Ubuntu update for Linux kernel

1) Privilege escalation

EUVDB-ID: #VU1009

Risk: Low

CVSSv3.1: 5.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2016-7425

CWE-ID: CWE-805 - Buffer Access with Incorrect Length Value

Exploit availability: No

Description

The vulnerability allows a local user to gain elevated privileges on the target system.
The weakness is due to insufficient restriction of length field by arcmsr_iop_message_xfer function in drivers/scsi/arcmsr/arcmsr_hba.c. By sending an ARCMSR_MESSAGE_WRITE_WQBUFFER control code, attackers can gain elevated privileges and trigger a heap-based buffer overflow.
Success fule exploitation of the vulnerability may result in denial of service on the vulnerable system.

Mitigation

Update the affected packages

Ubuntu 12.04 LTS:

linux-image-powerpc-smp 3.2.0.116.132

linux-image-3.2.0-116-generic 3.2.0-116.158

linux-image-3.2.0-116-virtual 3.2.0-116.158

linux-image-3.2.0-116-generic-pae 3.2.0-116.158

linux-image-generic 3.2.0.116.132

linux-image-generic-pae 3.2.0.116.132

linux-image-highbank 3.2.0.116.132

linux-image-3.2.0-116-powerpc64-smp 3.2.0-116.158

linux-image-virtual 3.2.0.116.132

linux-image-powerpc64-smp 3.2.0.116.132

linux-image-3.2.0-116-highbank 3.2.0-116.158

linux-image-3.2.0-116-omap 3.2.0-116.158

linux-image-3.2.0-116-powerpc-smp 3.2.0-116.158

linux-image-omap 3.2.0.116.132

Vulnerable software versions

Ubuntu: 12.04

External links

http://www.ubuntu.com/usn/usn-3144-1/

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.