Red Hat Enterprise Linux 7.3 update for kernel



Published: 2022-05-11 | Updated: 2022-08-28
Risk Low
Patch available YES
Number of vulnerabilities 3
CVE-ID CVE-2022-0492
CVE-2021-4083
CVE-2021-4028
CWE-ID CWE-264
CWE-416
Exploitation vector Local
Public exploit Public exploit code for vulnerability #1 is available.
Vulnerable software
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kernel (Red Hat package)
Operating systems & Components / Operating system package or component

Red Hat Enterprise Linux Server - AUS
Operating systems & Components / Operating system

Vendor Red Hat Inc.

Security Bulletin

This security bulletin contains information about 3 vulnerabilities.

1) Permissions, Privileges, and Access Controls

EUVDB-ID: #VU61245

Risk: Low

CVSSv3.1:

CVE-ID: CVE-2022-0492

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

Exploit availability: Yes

Description

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

The vulnerability exists due to a logic error within the cgroup_release_agent_write() function in  kernel/cgroup/cgroup-v1.c. A local user can use the cgroups v1 release_agent feature to escalate privileges and bypass the namespace isolation.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

kernel (Red Hat package): 3.10.0-514.6.1.el7 - 3.10.0-514.el7

Red Hat Enterprise Linux Server - AUS: 7.3


CPE2.3 External links

http://access.redhat.com/errata/RHSA-2022:2189

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

2) Use-after-free

EUVDB-ID: #VU61246

Risk: Low

CVSSv3.1:

CVE-ID: CVE-2021-4083

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

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

The vulnerability exists due to a use-after-free error within the Linux kernel's garbage collection for Unix domain socket file handlers. A local user can call close() and fget() simultaneously and can potentially trigger a race condition, which in turn leads to a use-after-free error and allows privilege escalation.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

kernel (Red Hat package): 3.10.0-514.6.1.el7 - 3.10.0-514.el7

Red Hat Enterprise Linux Server - AUS: 7.3


CPE2.3 External links

http://access.redhat.com/errata/RHSA-2022:2189

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

3) Use-after-free

EUVDB-ID: #VU60797

Risk: Low

CVSSv3.1:

CVE-ID: CVE-2021-4028

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

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

The vulnerability exists due to a use-after-free error in the RDMA listen() function in Linux kernel. A local user can run a specially crafted program to trigger a use-after-free error and execute arbitrary code with elevated privileges.


Mitigation

Install updates from vendor's website.

Vulnerable software versions

kernel (Red Hat package): 3.10.0-514.6.1.el7 - 3.10.0-514.el7

Red Hat Enterprise Linux Server - AUS: 7.3


CPE2.3 External links

http://access.redhat.com/errata/RHSA-2022:2189

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?



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