Ubuntu update for Linux kernel (HWE)

1) Use-after-free error

EUVDB-ID: #VU7255

Risk: Low

CVSSv3.1: 5.7 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-7487

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

The vulnerability allows a local attacker to cause DoS condition on the target system.

The weakness exists due to use-after-free error the ipxitf_ioctl function in net/ipx/af_ipx.c. A local attacker can use a failed SIOCGIFADDR ioctl call for an IPX interface to trigger memory corruption and cause the system to crash.

Successful exploitation of the vulnerability results in denial of service.

Mitigation

Update the affected packages.

Ubuntu 16.04 LTS:

linux-image-4.10.0-33-generic 4.10.0-33.37~16.04.1

linux-image-4.10.0-33-lowlatency 4.10.0-33.37~16.04.1

linux-image-generic-hwe-16.04 4.10.0.33.35

linux-image-lowlatency-hwe-16.04 4.10.0.33.35

linux-image-4.10.0-33-generic-lpae 4.10.0-33.37~16.04.1

linux-image-generic-lpae-hwe-16.04 4.10.0.33.35

Vulnerable software versions

Ubuntu: 16.04

External links

http://www.ubuntu.com/usn/usn-3404-2/

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.