Vulnerability identifier: #VU14183

Vulnerability risk: Low

CVSSv3.1: 5 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2018-14616

CWE-ID: CWE-476

Exploitation vector: Local

Exploit availability: No

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

Vendor: Linux Foundation

Description

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

The vulnerability exists due to NULL pointer dereference when the fscrypt_do_page_crypto() function, as defined in the fs/crypto/crypto.c source code file of the affected software, operates on a file in a corrupted Flash-Friendly File System (F2FS) image. A local attacker can mount a malicious F2FS image on a targeted system, operat on a file in the image, and cause the software to crash.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel: 4.17 - 4.17.10, 4.16 - 4.16.18, 4.15 - 4.15.18

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External links
http://bugzilla.kernel.org/show_bug.cgi?id=200465

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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. However, proof of concept for this vulnerability is available.