Ubuntu update for Linux kernel (Xenial HWE)
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 3 |
| CVE-ID | CVE-2016-7039 CVE-2016-6828 CVE-2016-6480 |
| CWE-ID | CWE-400 CWE-416 CWE-362 |
| Exploitation vector | Network |
| Public exploit | Public exploit code for vulnerability #2 is available. |
| Vulnerable software Subscribe |
Linux kernel Operating systems & Components / Operating system Ubuntu Operating systems & Components / Operating system |
| Vendor |
Linux Foundation Canonical Ltd. |
Security Bulletin
This security bulletin contains information about 3 vulnerabilities.
1) Resource exhaustion
EUVDB-ID: #VU1174
Risk: Medium
CVSSv3.1: 7.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2016-7039
CWE-ID:
CWE-400 - Resource exhaustion
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to cause DoS condition on the target system.
The weakness exists in the IP stack due to stack consumption. A remote attacker can trigger use of the GRO path for large crafted packets, as demonstrated by packets that contain only VLAN headers, and cause the service to crash.
Update the affected packages
Linux kernel: 4.1.1 - 4.8.2
CPE2.3- cpe:2.3:o:linux_foundation:linux_kernel:4.8.2:*:*:*:*:*:*:*
- cpe:2.3:o:linux_foundation:linux_kernel:4.1.36:*:*:*:*:*:*:*
http://www.ubuntu.com/usn/usn-3099-2/
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) “Use-after-free” error
EUVDB-ID: #VU360
Risk: Low
CVSSv3.1: 5.9 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H/E:P/RL:O/RC:C]
CVE-ID: CVE-2016-6828
CWE-ID:
CWE-416 - Use After Free
Exploit availability: Yes
DescriptionThe vulnerability allows local users to provoke a denial of service.
The vulnerability predicts TCP realization by a local user.
Successful exploitation of this vulnerability will allow an attacker to cause a denial of service.
MitigationUpdate the affected packages
Ubuntu: 14.04
CPE2.3 External linkshttp://www.ubuntu.com/usn/usn-3099-2/
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. However, proof of concept for this vulnerability is available.
3) Race condition
EUVDB-ID: #VU359
Risk: Medium
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-2016-6480
Exploit availability: No
DescriptionThe vulnerability allows local users to provoke a denial of service.
The vulnerability exists due to parafunction of ioctl_send_fib. By altering "double fetch" vulnerability, a local user can provoke a denial of service.
Successful exploitation of this vulnerability will allow an attacker to cause a denial of service
MitigationUpdate the affected packages
Ubuntu: 14.04
CPE2.3 External linkshttp://www.ubuntu.com/usn/usn-3099-2/
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.
