Ubuntu update for Linux kernel (Wily HWE)

1) Improper check or handling of exceptional conditions

EUVDB-ID: #VU3355

Risk: Low

CVSSv4.0: 4.9 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2015-5307

CWE-ID: CWE-703 - Improper Check or Handling of Exceptional Conditions

Exploit availability: No

Description

The vulnerability allows an adjacent attacker to cause DoS condition on the target system.

The weakness exists in the KVM subsystem due to many #AC (aka Alignment Check) exceptions, related to svm.c and vmx.c. An adjacent attacker can cause the service to crash.

Mitigation

Update the affected packages

Ubuntu 14.04 LTS:

linux-image-4.2.0-18-lowlatency 4.2.0-18.22~14.04.1

linux-image-4.2.0-18-generic-lpae 4.2.0-18.22~14.04.1

linux-image-4.2.0-18-powerpc64-emb 4.2.0-18.22~14.04.1

linux-image-4.2.0-18-generic 4.2.0-18.22~14.04.1

linux-image-4.2.0-18-powerpc-e500mc 4.2.0-18.22~14.04.1

linux-image-4.2.0-18-powerpc64-smp 4.2.0-18.22~14.04.1

linux-image-4.2.0-18-powerpc-smp 4.2.0-18.22~14.04.1

Vulnerable software versions

Ubuntu: 14.04

CPE2.3

• cpe:2.3:o:canonical:ubuntu:14.04:*:*:*:*:*:*:*

External links

https://www.ubuntu.com/usn/usn-2807-1/

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.