Ubuntu update for Linux kernel



Risk High
Patch available YES
Number of vulnerabilities 2
CVE-ID CVE-2016-8633
CVE-2017-14106
CWE-ID CWE-16
CWE-369
Exploitation vector Network
Public exploit N/A
Vulnerable software
 Ubuntu
Operating systems & Components / Operating system

Vendor Canonical Ltd.

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Configuration error

EUVDB-ID: #VU12261

Risk: High

CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2016-8633

CWE-ID: CWE-16 - Configuration

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The weakness exists in drivers/firewire/net.c due to using certain unusual hardware configurations. A remote attacker can execute arbitrary code via specially crafted fragmented packets.

Successful exploitation of the vulnerability may result in system compromise.

Mitigation

Update the affected packages

Ubuntu 12.04 LTS:
linux-image-powerpc-smp 3.2.0.131.145
linux-image-3.2.0-131-omap 3.2.0-131.177
linux-image-3.2.0-131-powerpc-smp 3.2.0-131.177
linux-image-generic 3.2.0.131.145
linux-image-3.2.0-131-generic-pae 3.2.0-131.177
linux-image-3.2.0-131-highbank 3.2.0-131.177
linux-image-generic-pae 3.2.0.131.145
linux-image-3.2.0-131-virtual 3.2.0-131.177
linux-image-highbank 3.2.0.131.145
linux-image-powerpc64-smp 3.2.0.131.145
linux-image-3.2.0-131-generic 3.2.0-131.177
linux-image-omap 3.2.0.131.145
linux-image-3.2.0-131-powerpc64-smp 3.2.0-131.177

Vulnerable software versions

Ubuntu: 12.04

CPE2.3 External links

https://www.ubuntu.com/usn/usn-3445-2/


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

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

Risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2017-14106

CWE-ID: CWE-369 - Divide By Zero

Exploit availability: No

Description

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

The weakness exists due to divide-by-zero error in the tcp_disconnect() function in net/ipv4/tcp.c. A local attacker can trigger a disconnect within a certain tcp_recvmsg code path and cause kernel panic.

Successful exploitation of the vulnerability results in denial of service.

Mitigation

Update the affected packages

Ubuntu 12.04 LTS:
linux-image-powerpc-smp 3.2.0.131.145
linux-image-3.2.0-131-omap 3.2.0-131.177
linux-image-3.2.0-131-powerpc-smp 3.2.0-131.177
linux-image-generic 3.2.0.131.145
linux-image-3.2.0-131-generic-pae 3.2.0-131.177
linux-image-3.2.0-131-highbank 3.2.0-131.177
linux-image-generic-pae 3.2.0.131.145
linux-image-3.2.0-131-virtual 3.2.0-131.177
linux-image-highbank 3.2.0.131.145
linux-image-powerpc64-smp 3.2.0.131.145
linux-image-3.2.0-131-generic 3.2.0-131.177
linux-image-omap 3.2.0.131.145
linux-image-3.2.0-131-powerpc64-smp 3.2.0-131.177

Vulnerable software versions

Ubuntu: 12.04

CPE2.3
External links

https://www.ubuntu.com/usn/usn-3445-2/


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.



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