Denial of service in Linux Kernel

1) Improper input validation

EUVDB-ID: #VU12264

Risk: Low

CVSSv3.1: 6.2 [CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-15121

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

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

The weakness exists due to an application punches a hole in a file that does not end aligned to a page boundary. A local attacker can mount a fuse filesystem and cause the service to crash.

Mitigation

Update to version 4.4.

Vulnerable software versions

Linux kernel: 4.3 - 4.3.6

CPE2.3

• cpe:2.3:o:linux_foundation:linux_kernel:4.3.6:*:*:*:*:*:*:*

External links

http://bugzilla.redhat.com/show_bug.cgi?id=1520893

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.