Ubuntu update for Linux kernel



| Updated: 2017-08-16
Risk Low
Patch available YES
Number of vulnerabilities 2
CVE-ID CVE-2017-1000112
CVE-2017-1000111
CWE-ID CWE-119
CWE-362
Exploitation vector Local
Public exploit Public exploit code for vulnerability #1 is available.
Vulnerable software
 Ubuntu
Operating systems & Components / Operating system

Vendor Canonical Ltd.

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Privilege escalation

EUVDB-ID: #VU7954

Risk: Low

CVSSv3.1: 8.2 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:F/RL:O/RC:C]

CVE-ID: CVE-2017-1000112

CWE-ID: CWE-119 - Memory corruption

Exploit availability: Yes

Description

The vulnerability allows a local attacker to gain elevated privileges on the target system.

The weakness exists due to race condition in the UDP Fragmentation Offload (UFO) code. A local attacker can send specially crafted UFO packets, trigger memory corruption and execute arbitrary code with elevated privileges.

Successful exploitation of the vulnerability may result in system compromise.

Mitigation

Update the affected packages.

Ubuntu 17.04:
linux-image-4.10.0-32-generic-lpae 4.10.0-32.36
linux-image-generic 4.10.0.32.32
linux-image-generic-lpae 4.10.0.32.32
linux-image-4.10.0-32-generic 4.10.0-32.36
linux-image-4.10.0-1015-raspi2 4.10.0-1015.18
linux-image-4.10.0-32-lowlatency 4.10.0-32.36
linux-image-lowlatency 4.10.0.32.32
linux-image-raspi2 4.10.0.1015.16

Vulnerable software versions

Ubuntu: 17.04

CPE2.3 External links

http://www.ubuntu.com/usn/usn-3384-1/


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. However, a fully functional exploit for this vulnerability is available.

2) Privilege escalation

EUVDB-ID: #VU7865

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-2017-1000111

CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

Exploit availability: No

Description

The vulnerability allows a local attacker to gain elevated privileges on the target system.

The weakness exists in the packet_set_ring function due to improper implementation of raw packet sockets in the networking subsystem of the affected software that handles synchronization. A local attacker with CAP_NET_RAW permissions can open a raw packet socket, trigger a race condition, eventually cause use-after-free error and execute arbitrary code with root privileges.

Successful exploitation of the vulnerability may result in system compromise.

Mitigation

Update the affected packages.

Ubuntu 17.04:
linux-image-4.10.0-32-generic-lpae 4.10.0-32.36
linux-image-generic 4.10.0.32.32
linux-image-generic-lpae 4.10.0.32.32
linux-image-4.10.0-32-generic 4.10.0-32.36
linux-image-4.10.0-1015-raspi2 4.10.0-1015.18
linux-image-4.10.0-32-lowlatency 4.10.0-32.36
linux-image-lowlatency 4.10.0.32.32
linux-image-raspi2 4.10.0.1015.16

Vulnerable software versions

Ubuntu: 17.04

CPE2.3
External links

http://www.ubuntu.com/usn/usn-3384-1/


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.



###SIDEBAR###