#VU28409 Out-of-bounds write in Linux kernel - CVE-2019-14896

Vulnerability identifier: #VU28409

Vulnerability risk: High

CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2019-14896

CWE-ID: CWE-787

Exploitation vector: Network

Exploit availability: No

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

Vendor: Linux Foundation

Description

The vulnerability allows a remote non-authenticated attacker to execute arbitrary code.

A heap-based buffer overflow vulnerability was found in the Linux kernel, version kernel-2.6.32, in Marvell WiFi chip driver. A remote attacker could cause a denial of service (system crash) or, possibly execute arbitrary code, when the lbs_ibss_join_existing function is called after a STA connects to an AP.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel: 4.4 - 4.4.211, 4.9 - 4.9.211, 4.14 - 4.19.99, 5.0 - 5.0.21, 5.1 rc1 - 5.1.21, 5.2 - 5.2.21, 5.3 - 5.3.18, 5.4 - 5.4.42

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External links
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.5
https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.4.212
https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.212
https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.169
https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.100
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.16

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

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