Red Hat update for kernel-rt

Published: 2017-02-22

Risk	Low
Patch available	YES
Number of vulnerabilities	1
CVE-ID	CVE-2017-6074
CWE-ID	CWE-399
Exploitation vector	Local
Public exploit	Public exploit code for vulnerability #1 is available.
Vulnerable software Subscribe	kernel-rt (Red Hat package) Operating systems & Components / Operating system package or component Red Hat Enterprise Linux for Real Time Operating systems & Components / Operating system Red Hat Enterprise Linux for Real Time for NFV Operating systems & Components / Operating system
Vendor	Red Hat Inc.

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Resource management error

EUVDB-ID: #VU5869

Risk: Low

CVSSv3.1:

CVE-ID: CVE-2017-6074

CWE-ID: CWE-399 - Resource Management Errors

Exploit availability: Yes

Description

The vulnerability allows a local user to cause kernel panic.

The vulnerability exists due to invalid free in the dccp_rcv_state_process() function in net/dccp/input.c file in the Linux kernel through 4.9.11 when processing DCCP_PKT_REQUEST packet data structures in the LISTEN state. A local user can use userspace application to make an IPV6_RECVPKTINFO setsockopt system call and cause kernel panic.

Successful exploitation of this vulnerability may result in denial of service condition.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

kernel-rt (Red Hat package): 3.10.0-229.1.2.rt56.141.2.el7_1 - 3.10.0-514.6.1.rt56.429.el7

Red Hat Enterprise Linux for Real Time: 7

Red Hat Enterprise Linux for Real Time for NFV: 7

CPE2.3

cpe:2.3:o:red_hat:kernel-rt:3.10.0-229.1.2.rt56.141.2.el7_1:*:*:*:*:red_hat_enterprise_linux:*:*

External links

http://access.redhat.com/errata/RHSA-2017:0295

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?