Red Hat 6 update for kernel



Published: 2019-12-18
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2019-14821
CWE-ID CWE-787
Exploitation vector Local
Public exploit N/A
Vulnerable software
Subscribe
kernel (Red Hat package)
Operating systems & Components / Operating system package or component

Red Hat Enterprise Linux for Power, big endian
Operating systems & Components / Operating system

Red Hat Enterprise Linux for Scientific Computing
Operating systems & Components / Operating system

Red Hat Enterprise Linux for IBM z Systems
Operating systems & Components / Operating system

Red Hat Enterprise Linux Desktop
Operating systems & Components / Operating system

Red Hat Enterprise Linux Workstation
Operating systems & Components / Operating system

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

Vendor Red Hat Inc.

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Out-of-bounds write

EUVDB-ID: #VU21255

Risk: Low

CVSSv3.1:

CVE-ID: CVE-2019-14821

CWE-ID: CWE-787 - Out-of-bounds write

Exploit availability: No

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

:


CPE2.3 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?



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