Operating systems & Components / Operating system samba-vfs-glusterfs Operating systems & Components / Operating system package or component samba-pidl Operating systems & Components / Operating system package or component samba-common-tools Operating systems & Components / Operating system package or component python3-samba-test Operating systems & Components / Operating system package or component samba-test Operating systems & Components / Operating system package or component samba-common Operating systems & Components / Operating system package or component samba-winbind-clients Operating systems & Components / Operating system package or component samba-libs Operating systems & Components / Operating system package or component samba-dc-bind-dlz Operating systems & Components / Operating system package or component python3-samba-dc Operating systems & Components / Operating system package or component samba-dc Operating systems & Components / Operating system package or component samba-help Operating systems & Components / Operating system package or component samba-devel Operating systems & Components / Operating system package or component samba-dc-provision Operating systems & Components / Operating system package or component samba-debuginfo Operating systems & Components / Operating system package or component samba-debugsource Operating systems & Components / Operating system package or component ctdb Operating systems & Components / Operating system package or component samba-krb5-printing Operating systems & Components / Operating system package or component ctdb-tests Operating systems & Components / Operating system package or component samba-client Operating systems & Components / Operating system package or component samba-winbind-krb5-locator Operating systems & Components / Operating system package or component libsmbclient-devel Operating systems & Components / Operating system package or component libwbclient-devel Operating systems & Components / Operating system package or component python3-samba Operating systems & Components / Operating system package or component libsmbclient Operating systems & Components / Operating system package or component samba-winbind Operating systems & Components / Operating system package or component libwbclient Operating systems & Components / Operating system package or component samba-winbind-modules Operating systems & Components / Operating system package or component samba Operating systems & Components / Operating system package or component
Vendor	openEuler

Security Bulletin

This security bulletin contains information about 6 vulnerabilities.

1) Improper access control

EUVDB-ID: #VU58098

Risk: High

CVSSv3.1: 8.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2016-2124

CWE-ID: CWE-284 - Improper Access Control

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain unauthorized access to otherwise restricted functionality.

The vulnerability exists due to SMB1 client connections can be downgraded to plaintext authentication. A remote attacker can perform a man-in-the-middle attack and downgrade a negotiated SMB1 client connection and its capabitilities.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

openEuler: 20.03 LTS SP1 - 20.03 LTS SP2

samba-vfs-glusterfs: before 4.11.12-8

samba-pidl: before 4.11.12-8

samba-common-tools: before 4.11.12-8

python3-samba-test: before 4.11.12-8

samba-test: before 4.11.12-8

samba-common: before 4.11.12-8

samba-winbind-clients: before 4.11.12-8

samba-libs: before 4.11.12-8

samba-dc-bind-dlz: before 4.11.12-8

python3-samba-dc: before 4.11.12-8

samba-dc: before 4.11.12-8

samba-help: before 4.11.12-8

samba-devel: before 4.11.12-8

samba-dc-provision: before 4.11.12-8

samba-debuginfo: before 4.11.12-8

samba-debugsource: before 4.11.12-8

ctdb: before 4.11.12-8

samba-krb5-printing: before 4.11.12-8

ctdb-tests: before 4.11.12-8

samba-client: before 4.11.12-8

samba-winbind-krb5-locator: before 4.11.12-8

libsmbclient-devel: before 4.11.12-8

libwbclient-devel: before 4.11.12-8

python3-samba: before 4.11.12-8

libsmbclient: before 4.11.12-8

samba-winbind: before 4.11.12-8

libwbclient: before 4.11.12-8

samba-winbind-modules: before 4.11.12-8

samba: before 4.11.12-8

CPE2.3

External links

http://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2021-1461

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

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: #VU58093

Risk: Medium

CVSSv3.1: 7.7 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-25722

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

Exploit availability: No

Description

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

The vulnerability exists due to application does not properly impose security restrictions, which leads to security restrictions bypass and privilege escalation.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

openEuler: 20.03 LTS SP1 - 20.03 LTS SP2

samba-vfs-glusterfs: before 4.11.12-8

samba-pidl: before 4.11.12-8

samba-common-tools: before 4.11.12-8

python3-samba-test: before 4.11.12-8

samba-test: before 4.11.12-8

samba-common: before 4.11.12-8

samba-winbind-clients: before 4.11.12-8

samba-libs: before 4.11.12-8

samba-dc-bind-dlz: before 4.11.12-8

python3-samba-dc: before 4.11.12-8

samba-dc: before 4.11.12-8

samba-help: before 4.11.12-8

samba-devel: before 4.11.12-8

samba-dc-provision: before 4.11.12-8

samba-debuginfo: before 4.11.12-8

samba-debugsource: before 4.11.12-8

ctdb: before 4.11.12-8

samba-krb5-printing: before 4.11.12-8

ctdb-tests: before 4.11.12-8

samba-client: before 4.11.12-8

samba-winbind-krb5-locator: before 4.11.12-8

libsmbclient-devel: before 4.11.12-8

libwbclient-devel: before 4.11.12-8

python3-samba: before 4.11.12-8

libsmbclient: before 4.11.12-8

samba-winbind: before 4.11.12-8

libwbclient: before 4.11.12-8

samba-winbind-modules: before 4.11.12-8

samba: before 4.11.12-8

CPE2.3

External links

http://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2021-1461

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.

3) Use-after-free

EUVDB-ID: #VU58092

Risk: Medium

CVSSv3.1: 6.6 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-3738

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a use-after-free error in Samba AD DC RPC server. A remote authenticated attacker can gain elevated privileges and perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

openEuler: 20.03 LTS SP1 - 20.03 LTS SP2

samba-vfs-glusterfs: before 4.11.12-8

samba-pidl: before 4.11.12-8

samba-common-tools: before 4.11.12-8

python3-samba-test: before 4.11.12-8

samba-test: before 4.11.12-8

samba-common: before 4.11.12-8

samba-winbind-clients: before 4.11.12-8

samba-libs: before 4.11.12-8

samba-dc-bind-dlz: before 4.11.12-8

python3-samba-dc: before 4.11.12-8

samba-dc: before 4.11.12-8

samba-help: before 4.11.12-8

samba-devel: before 4.11.12-8

samba-dc-provision: before 4.11.12-8

samba-debuginfo: before 4.11.12-8

samba-debugsource: before 4.11.12-8

ctdb: before 4.11.12-8

samba-krb5-printing: before 4.11.12-8

ctdb-tests: before 4.11.12-8

samba-client: before 4.11.12-8

samba-winbind-krb5-locator: before 4.11.12-8

libsmbclient-devel: before 4.11.12-8

libwbclient-devel: before 4.11.12-8

python3-samba: before 4.11.12-8

libsmbclient: before 4.11.12-8

samba-winbind: before 4.11.12-8

libwbclient: before 4.11.12-8

samba-winbind-modules: before 4.11.12-8

samba: before 4.11.12-8

CPE2.3

External links

http://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2021-1461

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.

4) Permissions, Privileges, and Access Controls

EUVDB-ID: #VU58096

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-25718

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

Exploit availability: No

Description

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

The vulnerability exists due to Samba AD DC does not correctly sandbox Kerberos tickets issued by an RODC, which leads to security restrictions bypass and privilege escalation.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

openEuler: 20.03 LTS SP1 - 20.03 LTS SP2

samba-vfs-glusterfs: before 4.11.12-8

samba-pidl: before 4.11.12-8

samba-common-tools: before 4.11.12-8

python3-samba-test: before 4.11.12-8

samba-test: before 4.11.12-8

samba-common: before 4.11.12-8

samba-winbind-clients: before 4.11.12-8

samba-libs: before 4.11.12-8

samba-dc-bind-dlz: before 4.11.12-8

python3-samba-dc: before 4.11.12-8

samba-dc: before 4.11.12-8

samba-help: before 4.11.12-8

samba-devel: before 4.11.12-8

samba-dc-provision: before 4.11.12-8

samba-debuginfo: before 4.11.12-8

samba-debugsource: before 4.11.12-8

ctdb: before 4.11.12-8

samba-krb5-printing: before 4.11.12-8

ctdb-tests: before 4.11.12-8

samba-client: before 4.11.12-8

samba-winbind-krb5-locator: before 4.11.12-8

libsmbclient-devel: before 4.11.12-8

libwbclient-devel: before 4.11.12-8

python3-samba: before 4.11.12-8

libsmbclient: before 4.11.12-8

samba-winbind: before 4.11.12-8

libwbclient: before 4.11.12-8

samba-winbind-modules: before 4.11.12-8

samba: before 4.11.12-8

CPE2.3

External links

http://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2021-1461

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.

5) Race condition

EUVDB-ID: #VU58095

Risk: Low

CVSSv3.1: 6.3 [CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-25719

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

Exploit availability: No

Description

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

The vulnerability exists due to a race condition. A remote administrator can exploit the race and escalate privileges on the system.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

openEuler: 20.03 LTS SP1 - 20.03 LTS SP2

samba-vfs-glusterfs: before 4.11.12-8

samba-pidl: before 4.11.12-8

samba-common-tools: before 4.11.12-8

python3-samba-test: before 4.11.12-8

samba-test: before 4.11.12-8

samba-common: before 4.11.12-8

samba-winbind-clients: before 4.11.12-8

samba-libs: before 4.11.12-8

samba-dc-bind-dlz: before 4.11.12-8

python3-samba-dc: before 4.11.12-8

samba-dc: before 4.11.12-8

samba-help: before 4.11.12-8

samba-devel: before 4.11.12-8

samba-dc-provision: before 4.11.12-8

samba-debuginfo: before 4.11.12-8

samba-debugsource: before 4.11.12-8

ctdb: before 4.11.12-8

samba-krb5-printing: before 4.11.12-8

ctdb-tests: before 4.11.12-8

samba-client: before 4.11.12-8

samba-winbind-krb5-locator: before 4.11.12-8

libsmbclient-devel: before 4.11.12-8

libwbclient-devel: before 4.11.12-8

python3-samba: before 4.11.12-8

libsmbclient: before 4.11.12-8

samba-winbind: before 4.11.12-8

libwbclient: before 4.11.12-8

samba-winbind-modules: before 4.11.12-8

samba: before 4.11.12-8

CPE2.3

External links

http://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2021-1461

Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

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

6) Improper Authentication

EUVDB-ID: #VU58094

Risk: Medium

CVSSv3.1: 6.4 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-25721

CWE-ID: CWE-287 - Improper Authentication

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass authentication process.

The vulnerability exists due to an error in when processing authentication requests. A remote attacker can bypass authentication process and gain unauthorized access to the application.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

openEuler: 20.03 LTS SP1 - 20.03 LTS SP2

samba-vfs-glusterfs: before 4.11.12-8

samba-pidl: before 4.11.12-8

samba-common-tools: before 4.11.12-8

python3-samba-test: before 4.11.12-8

samba-test: before 4.11.12-8

samba-common: before 4.11.12-8

samba-winbind-clients: before 4.11.12-8

samba-libs: before 4.11.12-8

samba-dc-bind-dlz: before 4.11.12-8

python3-samba-dc: before 4.11.12-8

samba-dc: before 4.11.12-8

samba-help: before 4.11.12-8

samba-devel: before 4.11.12-8

samba-dc-provision: before 4.11.12-8

samba-debuginfo: before 4.11.12-8

samba-debugsource: before 4.11.12-8

ctdb: before 4.11.12-8

samba-krb5-printing: before 4.11.12-8

ctdb-tests: before 4.11.12-8

samba-client: before 4.11.12-8

samba-winbind-krb5-locator: before 4.11.12-8

libsmbclient-devel: before 4.11.12-8

libwbclient-devel: before 4.11.12-8

python3-samba: before 4.11.12-8

libsmbclient: before 4.11.12-8

samba-winbind: before 4.11.12-8

libwbclient: before 4.11.12-8

samba-winbind-modules: before 4.11.12-8

samba: before 4.11.12-8

CPE2.3

External links

http://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2021-1461

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

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