Red Hat update for kernel

1) Security restrictions bypass

EUVDB-ID: #VU13631

Risk: Low

CVSSv3.1: 4.5 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-13405

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

Exploit availability: No

Description

The vulnerability allows a local attacker to create arbitrary files on the target system.

The vulnerability exists due to the inode_init_owner function, as defined in the fs/inode.c source code file, allows the creation of arbitrary files in set-group identification (SGID) directories. A local attacker can create arbitrary files with unintended group ownership.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Red Hat Enterprise Linux for Power, little endian - Extended Update Support: 7.5

Red Hat Enterprise Linux for Power, big endian - Extended Update Support: 7.5

Red Hat Enterprise Linux for IBM z Systems - Extended Update Support: 7.5

Red Hat Enterprise Linux Server - Extended Update Support: 7.5

kernel (Red Hat package): 3.10.0-123.1.2.el7 - 3.10.0-862.34.2.el7

Red Hat Enterprise Linux EUS Compute Node: 7.5

:

External links

http://access.redhat.com/errata/RHSA-2019:2566

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.