Vulnerability identifier: #VU8694

Vulnerability risk: Low

CVSSv3.1: 5.7 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-12153

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 user to perform a denial of service (DoS) attack.

A security flaw was discovered in the nl80211_set_rekey_data() function in net/wireless/nl80211.c in the Linux kernel through 4.13.3. This function does not check whether the required attributes are present in a Netlink request. This request can be issued by a user with the CAP_NET_ADMIN capability and may result in a NULL pointer dereference and system crash.

Mitigation
Install the latest version of Linux kernel 4.4.90, 4.13.5 or 4.9.53.

Vulnerable software versions

Linux kernel: 4.13 - 4.13.4, 4.9 - 4.9.52, 4.4 - 4.4.89

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External links
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.4.90
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.13.5
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.53

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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.