Ubuntu update for Linux kernel (HWE)

Published: 2017-10-10

Risk	Low
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2017-1000255 CVE-2017-14106
CWE-ID	CWE-119 CWE-369
Exploitation vector	Local
Public exploit	N/A
Vulnerable software Subscribe	Ubuntu Operating systems & Components / Operating system
Vendor	Canonical Ltd.

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Memory corruption

EUVDB-ID: #VU8812

Risk: Low

CVSSv3.1: 7.7 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-1000255

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

The vulnerability allows a local user to execute arbitrary code with escalated privileges.

The vulnerability exists due to a boundary error in the Linux kernel's when handling signal frame on PowerPC systems. A malicious local user process could craft a signal frame allowing an attacker to corrupt memory and execute arbitrary code on the target system with escalated privileges.

Mitigation

Update the affected packages

Ubuntu 16.04 LTS:

linux-image-4.10.0-37-lowlatency 4.10.0-37.41~16.04.1

linux-image-lowlatency-hwe-16.04 4.10.0.37.39

linux-image-generic-hwe-16.04 4.10.0.37.39

linux-image-4.10.0-37-generic-lpae 4.10.0-37.41~16.04.1

linux-image-4.10.0-37-generic 4.10.0-37.41~16.04.1

linux-image-generic-lpae-hwe-16.04 4.10.0.37.39

Vulnerable software versions

Ubuntu: 16.04

External links

http://www.ubuntu.com/usn/usn-3443-2/

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.

2) Divide by zero

EUVDB-ID: #VU8922