Red Hat Enterprise Linux 9 update for kpatch-patch

1) Type Confusion

EUVDB-ID: #VU65360

Risk: Low

CVSSv3.1: 7.5 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:H/RL:O/RC:C]

CVE-ID: CVE-2022-34918

CWE-ID: CWE-843 - Type confusion

Exploit availability: Yes

Description

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

The vulnerability exists in the Linux kernel’s Netfilter subsystem in the way a user provides incorrect input of the NFT_DATA_VERDICT type. A local user can pass specially crafted data to the application, trigger a type confusion error and escalate privileges on the system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

kpatch-patch-5_14_0-70_13_1 (Red Hat package): 1-1.el9_0

Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions: 9.0

Red Hat Enterprise Linux for Power, little endian - Extended Update Support: 9.0

Red Hat Enterprise Linux for Power, little endian: 9

Red Hat Enterprise Linux for x86_64 - Extended Update Support: 9.0

Red Hat Enterprise Linux for x86_64: 9

kpatch-patch-5_14_0-70_22_1 (Red Hat package): before 1-1.el9_0

kpatch-patch-5_14_0-70_17_1 (Red Hat package): before 1-1.el9_0

External links

http://access.redhat.com/errata/RHSA-2022:6592

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?

Yes. This vulnerability is being exploited in the wild.