Red Hat Enterprise Linux for Real Time 8.2 update for kernel-rt



Risk High
Patch available YES
Number of vulnerabilities 3
CVE-ID CVE-2020-8649
CVE-2022-0435
CVE-2020-8647
CWE-ID CWE-416
CWE-121
Exploitation vector Network
Public exploit N/A
Vulnerable software
Subscribe 		kernel-rt (Red Hat package)
Operating systems & Components / Operating system package or component

Red Hat Enterprise Linux for Real Time for NFV
Operating systems & Components / Operating system

Red Hat Enterprise Linux for Real Time
Operating systems & Components / Operating system

Vendor Red Hat Inc.

Security Bulletin

This security bulletin contains information about 3 vulnerabilities.

1) Use-after-free

EUVDB-ID: #VU28414

Risk: Medium

CVSSv3.1: 5.2 [CVSS:3.1/AV:P/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-8649

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

The vulnerability allows a local authenticated user to #BASIC_IMPACT#.

There is a use-after-free vulnerability in the Linux kernel through 5.5.2 in the vgacon_invert_region function in drivers/video/console/vgacon.c.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

kernel-rt (Red Hat package): 4.18.0-193.1.2.rt13.53.el8_2 - 4.18.0-193.79.1.rt13.129.el8_2

Red Hat Enterprise Linux for Real Time for NFV: 8.2

Red Hat Enterprise Linux for Real Time: 8.2

CPE2.3 External links

http://access.redhat.com/errata/RHSA-2022:1209


Q & A

Can this vulnerability be exploited remotely?

No. The attacker should have physical access to the system in order to successfully exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

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

2) Stack-based buffer overflow

EUVDB-ID: #VU61216

Risk: High

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

CVE-ID: CVE-2022-0435

CWE-ID: CWE-121 - Stack-based buffer overflow

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error in the Linux kernel networking module for the Transparent Inter-Process Communication (TIPC) protocol. A remote unauthenticated attacker can send specially crafted traffic to the system, trigger a stack-based buffer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system but requires that the TIPC bearer is set up.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

kernel-rt (Red Hat package): 4.18.0-193.1.2.rt13.53.el8_2 - 4.18.0-193.79.1.rt13.129.el8_2

Red Hat Enterprise Linux for Real Time for NFV: 8.2

Red Hat Enterprise Linux for Real Time: 8.2

CPE2.3 External links

http://access.redhat.com/errata/RHSA-2022:1209


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.

3) Use-after-free

EUVDB-ID: #VU28415

Risk: Low

CVSSv3.1: 5.3 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-8647

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

The vulnerability allows a local authenticated user to #BASIC_IMPACT#.

There is a use-after-free vulnerability in the Linux kernel through 5.5.2 in the vc_do_resize function in drivers/tty/vt/vt.c.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

kernel-rt (Red Hat package): 4.18.0-193.1.2.rt13.53.el8_2 - 4.18.0-193.79.1.rt13.129.el8_2

Red Hat Enterprise Linux for Real Time for NFV: 8.2

Red Hat Enterprise Linux for Real Time: 8.2

CPE2.3 External links

http://access.redhat.com/errata/RHSA-2022:1209


Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

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



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