Red Hat Enterprise Linux Server - TUS 8.6 update for kernel



Published: 2022-08-03 | Updated: 2022-08-25
Risk Medium
Patch available YES
Number of vulnerabilities 2
CVE-ID CVE-2022-1012
CVE-2022-32250
CWE-ID CWE-401
CWE-416
Exploitation vector Network
Public exploit Public exploit code for vulnerability #2 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 - TUS
Operating systems & Components / Operating system

Red Hat Virtualization Host
Web applications / Remote management & hosting panels

Vendor Red Hat Inc.

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Memory leak

EUVDB-ID: #VU64079

Risk: Medium

CVSSv3.1:

CVE-ID: CVE-2022-1012

CWE-ID: CWE-401 - Improper Release of Memory Before Removing Last Reference ('Memory Leak')

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain access to sensitive information.

The vulnerability exists due to insufficient randomization in the net/ipv4/tcp.c when calculating port offsets in Linux kernel cause by small table perturb size. A remote attacker can cause memory leak and gain access to sensitive information.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

kernel (Red Hat package): 4.18.0-372.16.1.el8_6

Red Hat Enterprise Linux Server - TUS: 8.6

Red Hat Virtualization Host: 4


CPE2.3 External links

http://access.redhat.com/errata/RHSA-2022:5819

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

2) Use-after-free

EUVDB-ID: #VU64668

Risk: Low

CVSSv3.1:

CVE-ID: CVE-2022-32250

CWE-ID: CWE-416 - Use After Free

Exploit availability: Yes

Description

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

The vulnerability exists due to a use-after-free incorrect NFT_STATEFUL_EXPR in net/netfilter/nf_tables_api.c in Linux kernel. A local user with ability to create user/net namespaces can execute arbitrary code with root privileges.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

kernel (Red Hat package): 4.18.0-372.16.1.el8_6

Red Hat Enterprise Linux Server - TUS: 8.6

Red Hat Virtualization Host: 4


CPE2.3 External links

http://access.redhat.com/errata/RHSA-2022:5819

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?



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