#VU12264 Improper input validation in Linux kernel - CVE-2017-15121

Vulnerability identifier: #VU12264

Vulnerability risk: Low

CVSSv4.0: 4.6 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2017-15121

CWE-ID: CWE-20

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Linux kernel
Operating systems & Components / Operating system

Vendor: Linux Foundation

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

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External links
https://bugzilla.redhat.com/show_bug.cgi?id=1520893

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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.