Red Hat 6 update for kernel

1) Out-of-bounds write

EUVDB-ID: #VU21255

Risk: Low

CVSSv3.1:

CVE-ID: CVE-2019-14821

CWE-ID:

Exploit availability:

Description

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

The vulnerability exists due to a boundary error in the KVM coalesced MMIO support functionality due to incorrect processing of shared indexes. A local user can run a specially crafted application to trigger an out-of-bounds write error and write data to arbitrary address in the kernel memory.

Successful vulnerability exploitation may allow an attacker to execute arbitrary code on the system with root privileges.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

kernel (Red Hat package): 2.6.32-71.7.1.el6 - 2.6.32-754.24.3.el6

Red Hat Enterprise Linux for Power, big endian: 6

Red Hat Enterprise Linux for Scientific Computing: 6

Red Hat Enterprise Linux for IBM z Systems: 6

Red Hat Enterprise Linux Desktop: 6

Red Hat Enterprise Linux Workstation: 6

Red Hat Enterprise Linux Server: 6.0

:

Fixed software versions

CPE2.3

• cpe:2.3:o:red_hat:kernel:2.6.32-504.80.2.el6:*:*:*:*:red_hat_enterprise_linux:*:*

External links

http://access.redhat.com/errata/RHSA-2019:4256

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?