#VU19573 NULL pointer dereference in Linux kernel - CVE-2018-16871

Vulnerability identifier: #VU19573

Vulnerability risk: Medium

CVSSv4.0: 4.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2018-16871

CWE-ID: CWE-476

Exploitation vector: Network

Exploit availability: No

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

Vendor: Linux Foundation

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a NULL pointer dereference error in the Network File System (NFS) implementation. A remote authenticated attacker can mount an exported NFS filesystem, cause a NULL pointer dereference condition due to an invalid NFS sequence and perform a denial of service (DoS) attack.

Mitigation
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

Linux kernel: 3.0 - 3.0.101, 3.1 - 3.19.8, 3.2 - 3.2.93, 3.3 rc1 - 3.3.8, 3.4 - 3.4.113, 3.5 - 3.5.7, 3.6 - 3.6.11, 3.7 - 3.7.10, 3.8 - 3.8.13, 3.9 - 3.9.11, 4.0 - 4.0.9, 4.1 - 4.19.63, 4.2 - 4.20.10, 4.3 - 4.3.6, 4.4 - 4.4.186, 4.5 - 4.5.7, 4.6 rc1 - 4.6.7, 4.7 - 4.7.10, 4.8 - 4.8.17, 4.9 - 4.9.186

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External links
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=01310bb7c9c98752cc763b...
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/patch/?id=01310bb7c9c98752cc763b3...

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.