Red Hat update for kernel

Published: 2019-11-14

Risk	Low
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2019-11135 CVE-2018-12207
CWE-ID	CWE-399 CWE-119
Exploitation vector	Local network
Public exploit	Public exploit code for vulnerability #1 is available.
Vulnerable software Subscribe	Red Hat Enterprise Linux Server - AUS Operating systems & Components / Operating system kernel (Red Hat package) Operating systems & Components / Operating system package or component
Vendor	Red Hat Inc.

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Resource management error

EUVDB-ID: #VU22704

Risk: Low

CVSSv3.1: 5.1 [CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N/E:P/RL:O/RC:C]

CVE-ID: CVE-2019-11135

CWE-ID: CWE-399 - Resource Management Errors

Exploit availability: No

Description

The vulnerability allows a local user to gain access to potentially sensitive information.

The vulnerability exists due to a boundary condition within the TSX Asynchronous Abort (TAA) in Intel CPUs. The TAA condition, on some microprocessors utilizing speculative execution, may allow an authenticated user to potentially enable information disclosure via a side channel.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Red Hat Enterprise Linux Server - AUS: 6.6

kernel (Red Hat package): 2.6.32-71.7.1.el6 - 2.6.32-504.81.2.el6

CPE2.3

External links

http://access.redhat.com/errata/RHSA-2019:3842

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. However, proof of concept for this vulnerability is available.

2) Buffer overflow

EUVDB-ID: #VU22712

Risk: Low

CVSSv3.1: 4.2 [CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-12207

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

The vulnerability allows a local user to perform denial of service (DoS) attack.

The vulnerability exists due to a boundary error in the mechanism responsible for error handling on some Intel platforms. A local user of a guest operating system can use a specially crafted application to trigger memory corruption and cause the host system to stop responding.

Successful exploitation of this vulnerability may result in a denial of service (DoS) attack.

Below is the list of processor families that are affected by this vulnerability:

Client:

Intel Core i3 Processors
Intel Core i5 Processors
Intel Core i7 Processors
Intel Core m Processor Family
2nd generation Intel Core Processors
3rd generation Intel Core Processors
4th generation Intel Core Processors
5th generation Intel Core Processors
6th generation Intel Core Processors
7th generation Intel Core Processors
8th generation Intel Core Processors
Intel Core X-series Processor Family
Intel Pentium Gold Processor Series
Intel Celeron Processor G Series

Server:

2nd Generation Intel Xeon Scalable Processors
Intel Xeon Scalable Processors
Intel Xeon Processor E7 v4 Family
Intel Xeon Processor E7 v3 Family
Intel Xeon Processor E7 v2 Family
Intel Xeon Processor E7 Family
Intel Xeon Processor E5 v4 Family
Intel Xeon Processor E5 v3 Family
Intel Xeon Processor E5 v2 Family
Intel Xeon Processor E5 Family
Intel Xeon Processor E3 v6 Family
Intel Xeon Processor E3 v5 Family
Intel Xeon Processor E3 v4 Family
Intel Xeon Processor E3 v3 Family
Intel Xeon Processor E3 v2 Family
Intel Xeon Processor E3 Family
Intel Xeon E Processor
Intel Xeon D Processor
Intel Xeon W Processor
Legacy Intel Xeon Processor