Red Hat Enterprise Linux 8 update for samba



Published: 2021-12-13 | Updated: 2022-03-22
Risk High
Patch available YES
Number of vulnerabilities 3
CVE-ID CVE-2020-25717
CVE-2021-23192
CVE-2016-2124
CWE-ID CWE-264
CWE-20
CWE-284
Exploitation vector Network
Public exploit N/A
Vulnerable software
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Red Hat CodeReady Linux Builder for IBM z Systems
Operating systems & Components / Operating system

Red Hat CodeReady Linux Builder for ARM 64
Operating systems & Components / Operating system

Red Hat CodeReady Linux Builder for Power, little endian
Operating systems & Components / Operating system

Red Hat CodeReady Linux Builder for x86_64
Operating systems & Components / Operating system

Red Hat Enterprise Linux for ARM 64
Operating systems & Components / Operating system

Red Hat Enterprise Linux for Power, little endian
Operating systems & Components / Operating system

Red Hat Enterprise Linux for IBM z Systems
Operating systems & Components / Operating system

Red Hat Enterprise Linux for x86_64
Operating systems & Components / Operating system

samba (Red Hat package)
Operating systems & Components / Operating system package or component

Vendor Red Hat Inc.

Security Bulletin

This security bulletin contains information about 3 vulnerabilities.

1) Permissions, Privileges, and Access Controls

EUVDB-ID: #VU58097

Risk: Medium

CVSSv3.1:

CVE-ID: CVE-2020-25717

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 the Windows Active Directory (AD) domains have by default a feature to allow users to create computer accounts. A remote authenticated attacker can create such account with elevated privileges on the system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Red Hat CodeReady Linux Builder for IBM z Systems: 8.0

Red Hat CodeReady Linux Builder for ARM 64: 8.0

Red Hat CodeReady Linux Builder for Power, little endian: 8.0

Red Hat CodeReady Linux Builder for x86_64: 8.0

Red Hat Enterprise Linux for ARM 64: 8

Red Hat Enterprise Linux for Power, little endian: 8

Red Hat Enterprise Linux for IBM z Systems: 8

Red Hat Enterprise Linux for x86_64: 8.0

samba (Red Hat package): before 4.14.5-7.el8_5


CPE2.3 External links

http://access.redhat.com/errata/RHSA-2021:5082

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

2) Input validation error

EUVDB-ID: #VU58091

Risk: Medium

CVSSv3.1:

CVE-ID: CVE-2021-23192

CWE-ID: CWE-20 - Improper Input Validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to compromise the target system.

The vulnerability exists due to the DCE/RPC fragment injection issue. A remote attacker can replace subsequent fragments in requests with their own data and alter the server behavior.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Red Hat CodeReady Linux Builder for IBM z Systems: 8.0

Red Hat CodeReady Linux Builder for ARM 64: 8.0

Red Hat CodeReady Linux Builder for Power, little endian: 8.0

Red Hat CodeReady Linux Builder for x86_64: 8.0

Red Hat Enterprise Linux for ARM 64: 8

Red Hat Enterprise Linux for Power, little endian: 8

Red Hat Enterprise Linux for IBM z Systems: 8

Red Hat Enterprise Linux for x86_64: 8.0

samba (Red Hat package): before 4.14.5-7.el8_5


CPE2.3 External links

http://access.redhat.com/errata/RHSA-2021:5082

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

3) Improper access control

EUVDB-ID: #VU58098

Risk: High

CVSSv3.1:

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 website.

Vulnerable software versions

Red Hat CodeReady Linux Builder for IBM z Systems: 8.0

Red Hat CodeReady Linux Builder for ARM 64: 8.0

Red Hat CodeReady Linux Builder for Power, little endian: 8.0

Red Hat CodeReady Linux Builder for x86_64: 8.0

Red Hat Enterprise Linux for ARM 64: 8

Red Hat Enterprise Linux for Power, little endian: 8

Red Hat Enterprise Linux for IBM z Systems: 8

Red Hat Enterprise Linux for x86_64: 8.0

samba (Red Hat package): before 4.14.5-7.el8_5


CPE2.3 External links

http://access.redhat.com/errata/RHSA-2021:5082

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?



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